java/8 : javax/sql/rowset/serial/SerialArray.java

SerialArray
https://openjdk.java.net/
GPLv2 + Classpath Exception
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 * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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package javax.sql.rowset.serial;

import java.sql.*;
import java.io.*;
import java.util.Map;
import java.net.URL;
import java.util.Arrays;


A serialized version of an Array
object, which is the mapping in the Java programming language of an SQL
ARRAY value.

The SerialArray class provides a constructor for creating
a SerialArray instance from an Array object,
methods for getting the base type and the SQL name for the base type, and
methods for copying all or part of a SerialArray object.

Note: In order for this class to function correctly, a connection to the
data source
must be available in order for the SQL Array object to be
materialized (have all of its elements brought to the client server)
if necessary. At this time, logical pointers to the data in the data source,
such as locators, are not currently supported.
 Thread safety 
A SerialArray is not safe for use by multiple concurrent threads.  If a
SerialArray is to be used by more than one thread then access to the
SerialArray should be controlled by appropriate synchronization.
/**
 * A serialized version of an <code>Array</code>
 * object, which is the mapping in the Java programming language of an SQL
 * <code>ARRAY</code> value.
 * <P>
 * The <code>SerialArray</code> class provides a constructor for creating
 * a <code>SerialArray</code> instance from an <code>Array</code> object,
 * methods for getting the base type and the SQL name for the base type, and
 * methods for copying all or part of a <code>SerialArray</code> object.
 * <P>
 *
 * Note: In order for this class to function correctly, a connection to the
 * data source
 * must be available in order for the SQL <code>Array</code> object to be
 * materialized (have all of its elements brought to the client server)
 * if necessary. At this time, logical pointers to the data in the data source,
 * such as locators, are not currently supported.
 *
 * <h3> Thread safety </h3>
 *
 * A SerialArray is not safe for use by multiple concurrent threads.  If a
 * SerialArray is to be used by more than one thread then access to the
 * SerialArray should be controlled by appropriate synchronization.
 *
 */
public class SerialArray implements Array, Serializable, Cloneable {

    A serialized array in which each element is an Object
in the Java programming language that represents an element
in the SQL ARRAY value.
@serial /**
     * A serialized array in which each element is an <code>Object</code>
     * in the Java programming language that represents an element
     * in the SQL <code>ARRAY</code> value.
     * @serial
     */
    private Object[] elements;

    The SQL type of the elements in this SerialArray object.  The
type is expressed as one of the constants from the class
java.sql.Types.
@serial /**
     * The SQL type of the elements in this <code>SerialArray</code> object.  The
     * type is expressed as one of the constants from the class
     * <code>java.sql.Types</code>.
     * @serial
     */
    private int baseType;

    The type name used by the DBMS for the elements in the SQL ARRAY
value that this SerialArray object represents.
@serial /**
     * The type name used by the DBMS for the elements in the SQL <code>ARRAY</code>
     * value that this <code>SerialArray</code> object represents.
     * @serial
     */
    private String baseTypeName;

    The number of elements in this SerialArray object, which
is also the number of elements in the SQL ARRAY value
that this SerialArray object represents.
@serial /**
     * The number of elements in this <code>SerialArray</code> object, which
     * is also the number of elements in the SQL <code>ARRAY</code> value
     * that this <code>SerialArray</code> object represents.
     * @serial
     */
    private int len;

    Constructs a new SerialArray object from the given
Array object, using the given type map for the custom
mapping of each element when the elements are SQL UDTs.

This method does custom mapping if the array elements are a UDT
and the given type map has an entry for that UDT.
Custom mapping is recursive,
meaning that if, for instance, an element of an SQL structured type
is an SQL structured type that itself has an element that is an SQL
structured type, each structured type that has a custom mapping will be
mapped according to the given type map.

The new SerialArray
object contains the same elements as the Array object
from which it is built, except when the base type is the SQL type
STRUCT, ARRAY, BLOB,
CLOB, DATALINK or JAVA_OBJECT.
In this case, each element in the new
SerialArray object is the appropriate serialized form,
that is, a SerialStruct, SerialArray,
SerialBlob, SerialClob,
SerialDatalink, or SerialJavaObject object.

Note: (1) The Array object from which a SerialArray
object is created must have materialized the SQL ARRAY value's
data on the client before it is passed to the constructor.  Otherwise,
the new SerialArray object will contain no data.

Note: (2) If the Array contains java.sql.Types.JAVA_OBJECT
types, the SerialJavaObject constructor is called where checks
are made to ensure this object is serializable.

Note: (3) The Array object supplied to this constructor cannot
return null for any Array.getArray() methods.
SerialArray cannot serialize null array values.
Params: array – the Array object to be serialized
map – a java.util.Map object in which
       each entry consists of 1) a String object
       giving the fully qualified name of a UDT (an SQL structured type or
       distinct type) and 2) the
       Class object for the SQLData implementation
       that defines how the UDT is to be mapped. The map
       parameter does not have any effect for Blob,
       Clob, DATALINK, or
       JAVA_OBJECT types.
Throws: SerialException – if an error occurs serializing the
       Array object
SQLException – if a database access error occurs or if the
       array or the map values are null/**
     * Constructs a new <code>SerialArray</code> object from the given
     * <code>Array</code> object, using the given type map for the custom
     * mapping of each element when the elements are SQL UDTs.
     * <P>
     * This method does custom mapping if the array elements are a UDT
     * and the given type map has an entry for that UDT.
     * Custom mapping is recursive,
     * meaning that if, for instance, an element of an SQL structured type
     * is an SQL structured type that itself has an element that is an SQL
     * structured type, each structured type that has a custom mapping will be
     * mapped according to the given type map.
     * <P>
     * The new <code>SerialArray</code>
     * object contains the same elements as the <code>Array</code> object
     * from which it is built, except when the base type is the SQL type
     * <code>STRUCT</code>, <code>ARRAY</code>, <code>BLOB</code>,
     * <code>CLOB</code>, <code>DATALINK</code> or <code>JAVA_OBJECT</code>.
     * In this case, each element in the new
     * <code>SerialArray</code> object is the appropriate serialized form,
     * that is, a <code>SerialStruct</code>, <code>SerialArray</code>,
     * <code>SerialBlob</code>, <code>SerialClob</code>,
     * <code>SerialDatalink</code>, or <code>SerialJavaObject</code> object.
     * <P>
     * Note: (1) The <code>Array</code> object from which a <code>SerialArray</code>
     * object is created must have materialized the SQL <code>ARRAY</code> value's
     * data on the client before it is passed to the constructor.  Otherwise,
     * the new <code>SerialArray</code> object will contain no data.
     * <p>
     * Note: (2) If the <code>Array</code> contains <code>java.sql.Types.JAVA_OBJECT</code>
     * types, the <code>SerialJavaObject</code> constructor is called where checks
     * are made to ensure this object is serializable.
     * <p>
     * Note: (3) The <code>Array</code> object supplied to this constructor cannot
     * return <code>null</code> for any <code>Array.getArray()</code> methods.
     * <code>SerialArray</code> cannot serialize null array values.
     *
     *
     * @param array the <code>Array</code> object to be serialized
     * @param map a <code>java.util.Map</code> object in which
     *        each entry consists of 1) a <code>String</code> object
     *        giving the fully qualified name of a UDT (an SQL structured type or
     *        distinct type) and 2) the
     *        <code>Class</code> object for the <code>SQLData</code> implementation
     *        that defines how the UDT is to be mapped. The <i>map</i>
     *        parameter does not have any effect for <code>Blob</code>,
     *        <code>Clob</code>, <code>DATALINK</code>, or
     *        <code>JAVA_OBJECT</code> types.
     * @throws SerialException if an error occurs serializing the
     *        <code>Array</code> object
     * @throws SQLException if a database access error occurs or if the
     *        <i>array</i> or the <i>map</i> values are <code>null</code>
     */
     public SerialArray(Array array, Map<String,Class<?>> map)
         throws SerialException, SQLException
     {

        if ((array == null) || (map == null)) {
            throw new SQLException("Cannot instantiate a SerialArray " +
            "object with null parameters");
        }

        if ((elements = (Object[])array.getArray()) == null) {
             throw new SQLException("Invalid Array object. Calls to Array.getArray() " +
                 "return null value which cannot be serialized");
         }

        elements = (Object[])array.getArray(map);
        baseType = array.getBaseType();
        baseTypeName = array.getBaseTypeName();
        len = elements.length;

        switch (baseType) {
            case java.sql.Types.STRUCT:
                for (int i = 0; i < len; i++) {
                    elements[i] = new SerialStruct((Struct)elements[i], map);
                }
            break;

            case java.sql.Types.ARRAY:
                for (int i = 0; i < len; i++) {
                    elements[i] = new SerialArray((Array)elements[i], map);
                }
            break;

            case java.sql.Types.BLOB:
            for (int i = 0; i < len; i++) {
                elements[i] = new SerialBlob((Blob)elements[i]);
            }
            break;

            case java.sql.Types.CLOB:
                for (int i = 0; i < len; i++) {
                    elements[i] = new SerialClob((Clob)elements[i]);
                }
            break;

            case java.sql.Types.DATALINK:
                for (int i = 0; i < len; i++) {
                    elements[i] = new SerialDatalink((URL)elements[i]);
                }
            break;

            case java.sql.Types.JAVA_OBJECT:
                for (int i = 0; i < len; i++) {
                elements[i] = new SerialJavaObject(elements[i]);
            }
        }
  }

    This method frees the SeriableArray object and releases the resources that it holds. The object is invalid once the free method is called.  If free is called multiple times, the subsequent calls to free are treated as a no-op. 
Throws: SQLException – if an error occurs releasing the SerialArray's resources
Since: 1.6/**
     * This method frees the {@code SeriableArray} object and releases the
     * resources that it holds. The object is invalid once the {@code free}
     * method is called. <p> If {@code free} is called multiple times, the
     * subsequent calls to {@code free} are treated as a no-op. </P>
     *
     * @throws SQLException if an error occurs releasing the SerialArray's resources
     * @since 1.6
     */
    public void free() throws SQLException {
        if (elements != null) {
            elements = null;
            baseTypeName= null;
        }
    }

    Constructs a new SerialArray object from the given
Array object.

This constructor does not do custom mapping.  If the base type of the array
is an SQL structured type and custom mapping is desired, the constructor
SerialArray(Array array, Map map) should be used.

The new SerialArray
object contains the same elements as the Array object
from which it is built, except when the base type is the SQL type
BLOB,
CLOB, DATALINK or JAVA_OBJECT.
In this case, each element in the new
SerialArray object is the appropriate serialized form,
that is, a SerialBlob, SerialClob,
SerialDatalink, or SerialJavaObject object.

Note: (1) The Array object from which a SerialArray
object is created must have materialized the SQL ARRAY value's
data on the client before it is passed to the constructor.  Otherwise,
the new SerialArray object will contain no data.

Note: (2) The Array object supplied to this constructor cannot
return null for any Array.getArray() methods.
SerialArray cannot serialize null array values.
Params: array – the Array object to be serialized
Throws: SerialException – if an error occurs serializing the
    Array object
SQLException – if a database access error occurs or the
    array parameter is null./**
     * Constructs a new <code>SerialArray</code> object from the given
     * <code>Array</code> object.
     * <P>
     * This constructor does not do custom mapping.  If the base type of the array
     * is an SQL structured type and custom mapping is desired, the constructor
     * <code>SerialArray(Array array, Map map)</code> should be used.
     * <P>
     * The new <code>SerialArray</code>
     * object contains the same elements as the <code>Array</code> object
     * from which it is built, except when the base type is the SQL type
     * <code>BLOB</code>,
     * <code>CLOB</code>, <code>DATALINK</code> or <code>JAVA_OBJECT</code>.
     * In this case, each element in the new
     * <code>SerialArray</code> object is the appropriate serialized form,
     * that is, a <code>SerialBlob</code>, <code>SerialClob</code>,
     * <code>SerialDatalink</code>, or <code>SerialJavaObject</code> object.
     * <P>
     * Note: (1) The <code>Array</code> object from which a <code>SerialArray</code>
     * object is created must have materialized the SQL <code>ARRAY</code> value's
     * data on the client before it is passed to the constructor.  Otherwise,
     * the new <code>SerialArray</code> object will contain no data.
     * <p>
     * Note: (2) The <code>Array</code> object supplied to this constructor cannot
     * return <code>null</code> for any <code>Array.getArray()</code> methods.
     * <code>SerialArray</code> cannot serialize <code>null</code> array values.
     *
     * @param array the <code>Array</code> object to be serialized
     * @throws SerialException if an error occurs serializing the
     *     <code>Array</code> object
     * @throws SQLException if a database access error occurs or the
     *     <i>array</i> parameter is <code>null</code>.
     */
     public SerialArray(Array array) throws SerialException, SQLException {
         if (array == null) {
             throw new SQLException("Cannot instantiate a SerialArray " +
                 "object with a null Array object");
         }

         if ((elements = (Object[])array.getArray()) == null) {
             throw new SQLException("Invalid Array object. Calls to Array.getArray() " +
                 "return null value which cannot be serialized");
         }

         //elements = (Object[])array.getArray();
         baseType = array.getBaseType();
         baseTypeName = array.getBaseTypeName();
         len = elements.length;

        switch (baseType) {

        case java.sql.Types.BLOB:
            for (int i = 0; i < len; i++) {
                elements[i] = new SerialBlob((Blob)elements[i]);
            }
            break;

        case java.sql.Types.CLOB:
            for (int i = 0; i < len; i++) {
                elements[i] = new SerialClob((Clob)elements[i]);
            }
            break;

        case java.sql.Types.DATALINK:
            for (int i = 0; i < len; i++) {
                elements[i] = new SerialDatalink((URL)elements[i]);
            }
            break;

        case java.sql.Types.JAVA_OBJECT:
            for (int i = 0; i < len; i++) {
                elements[i] = new SerialJavaObject(elements[i]);
            }
            break;

        }


    }

    Returns a new array that is a copy of this SerialArray
object.
Throws: SerialException – if an error occurs; if free had previously been called on this object
Returns: a copy of this SerialArray object as an
        Object in the Java programming language/**
     * Returns a new array that is a copy of this <code>SerialArray</code>
     * object.
     *
     * @return a copy of this <code>SerialArray</code> object as an
     *         <code>Object</code> in the Java programming language
     * @throws SerialException if an error occurs;
     * if {@code free} had previously been called on this object
     */
    public Object getArray() throws SerialException {
        isValid();
        Object dst = new Object[len];
        System.arraycopy((Object)elements, 0, dst, 0, len);
        return dst;
    }

 //[if an error occurstype map used??]
    Returns a new array that is a copy of this SerialArray
object, using the given type map for the custom
mapping of each element when the elements are SQL UDTs.

This method does custom mapping if the array elements are a UDT
and the given type map has an entry for that UDT.
Custom mapping is recursive,
meaning that if, for instance, an element of an SQL structured type
is an SQL structured type that itself has an element that is an SQL
structured type, each structured type that has a custom mapping will be
mapped according to the given type map.
Params: map – a java.util.Map object in which
       each entry consists of 1) a String object
       giving the fully qualified name of a UDT and 2) the
       Class object for the SQLData implementation
       that defines how the UDT is to be mapped
Throws: SerialException – if an error occurs; if free had previously been called on this object
Returns: a copy of this SerialArray object as an
        Object in the Java programming language/**
     * Returns a new array that is a copy of this <code>SerialArray</code>
     * object, using the given type map for the custom
     * mapping of each element when the elements are SQL UDTs.
     * <P>
     * This method does custom mapping if the array elements are a UDT
     * and the given type map has an entry for that UDT.
     * Custom mapping is recursive,
     * meaning that if, for instance, an element of an SQL structured type
     * is an SQL structured type that itself has an element that is an SQL
     * structured type, each structured type that has a custom mapping will be
     * mapped according to the given type map.
     *
     * @param map a <code>java.util.Map</code> object in which
     *        each entry consists of 1) a <code>String</code> object
     *        giving the fully qualified name of a UDT and 2) the
     *        <code>Class</code> object for the <code>SQLData</code> implementation
     *        that defines how the UDT is to be mapped
     * @return a copy of this <code>SerialArray</code> object as an
     *         <code>Object</code> in the Java programming language
     * @throws SerialException if an error occurs;
     * if {@code free} had previously been called on this object
     */
    public Object getArray(Map<String, Class<?>> map) throws SerialException {
        isValid();
        Object dst[] = new Object[len];
        System.arraycopy((Object)elements, 0, dst, 0, len);
        return dst;
    }

    Returns a new array that is a copy of a slice
of this SerialArray object, starting with the
element at the given index and containing the given number
of consecutive elements.
Params: index – the index into this SerialArray object
             of the first element to be copied;
             the index of the first element is 0
count – the number of consecutive elements to be copied, starting
             at the given index
Throws: SerialException – if an error occurs; if free had previously been called on this object
Returns: a copy of the designated elements in this SerialArray
        object as an Object in the Java programming language/**
     * Returns a new array that is a copy of a slice
     * of this <code>SerialArray</code> object, starting with the
     * element at the given index and containing the given number
     * of consecutive elements.
     *
     * @param index the index into this <code>SerialArray</code> object
     *              of the first element to be copied;
     *              the index of the first element is <code>0</code>
     * @param count the number of consecutive elements to be copied, starting
     *              at the given index
     * @return a copy of the designated elements in this <code>SerialArray</code>
     *         object as an <code>Object</code> in the Java programming language
     * @throws SerialException if an error occurs;
     * if {@code free} had previously been called on this object
     */
    public Object getArray(long index, int count) throws SerialException {
        isValid();
        Object dst = new Object[count];
        System.arraycopy((Object)elements, (int)index, dst, 0, count);
        return dst;
    }

    Returns a new array that is a copy of a slice
of this SerialArray object, starting with the
element at the given index and containing the given number
of consecutive elements.

This method does custom mapping if the array elements are a UDT
and the given type map has an entry for that UDT.
Custom mapping is recursive,
meaning that if, for instance, an element of an SQL structured type
is an SQL structured type that itself has an element that is an SQL
structured type, each structured type that has a custom mapping will be
mapped according to the given type map.
Params: index – the index into this SerialArray object
             of the first element to be copied; the index of the
             first element in the array is 0
count – the number of consecutive elements to be copied, starting
             at the given index
map – a java.util.Map object in which
       each entry consists of 1) a String object
       giving the fully qualified name of a UDT and 2) the
       Class object for the SQLData implementation
       that defines how the UDT is to be mapped
Throws: SerialException – if an error occurs; if free had previously been called on this object
Returns: a copy of the designated elements in this SerialArray
        object as an Object in the Java programming language/**
     * Returns a new array that is a copy of a slice
     * of this <code>SerialArray</code> object, starting with the
     * element at the given index and containing the given number
     * of consecutive elements.
     * <P>
     * This method does custom mapping if the array elements are a UDT
     * and the given type map has an entry for that UDT.
     * Custom mapping is recursive,
     * meaning that if, for instance, an element of an SQL structured type
     * is an SQL structured type that itself has an element that is an SQL
     * structured type, each structured type that has a custom mapping will be
     * mapped according to the given type map.
     *
     * @param index the index into this <code>SerialArray</code> object
     *              of the first element to be copied; the index of the
     *              first element in the array is <code>0</code>
     * @param count the number of consecutive elements to be copied, starting
     *              at the given index
     * @param map a <code>java.util.Map</code> object in which
     *        each entry consists of 1) a <code>String</code> object
     *        giving the fully qualified name of a UDT and 2) the
     *        <code>Class</code> object for the <code>SQLData</code> implementation
     *        that defines how the UDT is to be mapped
     * @return a copy of the designated elements in this <code>SerialArray</code>
     *         object as an <code>Object</code> in the Java programming language
     * @throws SerialException if an error occurs;
     * if {@code free} had previously been called on this object
     */
    public Object getArray(long index, int count, Map<String,Class<?>> map)
        throws SerialException
    {
        isValid();
        Object dst = new Object[count];
        System.arraycopy((Object)elements, (int)index, dst, 0, count);
        return dst;
    }

    Retrieves the SQL type of the elements in this SerialArray
object.  The int returned is one of the constants in the class
java.sql.Types.
Throws: SerialException – if an error occurs; if free had previously been called on this object
Returns: one of the constants in java.sql.Types, indicating
        the SQL type of the elements in this SerialArray object/**
     * Retrieves the SQL type of the elements in this <code>SerialArray</code>
     * object.  The <code>int</code> returned is one of the constants in the class
     * <code>java.sql.Types</code>.
     *
     * @return one of the constants in <code>java.sql.Types</code>, indicating
     *         the SQL type of the elements in this <code>SerialArray</code> object
     * @throws SerialException if an error occurs;
     * if {@code free} had previously been called on this object
     */
    public int getBaseType() throws SerialException {
        isValid();
        return baseType;
    }

    Retrieves the DBMS-specific type name for the elements in this
SerialArray object.
Throws: SerialException – if an error occurs; if free had previously been called on this object
Returns: the SQL type name used by the DBMS for the base type of this
        SerialArray object/**
     * Retrieves the DBMS-specific type name for the elements in this
     * <code>SerialArray</code> object.
     *
     * @return the SQL type name used by the DBMS for the base type of this
     *         <code>SerialArray</code> object
     * @throws SerialException if an error occurs;
     * if {@code free} had previously been called on this object
     */
    public String getBaseTypeName() throws SerialException {
        isValid();
        return baseTypeName;
    }

    Retrieves a ResultSet object holding the elements of
the subarray that starts at
index index and contains up to count successive elements.
This method uses the connection's type map to map the elements of
the array if the map contains
an entry for the base type. Otherwise, the standard mapping is used.
Params: index – the index into this SerialArray object
        of the first element to be copied; the index of the
        first element in the array is 0
count – the number of consecutive elements to be copied, starting
        at the given index
Throws: SerialException – if called with the cause set to UnsupportedOperationException
Returns: a ResultSet object containing the designated
        elements in this SerialArray object, with a
        separate row for each element/**
     * Retrieves a <code>ResultSet</code> object holding the elements of
     * the subarray that starts at
     * index <i>index</i> and contains up to <i>count</i> successive elements.
     * This method uses the connection's type map to map the elements of
     * the array if the map contains
     * an entry for the base type. Otherwise, the standard mapping is used.
     *
     * @param index the index into this <code>SerialArray</code> object
     *         of the first element to be copied; the index of the
     *         first element in the array is <code>0</code>
     * @param count the number of consecutive elements to be copied, starting
     *         at the given index
     * @return a <code>ResultSet</code> object containing the designated
     *         elements in this <code>SerialArray</code> object, with a
     *         separate row for each element
     * @throws SerialException if called with the cause set to
     *         {@code UnsupportedOperationException}
     */
    public ResultSet getResultSet(long index, int count) throws SerialException {
        SerialException se = new SerialException();
        se.initCause(new UnsupportedOperationException());
        throw  se;
    }

    Retrieves a ResultSet object that contains all of
the elements of the SQL ARRAY
value represented by this SerialArray object. This method uses
the specified map for type map customizations unless the base type of the
array does not match a user-defined type (UDT) in map, in
which case it uses the
standard mapping. This version of the method getResultSet
uses either the given type map or the standard mapping; it never uses the
type map associated with the connection.
Params: map – a java.util.Map object in which
       each entry consists of 1) a String object
       giving the fully qualified name of a UDT and 2) the
       Class object for the SQLData implementation
       that defines how the UDT is to be mapped
Throws: SerialException – if called with the cause set to UnsupportedOperationException
Returns: a ResultSet object containing all of the
        elements in this SerialArray object, with a
        separate row for each element/**
     *
     * Retrieves a <code>ResultSet</code> object that contains all of
     * the elements of the SQL <code>ARRAY</code>
     * value represented by this <code>SerialArray</code> object. This method uses
     * the specified map for type map customizations unless the base type of the
     * array does not match a user-defined type (UDT) in <i>map</i>, in
     * which case it uses the
     * standard mapping. This version of the method <code>getResultSet</code>
     * uses either the given type map or the standard mapping; it never uses the
     * type map associated with the connection.
     *
     * @param map a <code>java.util.Map</code> object in which
     *        each entry consists of 1) a <code>String</code> object
     *        giving the fully qualified name of a UDT and 2) the
     *        <code>Class</code> object for the <code>SQLData</code> implementation
     *        that defines how the UDT is to be mapped
     * @return a <code>ResultSet</code> object containing all of the
     *         elements in this <code>SerialArray</code> object, with a
     *         separate row for each element
     * @throws SerialException if called with the cause set to
     *         {@code UnsupportedOperationException}
     */
    public ResultSet getResultSet(Map<String, Class<?>> map)
        throws SerialException
    {
        SerialException se = new SerialException();
        se.initCause(new UnsupportedOperationException());
        throw  se;
    }

    Retrieves a ResultSet object that contains all of
the elements in the ARRAY value that this
SerialArray object represents.
If appropriate, the elements of the array are mapped using the connection's
type map; otherwise, the standard mapping is used.
Throws: SerialException – if called with the cause set to UnsupportedOperationException
Returns: a ResultSet object containing all of the
        elements in this SerialArray object, with a
        separate row for each element/**
     * Retrieves a <code>ResultSet</code> object that contains all of
     * the elements in the <code>ARRAY</code> value that this
     * <code>SerialArray</code> object represents.
     * If appropriate, the elements of the array are mapped using the connection's
     * type map; otherwise, the standard mapping is used.
     *
     * @return a <code>ResultSet</code> object containing all of the
     *         elements in this <code>SerialArray</code> object, with a
     *         separate row for each element
     * @throws SerialException if called with the cause set to
     *         {@code UnsupportedOperationException}
     */
    public ResultSet getResultSet() throws SerialException {
        SerialException se = new SerialException();
        se.initCause(new UnsupportedOperationException());
        throw  se;
    }


    Retrieves a result set holding the elements of the subarray that starts at
Retrieves a ResultSet object that contains a subarray of the
elements in this SerialArray object, starting at
index index and containing up to count successive
elements. This method uses
the specified map for type map customizations unless the base type of the
array does not match a user-defined type (UDT) in map, in
which case it uses the
standard mapping. This version of the method getResultSet uses
either the given type map or the standard mapping; it never uses the type
map associated with the connection.
Params: index – the index into this SerialArray object
             of the first element to be copied; the index of the
             first element in the array is 0
count – the number of consecutive elements to be copied, starting
             at the given index
map – a java.util.Map object in which
       each entry consists of 1) a String object
       giving the fully qualified name of a UDT and 2) the
       Class object for the SQLData implementation
       that defines how the UDT is to be mapped
Throws: SerialException – if called with the cause set to UnsupportedOperationException
Returns: a ResultSet object containing the designated
        elements in this SerialArray object, with a
        separate row for each element/**
     * Retrieves a result set holding the elements of the subarray that starts at
     * Retrieves a <code>ResultSet</code> object that contains a subarray of the
     * elements in this <code>SerialArray</code> object, starting at
     * index <i>index</i> and containing up to <i>count</i> successive
     * elements. This method uses
     * the specified map for type map customizations unless the base type of the
     * array does not match a user-defined type (UDT) in <i>map</i>, in
     * which case it uses the
     * standard mapping. This version of the method <code>getResultSet</code> uses
     * either the given type map or the standard mapping; it never uses the type
     * map associated with the connection.
     *
     * @param index the index into this <code>SerialArray</code> object
     *              of the first element to be copied; the index of the
     *              first element in the array is <code>0</code>
     * @param count the number of consecutive elements to be copied, starting
     *              at the given index
     * @param map a <code>java.util.Map</code> object in which
     *        each entry consists of 1) a <code>String</code> object
     *        giving the fully qualified name of a UDT and 2) the
     *        <code>Class</code> object for the <code>SQLData</code> implementation
     *        that defines how the UDT is to be mapped
     * @return a <code>ResultSet</code> object containing the designated
     *         elements in this <code>SerialArray</code> object, with a
     *         separate row for each element
     * @throws SerialException if called with the cause set to
     *         {@code UnsupportedOperationException}
     */
    public ResultSet getResultSet(long index, int count,
                                  Map<String,Class<?>> map)
        throws SerialException
    {
        SerialException se = new SerialException();
        se.initCause(new UnsupportedOperationException());
        throw  se;
    }


    Compares this SerialArray to the specified object. The result is 
true if and only if the argument is not null and is a 
SerialArray object whose elements are identical to this object's elements 
Params: obj – The object to compare this SerialArray against
Returns:  true if the given object represents a SerialArray equivalent to this SerialArray, false otherwise/**
     * Compares this SerialArray to the specified object.  The result is {@code
     * true} if and only if the argument is not {@code null} and is a {@code
     * SerialArray} object whose elements are identical to this object's elements
     *
     * @param  obj The object to compare this {@code SerialArray} against
     *
     * @return  {@code true} if the given object represents a {@code SerialArray}
     *          equivalent to this SerialArray, {@code false} otherwise
     *
     */
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }

        if (obj instanceof SerialArray) {
            SerialArray sa = (SerialArray)obj;
            return baseType == sa.baseType &&
                    baseTypeName.equals(sa.baseTypeName) &&
                    Arrays.equals(elements, sa.elements);
        }
        return false;
    }

    Returns a hash code for this SerialArray. The hash code for a SerialArray object is computed using the hash codes of the elements of the SerialArray object 
Returns:  a hash code value for this object./**
     * Returns a hash code for this SerialArray. The hash code for a
     * {@code SerialArray} object is computed using the hash codes
     * of the elements of the  {@code SerialArray} object
     *
     * @return  a hash code value for this object.
     */
    public int hashCode() {
        return (((31 + Arrays.hashCode(elements)) * 31 + len)  * 31 +
                baseType) * 31 + baseTypeName.hashCode();
    }

    Returns a clone of this SerialArray. The copy will contain a reference to a clone of the underlying objects array, not a reference to the original underlying object array of this SerialArray object. 
Returns: a clone of this SerialArray/**
     * Returns a clone of this {@code SerialArray}. The copy will contain a
     * reference to a clone of the underlying objects array, not a reference
     * to the original underlying object array of this {@code SerialArray} object.
     *
     * @return a clone of this SerialArray
     */
    public Object clone() {
        try {
            SerialArray sa = (SerialArray) super.clone();
            sa.elements = (elements != null) ? Arrays.copyOf(elements, len) : null;
            return sa;
        } catch (CloneNotSupportedException ex) {
            // this shouldn't happen, since we are Cloneable
            throw new InternalError();
        }

    }

    readObject is called to restore the state of the SerialArray from a stream. /**
     * readObject is called to restore the state of the {@code SerialArray} from
     * a stream.
     */
    private void readObject(ObjectInputStream s)
            throws IOException, ClassNotFoundException {

       ObjectInputStream.GetField fields = s.readFields();
       Object[] tmp = (Object[])fields.get("elements", null);
       if (tmp == null)
           throw new InvalidObjectException("elements is null and should not be!");
       elements = tmp.clone();
       len = fields.get("len", 0);
       if(elements.length != len)
           throw new InvalidObjectException("elements is not the expected size");

       baseType = fields.get("baseType", 0);
       baseTypeName = (String)fields.get("baseTypeName", null);
    }

    writeObject is called to save the state of the SerialArray to a stream. /**
     * writeObject is called to save the state of the {@code SerialArray}
     * to a stream.
     */
    private void writeObject(ObjectOutputStream s)
            throws IOException, ClassNotFoundException {

        ObjectOutputStream.PutField fields = s.putFields();
        fields.put("elements", elements);
        fields.put("len", len);
        fields.put("baseType", baseType);
        fields.put("baseTypeName", baseTypeName);
        s.writeFields();
    }

    Check to see if this object had previously had its free method called 
Throws: SerialException – /**
     * Check to see if this object had previously had its {@code free} method
     * called
     *
     * @throws SerialException
     */
    private void isValid() throws SerialException {
        if (elements == null) {
            throw new SerialException("Error: You cannot call a method on a "
                    + "SerialArray instance once free() has been called.");
        }
    }

    The identifier that assists in the serialization of this SerialArray
object.
/**
     * The identifier that assists in the serialization of this <code>SerialArray</code>
     * object.
     */
    static final long serialVersionUID = -8466174297270688520L;
}
Throws:	SQLException – if an error occurs releasing the SerialArray's resources
Since:	1.6
Params:	array – the `Array` object to be serialized
Throws:	SerialException – if an error occurs serializing the `Array` object SQLException – if a database access error occurs or the array parameter is `null`.
Throws:	SerialException – if an error occurs; if `free` had previously been called on this object
Returns:	a copy of this `SerialArray` object as an `Object` in the Java programming language
Params:	map – a `java.util.Map` object in which each entry consists of 1) a `String` object giving the fully qualified name of a UDT and 2) the `Class` object for the `SQLData` implementation that defines how the UDT is to be mapped
Throws:	SerialException – if an error occurs; if `free` had previously been called on this object
Returns:	a copy of this `SerialArray` object as an `Object` in the Java programming language
Params:	index – the index into this `SerialArray` object of the first element to be copied; the index of the first element is `0` count – the number of consecutive elements to be copied, starting at the given index
Throws:	SerialException – if an error occurs; if `free` had previously been called on this object
Returns:	a copy of the designated elements in this `SerialArray` object as an `Object` in the Java programming language
Throws:	SerialException – if called with the cause set to `UnsupportedOperationException`
Returns:	a `ResultSet` object containing all of the elements in this `SerialArray` object, with a separate row for each element
Params:	obj – The object to compare this `SerialArray` against
Returns:	`true` if the given object represents a `SerialArray` equivalent to this SerialArray, `false` otherwise
/

java/ 8/ javax/sql/rowset/serial/SerialArray.java

Thread safety
