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package com.sun.rowset.internal;

import java.sql.*;
import java.io.*;
import java.util.Arrays;


The abstract base class from which the classes Row
The class BaseRow stores
a row's original values as an array of Object
values, which can be retrieved with the method getOrigRow.
This class also provides methods for getting and setting individual
values in the row.


A row's original values are the values it contained before it was last
modified.  For example, when the CachedRowSetmethod
acceptChanges is called, it will reset a row's original
values to be the row's current values.  Then, when the row is modified,
the values that were previously the current values will become the row's
original values (the values the row had immediately before it was modified).
If a row has not been modified, its original values are its initial values.


Subclasses of this class contain more specific details, such as
the conditions under which an exception is thrown or the bounds for
index parameters.

/**
 * The abstract base class from which the classes <code>Row</code>
 * The class <code>BaseRow</code> stores
 * a row's original values as an array of <code>Object</code>
 * values, which can be retrieved with the method <code>getOrigRow</code>.
 * This class also provides methods for getting and setting individual
 * values in the row.
 * <P>
 * A row's original values are the values it contained before it was last
 * modified.  For example, when the <code>CachedRowSet</code>method
 * <code>acceptChanges</code> is called, it will reset a row's original
 * values to be the row's current values.  Then, when the row is modified,
 * the values that were previously the current values will become the row's
 * original values (the values the row had immediately before it was modified).
 * If a row has not been modified, its original values are its initial values.
 * <P>
 * Subclasses of this class contain more specific details, such as
 * the conditions under which an exception is thrown or the bounds for
 * index parameters.
 */
public abstract class BaseRow implements Serializable, Cloneable {


Specify the serialVersionUID

/**
 * Specify the serialVersionUID
 */
private static final long serialVersionUID = 4152013523511412238L;


The array containing the original values for this BaseRow
object.

@serial
/**
 * The array containing the original values for this <code>BaseRow</code>
 * object.
 * @serial
 */
    protected Object[] origVals;


Retrieves the values that this row contained immediately
prior to its last modification.

Returns:an array of Object values containing this row's
original values
/**
 * Retrieves the values that this row contained immediately
 * prior to its last modification.
 *
 * @return an array of <code>Object</code> values containing this row's
 * original values
 */
    public Object[] getOrigRow() {
        Object[] origRow = this.origVals;
        return (origRow == null) ? null: Arrays.copyOf(origRow, origRow.length);
    }


Retrieves the array element at the given index, which is
the original value of column number idx in this row.

Params:
  • idx – the index of the element to return
Throws:
Returns:the Object value at the given index into this
        row's array of original values
/**
 * Retrieves the array element at the given index, which is
 * the original value of column number <i>idx</i> in this row.
 *
 * @param idx the index of the element to return
 * @return the <code>Object</code> value at the given index into this
 *         row's array of original values
 * @throws SQLException if there is an error
 */
    public abstract Object getColumnObject(int idx) throws SQLException;


Sets the element at the given index into this row's array of
original values to the given value.  Implementations of the classes
Row and determine what happens
when the cursor is on the insert row and when it is on any other row.

Params:
  • idx – the index of the element to be set
  • obj – the Object to which the element at index
             idx to be set
Throws:
/**
 * Sets the element at the given index into this row's array of
 * original values to the given value.  Implementations of the classes
 * <code>Row</code> and determine what happens
 * when the cursor is on the insert row and when it is on any other row.
 *
 * @param idx the index of the element to be set
 * @param obj the <code>Object</code> to which the element at index
 *              <code>idx</code> to be set
 * @throws SQLException if there is an error
 */
    public abstract void setColumnObject(int idx, Object obj) throws SQLException;
}