java/15 : java.xml/javax/xml/transform/TransformerException.java

TransformerException
https://openjdk.java.net/
GPLv2 + Classpath Exception
/*
 * Copyright (c) 2000, 2017, 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
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package javax.xml.transform;

import java.lang.reflect.Method;
import java.lang.reflect.InvocationTargetException;
import java.security.AccessControlContext;
import java.security.AccessController;
import java.security.CodeSigner;
import java.security.CodeSource;
import java.security.PermissionCollection;
import java.security.Permissions;
import java.security.PrivilegedAction;
import java.security.ProtectionDomain;
import java.util.Objects;

This class specifies an exceptional condition that occurred
during the transformation process.
Since: 1.4/**
 * This class specifies an exceptional condition that occurred
 * during the transformation process.
 *
 * @since 1.4
 */
public class TransformerException extends Exception {

    private static final long serialVersionUID = 975798773772956428L;

    Field locator specifies where the error occurred /** Field locator specifies where the error occurred */
    SourceLocator locator;

    Method getLocator retrieves an instance of a SourceLocator
object that specifies where an error occurred.
Returns: A SourceLocator object, or null if none was specified./**
     * Method getLocator retrieves an instance of a SourceLocator
     * object that specifies where an error occurred.
     *
     * @return A SourceLocator object, or null if none was specified.
     */
    public SourceLocator getLocator() {
        return this.locator;
    }

    Method setLocator sets an instance of a SourceLocator
object that specifies where an error occurred.
Params: location – A SourceLocator object, or null to clear the location./**
     * Method setLocator sets an instance of a SourceLocator
     * object that specifies where an error occurred.
     *
     * @param location A SourceLocator object, or null to clear the location.
     */
    public void setLocator(SourceLocator location) {
        this.locator = location;
    }

    Field containedException specifies a wrapped exception.  May be null. /** Field containedException specifies a wrapped exception.  May be null. */
    Throwable containedException;

    This method retrieves an exception that this exception wraps.
See Also: getCause
Returns: An Throwable object, or null./**
     * This method retrieves an exception that this exception wraps.
     *
     * @return An Throwable object, or null.
     * @see #getCause
     */
    public Throwable getException() {
        return containedException;
    }

    Returns the cause of this throwable or null if the
cause is nonexistent or unknown.  (The cause is the throwable that
caused this throwable to get thrown.)
Returns: the cause, or null if unknown/**
     * Returns the cause of this throwable or <code>null</code> if the
     * cause is nonexistent or unknown.  (The cause is the throwable that
     * caused this throwable to get thrown.)
     * @return the cause, or null if unknown
     */
    @Override
    public Throwable getCause() {

        return ((containedException == this)
                ? null
                : containedException);
    }

    Initializes the cause of this throwable to the specified value.
(The cause is the throwable that caused this throwable to get thrown.)
This method can be called at most once. It is generally called from within the constructor, or immediately after creating the throwable. If this throwable was created with TransformerException(Throwable) or TransformerException(String, Throwable), this method cannot be called even once. 
Params: cause – the cause (which is saved for later retrieval by the getCause() method). (A null value is
        permitted, and indicates that the cause is nonexistent or
        unknown.)
Throws: IllegalArgumentException – if cause is this
        throwable.  (A throwable cannot
        be its own cause.)
IllegalStateException – if this throwable was created with TransformerException(Throwable) or TransformerException(String, Throwable), or this method has already been called on this throwable.
Returns:  a reference to this Throwable instance./**
     * Initializes the <i>cause</i> of this throwable to the specified value.
     * (The cause is the throwable that caused this throwable to get thrown.)
     *
     * <p>This method can be called at most once.  It is generally called from
     * within the constructor, or immediately after creating the
     * throwable.  If this throwable was created
     * with {@link #TransformerException(Throwable)} or
     * {@link #TransformerException(String,Throwable)}, this method cannot be called
     * even once.
     *
     * @param  cause the cause (which is saved for later retrieval by the
     *         {@link #getCause()} method).  (A <code>null</code> value is
     *         permitted, and indicates that the cause is nonexistent or
     *         unknown.)
     * @return  a reference to this <code>Throwable</code> instance.
     * @throws IllegalArgumentException if <code>cause</code> is this
     *         throwable.  (A throwable cannot
     *         be its own cause.)
     * @throws IllegalStateException if this throwable was
     *         created with {@link #TransformerException(Throwable)} or
     *         {@link #TransformerException(String,Throwable)}, or this method has already
     *         been called on this throwable.
     */
    @Override
    public synchronized Throwable initCause(Throwable cause) {

        // TransformerException doesn't set its cause (probably
        // because it predates initCause()) - and we may not want
        // to change this since Exceptions are serializable...
        // But this also leads to the broken code in printStackTrace
        // below...

        if (this.containedException != null) {
            throw new IllegalStateException("Can't overwrite cause");
        }

        if (cause == this) {
            throw new IllegalArgumentException(
                "Self-causation not permitted");
        }

        this.containedException = cause;

        return this;
    }

    Create a new TransformerException.
Params: message – The error or warning message./**
     * Create a new TransformerException.
     *
     * @param message The error or warning message.
     */
    public TransformerException(String message) {
        this(message, null, null);
    }

    Create a new TransformerException wrapping an existing exception.
Params: e – The exception to be wrapped./**
     * Create a new TransformerException wrapping an existing exception.
     *
     * @param e The exception to be wrapped.
     */
    public TransformerException(Throwable e) {
        this(null, null, e);
    }

    Wrap an existing exception in a TransformerException.
This is used for throwing processor exceptions before
the processing has started.
Params: message – The error or warning message, or null to
               use the message from the embedded exception.
e – Any exception/**
     * Wrap an existing exception in a TransformerException.
     *
     * <p>This is used for throwing processor exceptions before
     * the processing has started.</p>
     *
     * @param message The error or warning message, or null to
     *                use the message from the embedded exception.
     * @param e Any exception
     */
    public TransformerException(String message, Throwable e) {
        this(message, null, e);
    }

    Create a new TransformerException from a message and a Locator.
This constructor is especially useful when an application is
creating its own exception from within a DocumentHandler
callback.
Params: message – The error or warning message.
locator – The locator object for the error or warning./**
     * Create a new TransformerException from a message and a Locator.
     *
     * <p>This constructor is especially useful when an application is
     * creating its own exception from within a DocumentHandler
     * callback.</p>
     *
     * @param message The error or warning message.
     * @param locator The locator object for the error or warning.
     */
    public TransformerException(String message, SourceLocator locator) {
        this(message, locator, null);
    }

    Wrap an existing exception in a TransformerException.
Params: message – The error or warning message, or null to
               use the message from the embedded exception.
locator – The locator object for the error or warning.
e – Any exception/**
     * Wrap an existing exception in a TransformerException.
     *
     * @param message The error or warning message, or null to
     *                use the message from the embedded exception.
     * @param locator The locator object for the error or warning.
     * @param e Any exception
     */
    public TransformerException(String message, SourceLocator locator,
                                Throwable e) {
        super(((message == null) || (message.length() == 0))
              ? ((e == null) ? "" : e.toString())
              : message);

        this.containedException = e;
        this.locator            = locator;
    }

    Get the error message with location information
appended.
Returns: A String representing the error message with
        location information appended./**
     * Get the error message with location information
     * appended.
     *
     * @return A <code>String</code> representing the error message with
     *         location information appended.
     */
    public String getMessageAndLocation() {
        StringBuilder sbuffer = new StringBuilder();
        sbuffer.append(Objects.toString(super.getMessage(), ""));
        sbuffer.append(Objects.toString(getLocationAsString(), ""));

        return sbuffer.toString();
    }

    Get the location information as a string.
Returns: A string with location info, or null
if there is no location information./**
     * Get the location information as a string.
     *
     * @return A string with location info, or null
     * if there is no location information.
     */
    public String getLocationAsString() {
        if (locator == null) {
            return null;
        }

        if (System.getSecurityManager() == null) {
            return getLocationString();
        } else {
            return AccessController.doPrivileged((PrivilegedAction<String>) () ->
                getLocationString(),
                new AccessControlContext(new ProtectionDomain[] {getNonPrivDomain()}));
        }
    }

    Constructs the location string.
Returns: the location string/**
     * Constructs the location string.
     * @return the location string
     */
    private String getLocationString() {
        if (locator == null) {
            return null;
        }

        StringBuilder sbuffer  = new StringBuilder();
            String       systemID = locator.getSystemId();
            int          line     = locator.getLineNumber();
            int          column   = locator.getColumnNumber();

            if (null != systemID) {
                sbuffer.append("; SystemID: ");
                sbuffer.append(systemID);
            }

            if (0 != line) {
                sbuffer.append("; Line#: ");
                sbuffer.append(line);
            }

            if (0 != column) {
                sbuffer.append("; Column#: ");
                sbuffer.append(column);
            }

            return sbuffer.toString();
    }

    Print the the trace of methods from where the error
originated.  This will trace all nested exception
objects, as well as this object.
/**
     * Print the the trace of methods from where the error
     * originated.  This will trace all nested exception
     * objects, as well as this object.
     */
    @Override
    public void printStackTrace() {
        printStackTrace(new java.io.PrintWriter(System.err, true));
    }

    Print the the trace of methods from where the error
originated.  This will trace all nested exception
objects, as well as this object.
Params: s – The stream where the dump will be sent to./**
     * Print the the trace of methods from where the error
     * originated.  This will trace all nested exception
     * objects, as well as this object.
     * @param s The stream where the dump will be sent to.
     */
    @Override
    public void printStackTrace(java.io.PrintStream s) {
        printStackTrace(new java.io.PrintWriter(s));
    }

    Print the the trace of methods from where the error
originated.  This will trace all nested exception
objects, as well as this object.
Params: s – The writer where the dump will be sent to./**
     * Print the the trace of methods from where the error
     * originated.  This will trace all nested exception
     * objects, as well as this object.
     * @param s The writer where the dump will be sent to.
     */
    @Override
    public void printStackTrace(java.io.PrintWriter s) {

        if (s == null) {
            s = new java.io.PrintWriter(System.err, true);
        }

        try {
            try {
                String locInfo = getLocationAsString();

                if (null != locInfo) {
                    s.println(locInfo);
                }

                super.printStackTrace(s);
            } catch (Throwable e) {}

            Throwable exception = getException();

            for (int i = 0; (i < 10) && (null != exception); i++) {
                s.println("---------");

                try {
                    exception.printStackTrace(s);
                    // if exception is a TransformerException it will print
                    // its contained exception, so we don't need to redo it here,
                    // and we can exit the loop now.
                    if (exception instanceof TransformerException) break;
                } catch (Throwable e) {
                    s.println("Could not print stack trace...");
                }

                try {
                    // Is this still needed?
                    Method meth = exception.getClass().getMethod("getException");

                    if (null != meth) {
                        Throwable prev = exception;

                        exception = (Throwable) meth.invoke(exception, (Object[]) null);

                        if (prev == exception) {
                            break;
                        }
                    } else {
                        exception = null;
                    }
                } catch (InvocationTargetException | IllegalAccessException
                        | NoSuchMethodException e) {
                    exception = null;
                }
            }
        } finally {
            // ensure output is written
            s.flush();
        }
    }

    Creates a ProtectionDomain that has no permission.
Returns: a ProtectionDomain/**
     * Creates a ProtectionDomain that has no permission.
     * @return a ProtectionDomain
     */
    private ProtectionDomain getNonPrivDomain() {
        CodeSource nullSource = new CodeSource(null, (CodeSigner[]) null);
        PermissionCollection noPermission = new Permissions();
        return new ProtectionDomain(nullSource, noPermission);
}
}
Params:	cause – the cause (which is saved for later retrieval by the `getCause()` method). (A `null` value is permitted, and indicates that the cause is nonexistent or unknown.)
Throws:	IllegalArgumentException – if `cause` is this throwable. (A throwable cannot be its own cause.) IllegalStateException – if this throwable was created with `TransformerException(Throwable)` or `TransformerException(String, Throwable)`, or this method has already been called on this throwable.
Returns:	a reference to this `Throwable` instance.
/

java/ 15/ java.xml/javax/xml/transform/TransformerException.java
