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/*
* Copyright 2000-2004 Apache Software Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package org.apache.tools.ant;
import java.io.PrintStream;
import java.io.PrintWriter;
/**
* Signals an error condition during a build
*
* @author James Duncan Davidson
*/
public class BuildException extends RuntimeException {
/** Exception that might have caused this one. */
private Throwable cause;
/** Location in the build file where the exception occurred */
private Location location = Location.UNKNOWN_LOCATION;
/**
* Constructs a build exception with no descriptive information.
*/
public BuildException() {
super();
}
/**
* Constructs an exception with the given descriptive message.
*
* @param message A description of or information about the exception.
* Should not be <code>null</code>.
*/
public BuildException(String message) {
super(message);
}
/**
* Constructs an exception with the given message and exception as
* a root cause.
*
* @param message A description of or information about the exception.
* Should not be <code>null</code> unless a cause is specified.
* @param cause The exception that might have caused this one.
* May be <code>null</code>.
*/
public BuildException(String message, Throwable cause) {
super(message);
this.cause = cause;
}
/**
* Constructs an exception with the given message and exception as
* a root cause and a location in a file.
*
* @param msg A description of or information about the exception.
* Should not be <code>null</code> unless a cause is specified.
* @param cause The exception that might have caused this one.
* May be <code>null</code>.
* @param location The location in the project file where the error
* occurred. Must not be <code>null</code>.
*/
public BuildException(String msg, Throwable cause, Location location) {
this(msg, cause);
this.location = location;
}
/**
* Constructs an exception with the given exception as a root cause.
*
* @param cause The exception that might have caused this one.
* Should not be <code>null</code>.
*/
public BuildException(Throwable cause) {
super(cause.toString());
this.cause = cause;
}
/**
* Constructs an exception with the given descriptive message and a
* location in a file.
*
* @param message A description of or information about the exception.
* Should not be <code>null</code>.
* @param location The location in the project file where the error
* occurred. Must not be <code>null</code>.
*/
public BuildException(String message, Location location) {
super(message);
this.location = location;
}
/**
* Constructs an exception with the given exception as
* a root cause and a location in a file.
*
* @param cause The exception that might have caused this one.
* Should not be <code>null</code>.
* @param location The location in the project file where the error
* occurred. Must not be <code>null</code>.
*/
public BuildException(Throwable cause, Location location) {
this(cause);
this.location = location;
}
/**
* Returns the nested exception, if any.
*
* @return the nested exception, or <code>null</code> if no
* exception is associated with this one
*/
public Throwable getException() {
return cause;
}
/**
* Returns the nested exception, if any.
*
* @return the nested exception, or <code>null</code> if no
* exception is associated with this one
*/
public Throwable getCause() {
return getException();
}
/**
* Returns the location of the error and the error message.
*
* @return the location of the error and the error message
*/
public String toString() {
return location.toString() + getMessage();
}
/**
* Sets the file location where the error occurred.
*
* @param location The file location where the error occurred.
* Must not be <code>null</code>.
*/
public void setLocation(Location location) {
this.location = location;
}
/**
* Returns the file location where the error occurred.
*
* @return the file location where the error occurred.
*/
public Location getLocation() {
return location;
}
/**
* Prints the stack trace for this exception and any
* nested exception to <code>System.err</code>.
*/
public void printStackTrace() {
printStackTrace(System.err);
}
/**
* Prints the stack trace of this exception and any nested
* exception to the specified PrintStream.
*
* @param ps The PrintStream to print the stack trace to.
* Must not be <code>null</code>.
*/
public void printStackTrace(PrintStream ps) {
synchronized (ps) {
super.printStackTrace(ps);
if (cause != null) {
ps.println("--- Nested Exception ---");
cause.printStackTrace(ps);
}
}
}
/**
* Prints the stack trace of this exception and any nested
* exception to the specified PrintWriter.
*
* @param pw The PrintWriter to print the stack trace to.
* Must not be <code>null</code>.
*/
public void printStackTrace(PrintWriter pw) {
synchronized (pw) {
super.printStackTrace(pw);
if (cause != null) {
pw.println("--- Nested Exception ---");
cause.printStackTrace(pw);
}
}
}
}
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