org.mozilla.javascript.RhinoException Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of rhino Show documentation
Show all versions of rhino Show documentation
Rhino is an open-source implementation of JavaScript written entirely in
Java. It is typically embedded into Java applications to provide
scripting to end users.
The newest version!
/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
package org.mozilla.javascript;
import java.io.CharArrayWriter;
import java.io.File;
import java.io.FilenameFilter;
import java.io.PrintStream;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* The class of exceptions thrown by the JavaScript engine.
*/
public abstract class RhinoException extends RuntimeException
{
RhinoException()
{
Evaluator e = Context.createInterpreter();
if (e != null)
e.captureStackInfo(this);
}
RhinoException(String details)
{
super(details);
Evaluator e = Context.createInterpreter();
if (e != null)
e.captureStackInfo(this);
}
@Override
public final String getMessage()
{
String details = details();
if (sourceName == null || lineNumber <= 0) {
return details;
}
StringBuffer buf = new StringBuffer(details);
buf.append(" (");
if (sourceName != null) {
buf.append(sourceName);
}
if (lineNumber > 0) {
buf.append('#');
buf.append(lineNumber);
}
buf.append(')');
return buf.toString();
}
public String details()
{
return super.getMessage();
}
/**
* Get the uri of the script source containing the error, or null
* if that information is not available.
*/
public final String sourceName()
{
return sourceName;
}
/**
* Initialize the uri of the script source containing the error.
*
* @param sourceName the uri of the script source responsible for the error.
* It should not be null.
*
* @throws IllegalStateException if the method is called more then once.
*/
public final void initSourceName(String sourceName)
{
if (sourceName == null) throw new IllegalArgumentException();
if (this.sourceName != null) throw new IllegalStateException();
this.sourceName = sourceName;
}
/**
* Returns the line number of the statement causing the error,
* or zero if not available.
*/
public final int lineNumber()
{
return lineNumber;
}
/**
* Initialize the line number of the script statement causing the error.
*
* @param lineNumber the line number in the script source.
* It should be positive number.
*
* @throws IllegalStateException if the method is called more then once.
*/
public final void initLineNumber(int lineNumber)
{
if (lineNumber <= 0) throw new IllegalArgumentException(String.valueOf(lineNumber));
if (this.lineNumber > 0) throw new IllegalStateException();
this.lineNumber = lineNumber;
}
/**
* The column number of the location of the error, or zero if unknown.
*/
public final int columnNumber()
{
return columnNumber;
}
/**
* Initialize the column number of the script statement causing the error.
*
* @param columnNumber the column number in the script source.
* It should be positive number.
*
* @throws IllegalStateException if the method is called more then once.
*/
public final void initColumnNumber(int columnNumber)
{
if (columnNumber <= 0) throw new IllegalArgumentException(String.valueOf(columnNumber));
if (this.columnNumber > 0) throw new IllegalStateException();
this.columnNumber = columnNumber;
}
/**
* The source text of the line causing the error, or null if unknown.
*/
public final String lineSource()
{
return lineSource;
}
/**
* Initialize the text of the source line containing the error.
*
* @param lineSource the text of the source line responsible for the error.
* It should not be null.
*
* @throws IllegalStateException if the method is called more then once.
*/
public final void initLineSource(String lineSource)
{
if (lineSource == null) throw new IllegalArgumentException();
if (this.lineSource != null) throw new IllegalStateException();
this.lineSource = lineSource;
}
final void recordErrorOrigin(String sourceName, int lineNumber,
String lineSource, int columnNumber)
{
// XXX: for compatibility allow for now -1 to mean 0
if (lineNumber == -1) {
lineNumber = 0;
}
if (sourceName != null) {
initSourceName(sourceName);
}
if (lineNumber != 0) {
initLineNumber(lineNumber);
}
if (lineSource != null) {
initLineSource(lineSource);
}
if (columnNumber != 0) {
initColumnNumber(columnNumber);
}
}
private String generateStackTrace()
{
// Get stable reference to work properly with concurrent access
CharArrayWriter writer = new CharArrayWriter();
super.printStackTrace(new PrintWriter(writer));
String origStackTrace = writer.toString();
Evaluator e = Context.createInterpreter();
if (e != null)
return e.getPatchedStack(this, origStackTrace);
return null;
}
/**
* Get a string representing the script stack of this exception.
* If optimization is enabled, this includes java stack elements
* whose source and method names suggest they have been generated
* by the Rhino script compiler.
* @return a script stack dump
* @since 1.6R6
*/
public String getScriptStackTrace()
{
StringBuilder buffer = new StringBuilder();
String lineSeparator = SecurityUtilities.getSystemProperty("line.separator");
ScriptStackElement[] stack = getScriptStack();
for (ScriptStackElement elem : stack) {
if (useMozillaStackStyle) {
elem.renderMozillaStyle(buffer);
} else {
elem.renderJavaStyle(buffer);
}
buffer.append(lineSeparator);
}
return buffer.toString();
}
/**
* Get a string representing the script stack of this exception.
* @deprecated the filter argument is ignored as we are able to
* recognize script stack elements by our own. Use
* #getScriptStackTrace() instead.
* @param filter ignored
* @return a script stack dump
* @since 1.6R6
*/
public String getScriptStackTrace(FilenameFilter filter)
{
return getScriptStackTrace();
}
/**
* Get the script stack of this exception as an array of
* {@link ScriptStackElement}s.
* If optimization is enabled, this includes java stack elements
* whose source and method names suggest they have been generated
* by the Rhino script compiler.
* @return the script stack for this exception
* @since 1.7R3
*/
public ScriptStackElement[] getScriptStack() {
List list = new ArrayList();
ScriptStackElement[][] interpreterStack = null;
if (interpreterStackInfo != null) {
Evaluator interpreter = Context.createInterpreter();
if (interpreter instanceof Interpreter)
interpreterStack = ((Interpreter) interpreter).getScriptStackElements(this);
}
int interpreterStackIndex = 0;
StackTraceElement[] stack = getStackTrace();
// Pattern to recover function name from java method name -
// see Codegen.getBodyMethodName()
// kudos to Marc Guillemot for coming up with this
Pattern pattern = Pattern.compile("_c_(.*)_\\d+");
for (StackTraceElement e : stack) {
String fileName = e.getFileName();
if (e.getMethodName().startsWith("_c_")
&& e.getLineNumber() > -1
&& fileName != null
&& !fileName.endsWith(".java")) {
String methodName = e.getMethodName();
Matcher match = pattern.matcher(methodName);
// the method representing the main script is always "_c_script_0" -
// at least we hope so
methodName = !"_c_script_0".equals(methodName) && match.find() ?
match.group(1) : null;
list.add(new ScriptStackElement(fileName, methodName, e.getLineNumber()));
} else if ("org.mozilla.javascript.Interpreter".equals(e.getClassName())
&& "interpretLoop".equals(e.getMethodName())
&& interpreterStack != null
&& interpreterStack.length > interpreterStackIndex) {
for (ScriptStackElement elem : interpreterStack[interpreterStackIndex++]) {
list.add(elem);
}
}
}
return list.toArray(new ScriptStackElement[list.size()]);
}
@Override
public void printStackTrace(PrintWriter s)
{
if (interpreterStackInfo == null) {
super.printStackTrace(s);
} else {
s.print(generateStackTrace());
}
}
@Override
public void printStackTrace(PrintStream s)
{
if (interpreterStackInfo == null) {
super.printStackTrace(s);
} else {
s.print(generateStackTrace());
}
}
/**
* Returns true if subclasses of RhinoException
* use the Mozilla/Firefox style of rendering script stacks
* (functionName()@fileName:lineNumber)
* instead of Rhino's own Java-inspired format
* ( at fileName:lineNumber (functionName)).
* @return true if stack is rendered in Mozilla/Firefox style
* @see ScriptStackElement
* @since 1.7R3
*/
public static boolean usesMozillaStackStyle() {
return useMozillaStackStyle;
}
/**
* Tell subclasses of RhinoException whether to
* use the Mozilla/Firefox style of rendering script stacks
* (functionName()@fileName:lineNumber)
* instead of Rhino's own Java-inspired format
* ( at fileName:lineNumber (functionName))
* @param flag whether to render stacks in Mozilla/Firefox style
* @see ScriptStackElement
* @since 1.7R3
*/
public static void useMozillaStackStyle(boolean flag) {
useMozillaStackStyle = flag;
}
static final long serialVersionUID = 1883500631321581169L;
private static boolean useMozillaStackStyle = false;
private String sourceName;
private int lineNumber;
private String lineSource;
private int columnNumber;
Object interpreterStackInfo;
int[] interpreterLineData;
}