/*******************************************************************************
* Copyright (c) 2009, 2011 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.jdt.internal.debug.core.breakpoints;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.IExtensionPoint;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Platform;
import org.eclipse.core.runtime.Status;
import org.eclipse.debug.core.DebugException;
import org.eclipse.jdt.core.dom.Message;
import org.eclipse.jdt.debug.core.IJavaBreakpoint;
import org.eclipse.jdt.debug.core.IJavaBreakpointListener;
import org.eclipse.jdt.debug.core.IJavaDebugTarget;
import org.eclipse.jdt.debug.core.IJavaLineBreakpoint;
import org.eclipse.jdt.debug.core.IJavaThread;
import org.eclipse.jdt.debug.core.IJavaType;
import org.eclipse.jdt.internal.debug.core.JDIDebugPlugin;
/**
* Manages breakpoint listener extensions.
*
* @since 3.5
*/
public class BreakpointListenerManager {
/**
* Map java breakpoint listeners by id
*/
private static Map<String, JavaBreakpointListenerProxy> fgJavaBreakpointListenersMap;
/**
* Global listeners
*/
private static IJavaBreakpointListener[] fgGlobalListeners;
private static final String VALUE_GLOBAL = "*"; //$NON-NLS-1$
private static final String ATTR_ID = "id"; //$NON-NLS-1$
private static final String ATTR_CLASS = "class"; //$NON-NLS-1$
private static final String ATTR_FILTER = "filter"; //$NON-NLS-1$
/**
* Proxy to a breakpoint listener
*/
private class JavaBreakpointListenerProxy implements
IJavaBreakpointListener {
private IConfigurationElement fConfigElement;
private IJavaBreakpointListener fDelegate;
public JavaBreakpointListenerProxy(IConfigurationElement element) {
fConfigElement = element;
}
/**
* Returns the underlying delegate or <code>null</code> if none/error
*
* @return breakpoint listener extension
*/
private synchronized IJavaBreakpointListener getDelegate() {
if (fDelegate == null) {
try {
fDelegate = (IJavaBreakpointListener) fConfigElement
.createExecutableExtension(ATTR_CLASS);
} catch (CoreException e) {
JDIDebugPlugin.log(e);
}
}
return fDelegate;
}
/*
* (non-Javadoc)
*
* @see
* org.eclipse.jdt.debug.core.IJavaBreakpointListener#addingBreakpoint
* (org.eclipse.jdt.debug.core.IJavaDebugTarget,
* org.eclipse.jdt.debug.core.IJavaBreakpoint)
*/
public void addingBreakpoint(IJavaDebugTarget target,
IJavaBreakpoint breakpoint) {
IJavaBreakpointListener delegate = getDelegate();
if (delegate != null) {
delegate.addingBreakpoint(target, breakpoint);
}
}
/**
* Whether this listener is for all breakpoints.
*
* @return whether for all breakpoints
*/
boolean isGlobal() {
String filter = fConfigElement.getAttribute(ATTR_FILTER);
if (filter != null && filter.equals(VALUE_GLOBAL)) {
return true;
}
return false;
}
/*
* (non-Javadoc)
*
* @see org.eclipse.jdt.debug.core.IJavaBreakpointListener#
* breakpointHasCompilationErrors
* (org.eclipse.jdt.debug.core.IJavaLineBreakpoint,
* org.eclipse.jdt.core.dom.Message[])
*/
public void breakpointHasCompilationErrors(
IJavaLineBreakpoint breakpoint, Message[] errors) {
IJavaBreakpointListener delegate = getDelegate();
if (delegate != null) {
delegate.breakpointHasCompilationErrors(breakpoint, errors);
}
}
/*
* (non-Javadoc)
*
* @see org.eclipse.jdt.debug.core.IJavaBreakpointListener#
* breakpointHasRuntimeException
* (org.eclipse.jdt.debug.core.IJavaLineBreakpoint,
* org.eclipse.debug.core.DebugException)
*/
public void breakpointHasRuntimeException(
IJavaLineBreakpoint breakpoint, DebugException exception) {
IJavaBreakpointListener delegate = getDelegate();
if (delegate != null) {
delegate.breakpointHasRuntimeException(breakpoint, exception);
}
}
/*
* (non-Javadoc)
*
* @see
* org.eclipse.jdt.debug.core.IJavaBreakpointListener#breakpointHit(
* org.eclipse.jdt.debug.core.IJavaThread,
* org.eclipse.jdt.debug.core.IJavaBreakpoint)
*/
public int breakpointHit(IJavaThread thread, IJavaBreakpoint breakpoint) {
IJavaBreakpointListener delegate = getDelegate();
if (delegate != null) {
return delegate.breakpointHit(thread, breakpoint);
}
return IJavaBreakpointListener.DONT_CARE;
}
/*
* (non-Javadoc)
*
* @see
* org.eclipse.jdt.debug.core.IJavaBreakpointListener#breakpointInstalled
* (org.eclipse.jdt.debug.core.IJavaDebugTarget,
* org.eclipse.jdt.debug.core.IJavaBreakpoint)
*/
public void breakpointInstalled(IJavaDebugTarget target,
IJavaBreakpoint breakpoint) {
IJavaBreakpointListener delegate = getDelegate();
if (delegate != null) {
delegate.breakpointInstalled(target, breakpoint);
}
}
/*
* (non-Javadoc)
*
* @see
* org.eclipse.jdt.debug.core.IJavaBreakpointListener#breakpointRemoved
* (org.eclipse.jdt.debug.core.IJavaDebugTarget,
* org.eclipse.jdt.debug.core.IJavaBreakpoint)
*/
public void breakpointRemoved(IJavaDebugTarget target,
IJavaBreakpoint breakpoint) {
IJavaBreakpointListener delegate = getDelegate();
if (delegate != null) {
delegate.breakpointRemoved(target, breakpoint);
}
}
/*
* (non-Javadoc)
*
* @see
* org.eclipse.jdt.debug.core.IJavaBreakpointListener#installingBreakpoint
* (org.eclipse.jdt.debug.core.IJavaDebugTarget,
* org.eclipse.jdt.debug.core.IJavaBreakpoint,
* org.eclipse.jdt.debug.core.IJavaType)
*/
public int installingBreakpoint(IJavaDebugTarget target,
IJavaBreakpoint breakpoint, IJavaType type) {
IJavaBreakpointListener delegate = getDelegate();
if (delegate != null) {
return delegate.installingBreakpoint(target, breakpoint, type);
}
return IJavaBreakpointListener.DONT_CARE;
}
}
/**
* Load extensions.
*/
private synchronized void init() {
if (fgJavaBreakpointListenersMap == null) {
fgJavaBreakpointListenersMap = new HashMap<String, JavaBreakpointListenerProxy>();
List<JavaBreakpointListenerProxy> global = new ArrayList<JavaBreakpointListenerProxy>();
IExtensionPoint extensionPoint = Platform
.getExtensionRegistry()
.getExtensionPoint(
JDIDebugPlugin.getUniqueIdentifier(),
JDIDebugPlugin.EXTENSION_POINT_JAVA_BREAKPOINT_LISTENERS);
IConfigurationElement[] actionDelegateElements = extensionPoint
.getConfigurationElements();
for (IConfigurationElement actionDelegateElement : actionDelegateElements) {
try {
String id = actionDelegateElement.getAttribute(ATTR_ID);
if (id == null)
throw new CoreException(
new Status(IStatus.ERROR, JDIDebugPlugin
.getUniqueIdentifier(),
"Java breakpoint listener requires an identifier attribute.")); //$NON-NLS-1$
JavaBreakpointListenerProxy listener = new JavaBreakpointListenerProxy(
actionDelegateElement);
fgJavaBreakpointListenersMap.put(id, listener);
if (listener.isGlobal()) {
global.add(listener);
}
} catch (CoreException e) {
JDIDebugPlugin.log(e);
}
}
fgGlobalListeners = global
.toArray(new IJavaBreakpointListener[global.size()]);
}
}
/**
* Returns the listener registered with the given identifier or
* <code>null</code> if none.
*
* @param id
* extension identifier
* @return breakpoint listener or <code>null</code>
*/
public IJavaBreakpointListener getBreakpointListener(String id) {
init();
return fgJavaBreakpointListenersMap.get(id);
}
/**
* Returns breakpoint listener extensions registered to listen for changes
* to all breakpoints.
*
* @return global listeners
*/
public IJavaBreakpointListener[] getGlobalListeners() {
init();
return fgGlobalListeners;
}
}