[r32x backport] Bug 293928 - Need ability to disable status handlers

diff --git a/org.eclipse.debug.core/META-INF/MANIFEST.MF b/org.eclipse.debug.core/META-INF/MANIFEST.MF
index f9f0693..74a6a82 100644
--- a/org.eclipse.debug.core/META-INF/MANIFEST.MF
+++ b/org.eclipse.debug.core/META-INF/MANIFEST.MF

@@ -2,7 +2,7 @@
 Bundle-ManifestVersion: 2
 Bundle-Name: %pluginName
 Bundle-SymbolicName: org.eclipse.debug.core; singleton:=true
-Bundle-Version: 3.2.1.qualifier
+Bundle-Version: 3.2.2.qualifier
 Bundle-ClassPath: .
 Bundle-Activator: org.eclipse.debug.core.DebugPlugin
 Bundle-Vendor: %providerName

diff --git a/org.eclipse.debug.core/core/org/eclipse/debug/core/DebugPlugin.java b/org.eclipse.debug.core/core/org/eclipse/debug/core/DebugPlugin.java
index a57e3ff..d429fab 100644
--- a/org.eclipse.debug.core/core/org/eclipse/debug/core/DebugPlugin.java
+++ b/org.eclipse.debug.core/core/org/eclipse/debug/core/DebugPlugin.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2000, 2006 IBM Corporation and others.
+ * Copyright (c) 2000, 2010 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
@@ -49,6 +49,7 @@
 import org.eclipse.debug.internal.core.BreakpointManager;
 import org.eclipse.debug.internal.core.DebugCoreMessages;
 import org.eclipse.debug.internal.core.ExpressionManager;
+import org.eclipse.debug.internal.core.IInternalDebugCoreConstants;
 import org.eclipse.debug.internal.core.LaunchManager;
 import org.eclipse.debug.internal.core.LogicalStructureManager;
 import org.eclipse.debug.internal.core.MemoryBlockManager;
@@ -501,6 +502,10 @@
 	 * @since 2.0
 	 */
 	public IStatusHandler getStatusHandler(IStatus status) {
+		boolean enabled = getPluginPreferences().getBoolean(IInternalDebugCoreConstants.PREF_ENABLE_STATUS_HANDLERS);
+		if (!enabled) {
+			return null;
+		}
 		StatusHandlerKey key = new StatusHandlerKey(status.getPlugin(), status.getCode());
 		if (fStatusHandlers == null) {
 			initializeStatusHandlers();

diff --git a/org.eclipse.debug.core/core/org/eclipse/debug/internal/core/DebugPreferenceInitializer.java b/org.eclipse.debug.core/core/org/eclipse/debug/internal/core/DebugPreferenceInitializer.java
new file mode 100644
index 0000000..f8da61a
--- /dev/null
+++ b/org.eclipse.debug.core/core/org/eclipse/debug/internal/core/DebugPreferenceInitializer.java

@@ -0,0 +1,30 @@
+/*******************************************************************************
+ * Copyright (c) 2010 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.debug.internal.core;
+
+import org.eclipse.core.runtime.Preferences;
+import org.eclipse.core.runtime.preferences.AbstractPreferenceInitializer;
+import org.eclipse.debug.core.DebugPlugin;
+
+/**
+ * Initializes preferences for debug.core
+ */
+public class DebugPreferenceInitializer extends AbstractPreferenceInitializer {
+
+	/* (non-Javadoc)
+	 * @see org.eclipse.core.runtime.preferences.AbstractPreferenceInitializer#initializeDefaultPreferences()
+	 */
+	public void initializeDefaultPreferences() {
+		Preferences prefs = DebugPlugin.getDefault().getPluginPreferences();
+		prefs.setDefault(IInternalDebugCoreConstants.PREF_ENABLE_STATUS_HANDLERS, true);
+	}
+
+}

diff --git a/org.eclipse.debug.core/core/org/eclipse/debug/internal/core/IInternalDebugCoreConstants.java b/org.eclipse.debug.core/core/org/eclipse/debug/internal/core/IInternalDebugCoreConstants.java
new file mode 100644
index 0000000..7b856ac
--- /dev/null
+++ b/org.eclipse.debug.core/core/org/eclipse/debug/internal/core/IInternalDebugCoreConstants.java

@@ -0,0 +1,27 @@
+/*******************************************************************************
+ * Copyright (c) 2010 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.debug.internal.core;
+
+import org.eclipse.debug.core.DebugPlugin;
+
+/**
+ * Contains constants to be used internally in all debug components
+ */
+public interface IInternalDebugCoreConstants {
+
+	/**
+	 * Boolean preference controlling whether status handler extensions
+	 * are enabled. Default value is <code>true</code>. When disabled
+	 * any call to {@link DebugPlugin#getStatusHandler(IStatus)} will return <code>null</code>.
+	 */
+	public static final String PREF_ENABLE_STATUS_HANDLERS = DebugPlugin.getUniqueIdentifier() + ".PREF_ENABLE_STATUS_HANDLERS"; //$NON-NLS-1$
+
+}

diff --git a/org.eclipse.debug.core/plugin.xml b/org.eclipse.debug.core/plugin.xml
index b661755..aafa101 100644
--- a/org.eclipse.debug.core/plugin.xml
+++ b/org.eclipse.debug.core/plugin.xml

@@ -159,6 +159,10 @@
             class="org.eclipse.debug.internal.core.sourcelookup.SourceLocatorMementoComparator"
             id="org.eclipse.debug.core.sourceLocatorMementoComparator">
       </launchConfigurationComparator>
+   </extension>
+   <extension
+         point="org.eclipse.core.runtime.preferences">
+      <initializer class="org.eclipse.debug.internal.core.DebugPreferenceInitializer"/>
    </extension>   
 
 </plugin>