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/*******************************************************************************
* Copyright (c) 2000, 2003 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Common Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/cpl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.debug.ui.variables;
import java.text.MessageFormat;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.debug.internal.ui.DebugUIPlugin;
import org.eclipse.debug.internal.ui.launchConfigurations.LaunchConfigurationsMessages;
/**
* Default variable expander implementation. Does nothing.
*
* Clients are intended to extend this class.
* @since 3.0
*/
public class DefaultVariableExpander implements IVariableExpander {
private static DefaultVariableExpander instance;
public static DefaultVariableExpander getDefault() {
if (instance == null) {
instance= new DefaultVariableExpander();
}
return instance;
}
/**
* @see IVariableExpander#getPath(String, String, ExpandVariableContext)
*/
public IPath getPath(String varTag, String varValue, ExpandVariableContext context) throws CoreException {
throwExpansionException(varTag, MessageFormat.format(LaunchConfigurationsMessages.getString("DefaultVariableExpander.No_expander_class_defined_for_the_variable_{0}_1"), new String[] {varTag})); //$NON-NLS-1$
return null;
}
/**
* @see IVariableExpander#getResources(String, String, ExpandVariableContext)
*/
public IResource[] getResources(String varTag, String varValue, ExpandVariableContext context) throws CoreException {
throwExpansionException(varTag, MessageFormat.format(LaunchConfigurationsMessages.getString("DefaultVariableExpander.No_expander_class_defined_for_the_variable_{0}_1"), new String[] {varTag})); //$NON-NLS-1$
return null;
}
/**
* @see IVariableExpander#getText(String, String, ExpandVariableContext)
*/
public String getText(String varTag, String varValue, ExpandVariableContext context) throws CoreException {
throwExpansionException(varTag, MessageFormat.format(LaunchConfigurationsMessages.getString("DefaultVariableExpander.No_expander_class_defined_for_the_variable_{0}_1"), new String[] {varTag})); //$NON-NLS-1$
return null;
}
/**
* Utility method which throws an exception that occurred for the given reason
* while expanding the given variable tag.
*/
public static void throwExpansionException(String varTag, String reason) throws CoreException {
throw new CoreException(new Status(IStatus.ERROR, DebugUIPlugin.getUniqueIdentifier(), IStatus.ERROR, MessageFormat.format(LaunchConfigurationsMessages.getString("DefaultVariableExpander.An_error_occurred_attempting_to_expand_the_variable_{0}._{1}_4"), new String[] {varTag, reason}), null)); //$NON-NLS-1$
}
}
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