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/*******************************************************************************
* Copyright (c) 2000, 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.debug.internal.core;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.debug.core.DebugPlugin;
import org.eclipse.debug.core.ILogicalStructureProvider;
import org.eclipse.debug.core.ILogicalStructureType;
import org.eclipse.debug.core.model.IValue;
/**
* Manage logical structure provider extensions
*
* @see IConfigurationElementConstants
*/
public class LogicalStructureProvider {
private IConfigurationElement fConfigurationElement;
private String fModelIdentifier;
private ILogicalStructureProvider fDelegate;
public LogicalStructureProvider(IConfigurationElement element) throws CoreException {
fConfigurationElement= element;
fModelIdentifier= fConfigurationElement.getAttribute(IConfigurationElementConstants.MODEL_IDENTIFIER);
if (fModelIdentifier == null) {
throw new CoreException(new Status(IStatus.ERROR, DebugPlugin.getUniqueIdentifier(), DebugPlugin.ERROR, DebugCoreMessages.LogicalStructureProvider_0, null));
}
String className= fConfigurationElement.getAttribute(IConfigurationElementConstants.CLASS);
if (className == null) {
throw new CoreException(new Status(IStatus.ERROR, DebugPlugin.getUniqueIdentifier(), DebugPlugin.ERROR, DebugCoreMessages.LogicalStructureProvider_1, null));
}
}
/**
* Return the logical structure type able to provide a logical structure for
* the given value.
*
* @param value value for which structure types are requested
* @return logical structure types
*/
public ILogicalStructureType[] getLogicalStructures(IValue value) {
if (fModelIdentifier.equals(value.getModelIdentifier())) {
return getDelegate().getLogicalStructureTypes(value);
}
return new ILogicalStructureType[0];
}
/**
* Return the ILogicalStructureProvider for this extension.
* @return the {@link ILogicalStructureProvider}
*/
protected ILogicalStructureProvider getDelegate() {
if (fDelegate == null) {
try {
fDelegate = (ILogicalStructureProvider) fConfigurationElement.createExecutableExtension(IConfigurationElementConstants.CLASS);
} catch (CoreException e) {
DebugPlugin.log(e);
}
}
return fDelegate;
}
}
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