NodeStateFilter.java

/*******************************************************************************
 * Copyright (c) 2011 Wind River Systems, Inc. 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:
 * Wind River Systems - initial API and implementation
 * William Chen (Wind River)- [345552] Edit the remote files with a proper editor
 *******************************************************************************/
package org.eclipse.tm.te.tcf.filesystem.internal.adapters;

import org.eclipse.core.runtime.Assert;
import org.eclipse.tm.te.tcf.filesystem.internal.handlers.StateManager;
import org.eclipse.tm.te.tcf.filesystem.model.CacheState;
import org.eclipse.tm.te.tcf.filesystem.model.FSTreeNode;
import org.eclipse.ui.IActionFilter;

/**
 * This action filter wraps an FSTreeNode and test its attribute of "cache.state".
 * It serves as the expression filter of decorations of Target Explorer.
 */
public class NodeStateFilter implements IActionFilter {
	private FSTreeNode node;

	/**
	 * Constructor.
	 *
	 * @param node
	 *            The wrapped tree node. Must not be <code>null</code>.
	 */
	public NodeStateFilter(FSTreeNode node) {
		Assert.isNotNull(node);
		this.node = node;
	}

	/* (non-Javadoc)
	 * @see org.eclipse.ui.IActionFilter#testAttribute(java.lang.Object, java.lang.String, java.lang.String)
	 */
	@Override
	public boolean testAttribute(Object target, String name, String value) {
		if (name.equals("cache.state") && node.isFile()) { //$NON-NLS-1$
			CacheState state = StateManager.getInstance().getCacheState(node);
			if (value == null)
				value = CacheState.consistent.name();
			return value.equals(state.name());
		}
		return false;
	}
}