/*******************************************************************************
 * Copyright (c) 2007 Exadel, Inc. and Red Hat, Inc.
 * Distributed under license by Red Hat, Inc. All rights reserved.
 * This program is 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:
 *     Exadel, Inc. and Red Hat, Inc. - initial API and implementation
 ******************************************************************************/ 
package org.jboss.tools.vpe.editor.template.expression;

import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;

import org.jboss.tools.vpe.editor.context.VpePageContext;

public class VpeFunctionAttrPresent extends VpeFunction {

	public VpeValue exec(VpePageContext pageContext, Node sourceNode) throws VpeExpressionException {
		boolean present = false;
		NamedNodeMap attrs = sourceNode.getAttributes();
		if (attrs != null) {
			for (int i = 0; i < attrs.getLength(); i++) {
				Node attr = attrs.item(i);
				present = getParameter(0).exec(pageContext, sourceNode).stringValue().equalsIgnoreCase(attr.getNodeName());
				if (present) break;
			}
		}
		return new VpeValue(present);
	}

	@Override
	String[] getSignatures() {
		return new String[] {VpeExpressionBuilder.SIGNATURE_ANY_ATTR};
	}
}
