/* 
 * (C) Copyright 2006-2011 Nuxeo SA (http://nuxeo.com/) and others.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * Contributors:
 *     bstefanescu
 *
 * $Id$
 */

package org.nuxeo.ecm.platform.rendering.fm.extensions;

import java.util.List;

import org.nuxeo.ecm.core.api.IdRef;
import org.nuxeo.ecm.core.api.PathRef;

import freemarker.template.SimpleScalar;
import freemarker.template.TemplateMethodModelEx;
import freemarker.template.TemplateModelException;

/**
 * @author <a href="mailto:bs@nuxeo.com">Bogdan Stefanescu</a>
 */
public class DocRefMethod implements TemplateMethodModelEx {

    public Object exec(List arguments) throws TemplateModelException {
        if (arguments.size() != 1) {
            throw new TemplateModelException("Invalid number of arguments for docRef(id) method");
        }
        String value = null;
        SimpleScalar scalar = (SimpleScalar) arguments.get(0);
        if (scalar != null) {
            value = scalar.getAsString();
        } else {
            throw new TemplateModelException("the argument is not defined");
        }

        if (value.startsWith("/")) {
            return new PathRef(value);
        } else {
            return new IdRef(value);
        }
    }

}