001/*
002 * (C) Copyright 2006-2011 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 * Contributors:
017 *     bstefanescu
018 *
019 * $Id$
020 */
021
022package org.nuxeo.ecm.platform.rendering.fm.extensions;
023
024import java.io.IOException;
025import java.util.Map;
026
027import freemarker.core.Environment;
028import freemarker.template.SimpleScalar;
029import freemarker.template.TemplateDirectiveBody;
030import freemarker.template.TemplateDirectiveModel;
031import freemarker.template.TemplateException;
032import freemarker.template.TemplateModel;
033
034/**
035 * @author <a href="mailto:bs@nuxeo.com">Bogdan Stefanescu</a>
036 */
037public class BlockDirective implements TemplateDirectiveModel {
038
039    @Override
040    public void execute(Environment env, @SuppressWarnings("rawtypes") Map params, TemplateModel[] loopVars,
041            TemplateDirectiveBody body) throws TemplateException, IOException {
042
043        String name = null;
044        SimpleScalar scalar = (SimpleScalar) params.get("name");
045        if (scalar != null) {
046            name = scalar.getAsString();
047        }
048
049        scalar = (SimpleScalar) params.get("ifBlockDefined");
050        String ifBlockDefined = null;
051        if (scalar != null) {
052            ifBlockDefined = scalar.getAsString();
053        }
054
055        String page = env.getTemplate().getName();
056        @SuppressWarnings("resource") // not ours to close
057        BlockWriter writer = (BlockWriter) env.getOut();
058        BlockWriterRegistry reg = writer.getRegistry();
059        @SuppressWarnings("resource") // BlockWriter chaining makes close() hazardous
060        BlockWriter bw = new BlockWriter(page, name, reg);
061        bw.ifBlockDefined = ifBlockDefined;
062        writer.writeBlock(bw);
063        // render this block
064        if (body != null) {
065            body.render(bw);
066        }
067    }
068
069}