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}