runtime/org.argeo.slc.core/src/main/java/org/argeo/slc/core/execution/xml/AsFlowDecorator.java

   1 /*
   2  * Copyright (C) 2010 Mathieu Baudier <mbaudier@argeo.org>
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *         http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 package org.argeo.slc.core.execution.xml;
  18
  19 import org.apache.commons.logging.Log;
  20 import org.apache.commons.logging.LogFactory;
  21 import org.argeo.slc.SlcException;
  22 import org.argeo.slc.core.execution.DefaultExecutionFlow;
  23 import org.springframework.beans.factory.config.BeanDefinitionHolder;
  24 import org.springframework.beans.factory.config.RuntimeBeanReference;
  25 import org.springframework.beans.factory.support.BeanDefinitionBuilder;
  26 import org.springframework.beans.factory.support.ManagedList;
  27 import org.springframework.beans.factory.xml.BeanDefinitionDecorator;
  28 import org.springframework.beans.factory.xml.ParserContext;
  29 import org.w3c.dom.Attr;
  30 import org.w3c.dom.Node;
  31
  32 public class AsFlowDecorator implements BeanDefinitionDecorator {
  33         private Log log = LogFactory.getLog(AsFlowDecorator.class);
  34
  35         @SuppressWarnings("unchecked")
  36         public BeanDefinitionHolder decorate(Node node, BeanDefinitionHolder bean,
  37                         ParserContext ctx) {
  38                 String attrValue = ((Attr) node).getValue();
  39                 if (attrValue.charAt(attrValue.length() - 1) == '/')
  40                         throw new SlcException(attrValue + " cannot end with a path");
  41                 int lastSlash = attrValue.lastIndexOf('/');
  42                 String path;
  43                 String flowBeanName;
  44                 if (lastSlash > 0) {
  45                         flowBeanName = attrValue.substring(lastSlash + 1);
  46                         path = attrValue.substring(0, lastSlash);
  47                 } else if (lastSlash == 0) {
  48                         flowBeanName = attrValue.substring(lastSlash + 1);
  49                         path = null;
  50                 } else {
  51                         flowBeanName = attrValue;
  52                         path = null;
  53                 }
  54
  55                 if (log.isTraceEnabled())
  56                         log.debug("path=" + path + ", flowBeanName=" + flowBeanName);
  57
  58                 if (ctx.getRegistry().containsBeanDefinition(flowBeanName))
  59                         throw new SlcException("A bean named " + flowBeanName
  60                                         + " is already defined.");
  61                 BeanDefinitionBuilder flow = BeanDefinitionBuilder
  62                                 .rootBeanDefinition(DefaultExecutionFlow.class);
  63                 ManagedList executables = new ManagedList(1);
  64
  65                 String beanName = bean.getBeanName();
  66                 if (beanName == null)
  67                         executables.add(bean.getBeanDefinition());
  68                 else
  69                         executables.add(new RuntimeBeanReference(beanName));
  70
  71                 if (path != null)
  72                         flow.addPropertyValue("path", path);
  73                 flow.addPropertyValue("executables", executables);
  74
  75                 if (beanName != null)
  76                         ctx.getRegistry().registerBeanDefinition(flowBeanName,
  77                                         flow.getBeanDefinition());
  78                 return bean;
  79         }
  80
  81 }