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

   1 /*
   2  * Copyright (C) 2007-2012 Argeo GmbH
   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 package org.argeo.slc.core.execution.xml;
  17
  18 import org.apache.commons.logging.Log;
  19 import org.apache.commons.logging.LogFactory;
  20 import org.argeo.slc.SlcException;
  21 import org.argeo.slc.core.execution.DefaultExecutionFlow;
  22 import org.argeo.slc.execution.ExecutionFlow;
  23 import org.springframework.beans.BeanMetadataElement;
  24 import org.springframework.beans.factory.config.BeanDefinitionHolder;
  25 import org.springframework.beans.factory.config.RuntimeBeanReference;
  26 import org.springframework.beans.factory.support.BeanDefinitionBuilder;
  27 import org.springframework.beans.factory.support.ManagedList;
  28 import org.springframework.beans.factory.xml.BeanDefinitionDecorator;
  29 import org.springframework.beans.factory.xml.ParserContext;
  30 import org.w3c.dom.Attr;
  31 import org.w3c.dom.Node;
  32
  33 /** Publishes a {@link Runnable} as an {@link ExecutionFlow} */
  34 public class AsFlowDecorator implements BeanDefinitionDecorator {
  35         private Log log = LogFactory.getLog(AsFlowDecorator.class);
  36
  37         public BeanDefinitionHolder decorate(Node node, BeanDefinitionHolder bean,
  38                         ParserContext ctx) {
  39                 String attrValue = ((Attr) node).getValue();
  40                 if (attrValue.charAt(attrValue.length() - 1) == '/')
  41                         throw new SlcException(attrValue + " cannot end with a path");
  42                 final String flowBeanName = attrValue;
  43
  44                 if (log.isTraceEnabled())
  45                         log.trace("flowBeanName=" + flowBeanName);
  46
  47                 if (ctx.getRegistry().containsBeanDefinition(flowBeanName))
  48                         throw new SlcException("A bean named " + flowBeanName
  49                                         + " is already defined.");
  50                 BeanDefinitionBuilder flow = BeanDefinitionBuilder
  51                                 .rootBeanDefinition(DefaultExecutionFlow.class);
  52                 ManagedList<BeanMetadataElement> executables = new ManagedList<BeanMetadataElement>(
  53                                 1);
  54
  55                 String beanName = bean.getBeanName();
  56                 if (beanName == null)
  57                         executables.add(bean.getBeanDefinition());
  58                 else
  59                         executables.add(new RuntimeBeanReference(beanName));
  60
  61                 // if (path != null)
  62                 // flow.addPropertyValue("path", path);
  63                 flow.addPropertyValue("executables", executables);
  64
  65                 if (beanName != null)
  66                         ctx.getRegistry().registerBeanDefinition(flowBeanName,
  67                                         flow.getBeanDefinition());
  68                 return bean;
  69         }
  70
  71 }