runtime/org.argeo.slc.core/src/main/java/org/argeo/slc/core/execution/MapExecutionContext.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;
  18
  19 import java.util.Collections;
  20 import java.util.Date;
  21 import java.util.HashMap;
  22 import java.util.Map;
  23 import java.util.UUID;
  24
  25 import org.argeo.slc.SlcException;
  26 import org.argeo.slc.execution.ExecutionContext;
  27 import org.springframework.beans.BeanWrapper;
  28 import org.springframework.beans.BeanWrapperImpl;
  29 import org.springframework.beans.BeansException;
  30 import org.springframework.context.ApplicationContext;
  31 import org.springframework.context.ApplicationContextAware;
  32
  33 public class MapExecutionContext implements ExecutionContext,
  34                 ApplicationContextAware {
  35         private final Map<String, Object> variables = Collections
  36                         .synchronizedMap(new HashMap<String, Object>());
  37
  38         private final String uuid;
  39
  40         private ApplicationContext applicationContext;
  41
  42         public MapExecutionContext() {
  43                 uuid = UUID.randomUUID().toString();
  44                 variables.put(VAR_EXECUTION_CONTEXT_ID, uuid);
  45                 variables.put(VAR_EXECUTION_CONTEXT_CREATION_DATE, new Date());
  46         }
  47
  48         public void setVariable(String key, Object value) {
  49                 // check if we do not refer to a bean
  50                 int lastInd = key.lastIndexOf('.');
  51                 if (applicationContext != null && lastInd > 0) {
  52                         String beanName = key.substring(0, lastInd);
  53                         String propertyName = key.substring(lastInd + 1);
  54                         if (applicationContext.containsBean(beanName)) {
  55                                 BeanWrapper beanWrapper = new BeanWrapperImpl(
  56                                                 applicationContext.getBean(beanName));
  57                                 if (!beanWrapper.isWritableProperty(propertyName))
  58                                         throw new SlcException("No writable property "
  59                                                         + propertyName + " in bean " + beanName);
  60                                 beanWrapper.setPropertyValue(propertyName, value);
  61                         }
  62                 }
  63
  64                 variables.put(key, value);
  65         }
  66
  67         public Object getVariable(String key) {
  68                 // check if we do not refer to a bean
  69                 int lastInd = key.lastIndexOf('.');
  70                 if (applicationContext != null && lastInd > 0) {
  71                         String beanName = key.substring(0, lastInd);
  72                         String propertyName = key.substring(lastInd + 1);
  73                         if (applicationContext.containsBean(beanName)) {
  74                                 BeanWrapper beanWrapper = new BeanWrapperImpl(
  75                                                 applicationContext.getBean(beanName));
  76                                 if (!beanWrapper.isReadableProperty(propertyName))
  77                                         throw new SlcException("No readable property "
  78                                                         + propertyName + " in bean " + beanName);
  79                                 Object obj = beanWrapper.getPropertyValue(propertyName);
  80                                 return obj;
  81                         }
  82                 }
  83
  84                 return variables.get(key);
  85         }
  86
  87         public String getUuid() {
  88                 return uuid;
  89         }
  90
  91         @Override
  92         public boolean equals(Object obj) {
  93                 if (obj instanceof ExecutionContext)
  94                         return uuid.equals(((ExecutionContext) obj).getUuid());
  95                 return false;
  96         }
  97
  98         @Override
  99         public String toString() {
 100                 return getClass().getSimpleName() + "#" + uuid;
 101         }
 102
 103         public void setApplicationContext(ApplicationContext applicationContext)
 104                         throws BeansException {
 105                 this.applicationContext = applicationContext;
 106         }
 107
 108 }