runtime/org.argeo.slc.core/src/main/java/org/argeo/slc/core/execution/DefaultExecutionSpec.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.ArrayList;
  20 import java.util.HashMap;
  21 import java.util.List;
  22 import java.util.Map;
  23 import java.util.UUID;
  24
  25 import org.apache.commons.logging.Log;
  26 import org.apache.commons.logging.LogFactory;
  27 import org.argeo.slc.execution.ExecutionSpec;
  28 import org.argeo.slc.execution.ExecutionSpecAttribute;
  29 import org.springframework.beans.factory.BeanNameAware;
  30 import org.springframework.beans.factory.InitializingBean;
  31 import org.springframework.beans.factory.NoSuchBeanDefinitionException;
  32 import org.springframework.beans.factory.config.BeanDefinition;
  33 import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
  34 import org.springframework.context.ApplicationContext;
  35 import org.springframework.context.ApplicationContextAware;
  36 import org.springframework.context.ConfigurableApplicationContext;
  37
  38 public class DefaultExecutionSpec implements ExecutionSpec, BeanNameAware,
  39                 ApplicationContextAware, InitializingBean {
  40         private final static Log log = LogFactory
  41                         .getLog(DefaultExecutionSpec.class);
  42         private ApplicationContext applicationContext;
  43
  44         private String description;
  45         private Map<String, ExecutionSpecAttribute> attributes = new HashMap<String, ExecutionSpecAttribute>();
  46
  47         private String name = getClass().getName() + "#" + UUID.randomUUID();
  48
  49         public Map<String, ExecutionSpecAttribute> getAttributes() {
  50                 return attributes;
  51         }
  52
  53         public void setAttributes(Map<String, ExecutionSpecAttribute> attributes) {
  54                 this.attributes = attributes;
  55         }
  56
  57         public void setBeanName(String name) {
  58                 this.name = name;
  59         }
  60
  61         public String getName() {
  62                 return name;
  63         }
  64
  65         public boolean equals(Object obj) {
  66                 return ((ExecutionSpec) obj).getName().equals(name);
  67         }
  68
  69         public String getDescription() {
  70                 return description;
  71         }
  72
  73         private ConfigurableListableBeanFactory getBeanFactory() {
  74                 return ((ConfigurableApplicationContext) applicationContext)
  75                                 .getBeanFactory();
  76         }
  77
  78         public void setApplicationContext(ApplicationContext applicationContext) {
  79                 this.applicationContext = applicationContext;
  80         }
  81
  82         public void afterPropertiesSet() throws Exception {
  83                 if (description == null) {
  84                         try {
  85                                 description = getBeanFactory().getBeanDefinition(name)
  86                                                 .getDescription();
  87                         } catch (NoSuchBeanDefinitionException e) {
  88                                 // silent
  89                         }
  90                 }
  91
  92                 for (String key : attributes.keySet()) {
  93                         ExecutionSpecAttribute attr = attributes.get(key);
  94                         if (attr instanceof RefSpecAttribute) {
  95                                 RefSpecAttribute rsa = (RefSpecAttribute) attr;
  96                                 if (rsa.getChoices() == null) {
  97                                         List<RefValueChoice> choices = buildRefValueChoices(rsa);
  98                                         rsa.setChoices(choices);
  99                                 }
 100                                 if (log.isTraceEnabled())
 101                                         log.debug("Spec attr " + key + " has "
 102                                                         + rsa.getChoices().size() + " choices");
 103                         }
 104                 }
 105         }
 106
 107         protected List<RefValueChoice> buildRefValueChoices(RefSpecAttribute rsa) {
 108                 List<RefValueChoice> choices = new ArrayList<RefValueChoice>();
 109                 if (applicationContext == null) {
 110                         log.warn("No application context declared,"
 111                                         + " cannot scan ref value choices.");
 112                         return choices;
 113                 }
 114
 115                 for (String beanName : getBeanFactory().getBeanNamesForType(
 116                                 rsa.getTargetClass(), true, false)) {
 117                         BeanDefinition bd = getBeanFactory().getBeanDefinition(beanName);
 118                         RefValueChoice choice = new RefValueChoice();
 119                         choice.setName(beanName);
 120                         choice.setDescription(bd.getDescription());
 121                         if (log.isTraceEnabled())
 122                                 log.debug("Found choice " + beanName + " for " + rsa);
 123
 124                         choices.add(choice);
 125
 126                 }
 127                 return choices;
 128         }
 129
 130 }