2 * Copyright (C) 2007-2012 Mathieu Baudier
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
16 package org
.argeo
.slc
.core
.execution
.xml
;
18 import java
.util
.ArrayList
;
19 import java
.util
.List
;
21 import org
.apache
.commons
.logging
.Log
;
22 import org
.apache
.commons
.logging
.LogFactory
;
23 import org
.argeo
.slc
.SlcException
;
24 import org
.argeo
.slc
.core
.execution
.DefaultExecutionFlow
;
25 import org
.argeo
.slc
.execution
.ExecutionFlow
;
26 import org
.springframework
.beans
.factory
.BeanDefinitionStoreException
;
27 import org
.springframework
.beans
.factory
.config
.RuntimeBeanReference
;
28 import org
.springframework
.beans
.factory
.support
.AbstractBeanDefinition
;
29 import org
.springframework
.beans
.factory
.support
.BeanDefinitionBuilder
;
30 import org
.springframework
.beans
.factory
.support
.ManagedList
;
31 import org
.springframework
.beans
.factory
.support
.ManagedMap
;
32 import org
.springframework
.beans
.factory
.xml
.AbstractSingleBeanDefinitionParser
;
33 import org
.springframework
.beans
.factory
.xml
.ParserContext
;
34 import org
.springframework
.util
.StringUtils
;
35 import org
.springframework
.util
.xml
.DomUtils
;
36 import org
.w3c
.dom
.Element
;
37 import org
.w3c
.dom
.Node
;
38 import org
.w3c
.dom
.NodeList
;
40 /** Interprets the <flow:flow> tag */
41 public class FlowBeanDefinitionParser
extends
42 AbstractSingleBeanDefinitionParser
{
43 private Log log
= LogFactory
.getLog(FlowBeanDefinitionParser
.class);
45 @SuppressWarnings("unchecked")
47 protected void doParse(Element element
, ParserContext parserContext
,
48 BeanDefinitionBuilder builder
) {
49 String path
= element
.getAttribute("path");
50 if (StringUtils
.hasText(path
))
51 log
.warn("The 'path' attribute is not used anymore to build flows");
53 String spec
= element
.getAttribute("spec");
54 if (StringUtils
.hasText(spec
))
55 builder
.getBeanDefinition().getConstructorArgumentValues()
56 .addGenericArgumentValue(new RuntimeBeanReference(spec
));
58 String abstrac
= element
.getAttribute("abstract");
59 if (StringUtils
.hasText(abstrac
))
60 builder
.setAbstract(Boolean
.parseBoolean(abstrac
));
62 String parent
= element
.getAttribute("parent");
63 if (StringUtils
.hasText(parent
))
64 builder
.setParentName(parent
);
66 builder
.getBeanDefinition().setDescription(
67 DomUtils
.getChildElementValueByTagName(element
, "description"));
69 List
<Element
> argsElems
= new ArrayList
<Element
>();
70 List
<Element
> execElems
= new ArrayList
<Element
>();
71 List
<Element
> specElems
= new ArrayList
<Element
>();
72 NodeList nodeList
= element
.getChildNodes();
73 for (int i
= 0; i
< nodeList
.getLength(); i
++) {
74 Node node
= nodeList
.item(i
);
75 if (node
instanceof Element
) {
76 if (DomUtils
.nodeNameEquals(node
, "arg"))
77 argsElems
.add((Element
) node
);
78 else if (DomUtils
.nodeNameEquals(node
, "spec"))
79 specElems
.add((Element
) node
);
80 else if (!DomUtils
.nodeNameEquals(node
, "description"))
81 execElems
.add((Element
) node
);
86 if (argsElems
.size() != 0) {
87 ManagedMap args
= new ManagedMap(argsElems
.size());
88 for (Element argElem
: argsElems
) {
89 Object value
= NamespaceUtils
.parseValue(argElem
,
90 parserContext
, builder
.getBeanDefinition(), null);
92 args
.put(argElem
.getAttribute("name"), value
);
94 throw new SlcException("No value defined.");
96 builder
.getBeanDefinition().getConstructorArgumentValues()
97 .addGenericArgumentValue(args
);
101 if (StringUtils
.hasText(spec
) && specElems
.size() != 0)
102 throw new SlcException("A flow cannot have multiple specs");
103 if (specElems
.size() == 1) {
104 Object specObj
= NamespaceUtils
.parseBeanOrReference(
105 specElems
.get(0), parserContext
,
106 builder
.getBeanDefinition());
107 builder
.getBeanDefinition().getConstructorArgumentValues()
108 .addGenericArgumentValue(specObj
);
109 } else if (specElems
.size() > 1)
110 throw new SlcException("A flow cannot have multiple specs");
113 if (execElems
.size() != 0) {
114 ManagedList executables
= new ManagedList(execElems
.size());
115 for (Element child
: execElems
) {
116 // child validity check is performed in xsd
117 executables
.add(NamespaceUtils
.parseBeanOrReference(child
,
118 parserContext
, builder
.getBeanDefinition()));
120 if (executables
.size() > 0)
121 builder
.addPropertyValue("executables", executables
);
125 @SuppressWarnings("unchecked")
127 protected Class
<?
extends ExecutionFlow
> getBeanClass(Element element
) {
128 String clss
= element
.getAttribute("class");
129 if (StringUtils
.hasText(clss
))
130 // TODO: check that it actually works
132 return (Class
<?
extends ExecutionFlow
>) getClass()
133 .getClassLoader().loadClass(clss
);
134 } catch (ClassNotFoundException e
) {
136 return (Class
<?
extends ExecutionFlow
>) Thread
137 .currentThread().getContextClassLoader()
139 } catch (ClassNotFoundException e1
) {
140 throw new SlcException("Cannot load class " + clss
, e
);
144 return DefaultExecutionFlow
.class;
147 // parse nested bean definition
148 // private Object parseBeanReference(Element element,
149 // ParserContext parserContext, BeanDefinitionBuilder builder) {
150 // return parserContext.getDelegate().parsePropertySubElement(element,
151 // builder.getBeanDefinition());
155 protected String
resolveId(Element element
,
156 AbstractBeanDefinition definition
, ParserContext parserContext
)
157 throws BeanDefinitionStoreException
{
158 String name
= element
.getAttribute("name");
159 if (StringUtils
.hasText(name
)) {
162 return super.resolveId(element
, definition
, parserContext
);
166 protected boolean shouldGenerateIdAsFallback() {