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1
10
11 package org.mule.config.builders;
12
13 import org.apache.commons.beanutils.MethodUtils;
14 import org.apache.commons.digester.ObjectCreateRule;
15 import org.mule.config.ConfigurationException;
16 import org.mule.config.i18n.Message;
17 import org.mule.config.i18n.Messages;
18 import org.mule.impl.container.ContainerKeyPair;
19 import org.mule.umo.manager.UMOContainerContext;
20 import org.xml.sax.Attributes  ;
21
22 import java.lang.reflect.InvocationTargetException ;
23
24
30 public class ObjectGetOrCreateRule extends ObjectCreateRule
31 {
32 public static final String DEFAULT_REF_ATTRIBUTE = "ref";
33 public static final String DEFAULT_CLASSNAME_ATTRIBUTE = "className";
34 protected String refAttrib = DEFAULT_REF_ATTRIBUTE;
35 protected String classAttrib = DEFAULT_CLASSNAME_ATTRIBUTE;
36 protected boolean classRefRequired = false;
37 protected String containerMethodName;
38 protected UMOContainerContext context;
39 protected String containerAttrib;
40
41 public ObjectGetOrCreateRule(String defaultImpl, String className, String containerMethodName)
42 {
43 this(defaultImpl, className, DEFAULT_REF_ATTRIBUTE, false, containerMethodName);
44 }
45
46 public ObjectGetOrCreateRule(String defaultImpl,
47 String className,
48 boolean classRefRequired,
49 String containerMethodName)
50 {
51 this(defaultImpl, className, DEFAULT_REF_ATTRIBUTE, classRefRequired, containerMethodName);
52 }
53
54 public ObjectGetOrCreateRule(String defaultImpl,
55 String className,
56 String refAttrib,
57 boolean classRefRequired,
58 String containerMethodName)
59 {
60 super(defaultImpl, className);
61 this.refAttrib = refAttrib;
62 this.classRefRequired = classRefRequired;
63 this.containerMethodName = containerMethodName;
64 }
65
66 public ObjectGetOrCreateRule(String defaultImpl,
67 String className,
68 String refAttrib,
69 String classAttrib,
70 boolean classRefRequired,
71 String containerMethodName)
72 {
73 super(defaultImpl, className);
74 this.refAttrib = refAttrib;
75 this.classRefRequired = classRefRequired;
76 this.containerMethodName = containerMethodName;
77 this.classAttrib = classAttrib;
78 }
79
80 public ObjectGetOrCreateRule(String defaultImpl,
81 String className,
82 String refAttrib,
83 String containerAttrib,
84 String classAttrib,
85 boolean classRefRequired,
86 String containerMethodName)
87 {
88 super(defaultImpl, className);
89 this.refAttrib = refAttrib;
90 this.containerAttrib = containerAttrib;
91 this.classRefRequired = classRefRequired;
92 this.containerMethodName = containerMethodName;
93 this.classAttrib = classAttrib;
94 }
95
96
103 public void begin(Attributes attributes) throws Exception
104 {
105
106 String ref = attributes.getValue(refAttrib);
107 String container = null;
108 if (containerAttrib != null)
109 {
110 container = attributes.getValue(containerAttrib);
111 }
112 if (ref != null)
113 {
114 Object cRef = ref;
115 if (container != null)
116 {
117 cRef = new ContainerKeyPair(container, ref);
118 }
119 Object obj = getContainer().getComponent(cRef);
120 digester.push(obj);
121 }
122 else
123 {
124 String classRef = attributes.getValue(classAttrib);
125 if (classRef == null && classRefRequired)
126 {
127 throw new ConfigurationException(new Message(
128 Messages.MUST_SPECIFY_REF_ATTRIB_X_OR_CLASS_ATTRIB_X_FOR_X, refAttrib, classAttrib,
129 this.digester.getCurrentElementName()));
130 }
131 else
132 {
133 super.begin(attributes);
134 }
135 }
136 }
137
138 protected UMOContainerContext getContainer()
139 throws NoSuchMethodException , IllegalAccessException , InvocationTargetException
140 {
141 if (context == null)
142 {
143 Object root = digester.getRoot();
144 context = (UMOContainerContext)MethodUtils.invokeMethod(root, containerMethodName, null);
145 if (context == null)
146 {
147 throw new NullPointerException (
148 new Message(Messages.X_IS_NULL, "Container context").toString());
149 }
150 }
151 return context;
152 }
153 }
154 |
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