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1 package org.oddjob.designer.arooa;
2
3 import java.io.ByteArrayOutputStream  ;
4
5 import org.apache.log4j.Logger;
6 import org.oddjob.arooa.ArooaException;
7 import org.oddjob.arooa.ArooaHandler;
8 import org.oddjob.arooa.ArooaContext;
9 import org.oddjob.arooa.ArooaConstants;
10 import org.oddjob.arooa.Lifecycle;
11 import org.oddjob.arooa.ObjectFactory;
12 import org.oddjob.arooa.handlers.XmlHandler;
13 import org.oddjob.arooa.reflect.BeanUtilsHelper;
14 import org.oddjob.arooa.reflect.IntrospectionHelper;
15 import org.oddjob.designer.components.UnknownDC;
16 import org.xml.sax.Attributes ;
17 import org.xml.sax.SAXParseException ;
18
19
26
27 public class DesignComponentHandler extends ArooaHandler {
28 private static final Logger logger = Logger.getLogger(DesignComponentHandler.class);
29
30 private static final String UNKNOWN = "unknown";
31
32 private static final String NAME_ATTRIBUTE = "nameattribute";
33
34 private ByteArrayOutputStream xmlOut = new ByteArrayOutputStream ();
35 private XmlHandler xmlHandler = new XmlHandler(xmlOut);
36
37 private DualHandler dualHandler;
38
39
40
54 public void onStartElement(String uri, String tag, String qname,
55 Attributes attrs,
56 ArooaContext context)
57 throws SAXParseException {
58 xmlHandler.onStartElement(uri, tag, qname, attrs, context);
59 context.set(NAME_ATTRIBUTE, attrs.getValue("name"));
60
61 ObjectFactory factory = (ObjectFactory) context.get(ArooaConstants.COMPONENT_FACTORY);
62 Object component = null;
63 try {
64 component = factory.createObject(tag);
65 } catch (Exception e) {
66 throw new SAXParseException ("Failed to create object - \"" + qname
67 + "\"", context.getLocator(), e);
68 }
69 if (component == null) {
70 component = factory.createObject("other");
71 }
72 if (component instanceof UnknownDC) {
74 context.set(UNKNOWN, "true");
75 }
76
77 IntrospectionHelper ih = IntrospectionHelper.getHelper(component.getClass());
78
79 if (context.get(UNKNOWN) == null) {
80 try {
81 HandlerUtils.setAttributes(uri, attrs, component);
82 } catch (Exception e) {
83 logger.debug("Tag [" + tag + "], failed to set attribute ("
84 + e.getMessage() + "), switching to unknown.");
85 context.set(UNKNOWN, "true");
86 }
87 }
88
89 context.set(ArooaConstants.CURRENTLY_CONFIGURING, component);
90 }
91
92
96 public void characters(char[] buf, int start, int count,
97 ArooaContext context)
98 throws SAXParseException {
99 xmlHandler.characters(buf, start, count, context);
100
101 Object component = context.get(ArooaConstants.CURRENTLY_CONFIGURING);
102 IntrospectionHelper ih = IntrospectionHelper.getHelper(component.getClass());
103 try {
104 ih.addText(component, new String (buf, start, count));
105 } catch (ArooaException e) {
106 context.set(UNKNOWN, "true");
107 }
108 }
109
110
114 public ArooaHandler onStartChild(String uri, String tag, String qname,
115 Attributes attrs,
116 ArooaContext context)
117 throws SAXParseException {
118 ArooaHandler nextXmlHandler = xmlHandler.onStartChild(uri, tag, qname, attrs, context);
119 context.set(ArooaConstants.COMPONENT_HANDLER, new DesignComponentHandler());
120 if (context.getLocal(UNKNOWN) == null) {
121 Object component = context.get(ArooaConstants.CURRENTLY_CONFIGURING);
122 IntrospectionHelper ih = IntrospectionHelper.getHelper(component.getClass());
123 ArooaHandler nextOtherHandler = ih.provideHandler(component, tag, context);
124 dualHandler = new DualHandler(nextXmlHandler, nextOtherHandler);
125 return dualHandler;
126 }
127 else {
128 return nextXmlHandler;
129 }
130 }
131
132 public void onEndChild(String uri, String tag, String qname,
133 ArooaContext context)
134 throws SAXParseException {
135 xmlHandler.onEndChild(uri, tag, qname, context);
136 if (dualHandler != null && !dualHandler.isHandler2OK()) {
137 context.set(UNKNOWN, "true");
138 }
139 }
140
141
145 public void onEndElement(String uri, String tag, ArooaContext context) {
146 xmlHandler.onEndElement(uri, tag, context);
147
148 Object component = context.get(ArooaConstants.CURRENTLY_CONFIGURING);
149 if (context.get(UNKNOWN) != null) {
150 DesignIH dih = DesignIH.getHelper(component.getClass());
151 String xml = xmlOut.toString();
152 try {
153 dih.unknown(component, xml);
154 }
155 catch (NullPointerException e) {
156 ObjectFactory factory = (ObjectFactory) context.get(ArooaConstants.COMPONENT_FACTORY);
157 component = factory.createObject("other");
158 dih = DesignIH.getHelper(component.getClass());
159 dih.unknown(component, xml);
160 }
161 IntrospectionHelper ih = IntrospectionHelper.getHelper(component.getClass());
163 String name = (String ) context.getLocal(NAME_ATTRIBUTE);
164 if (name != null) {
165 BeanUtilsHelper.setProperty(component, "name", name);
166 }
167 BeanUtilsHelper.setProperty(component, "tag", tag);
168 }
169 Lifecycle.init(component);
170
171 Object parent = context.getParent().get(ArooaConstants.CURRENTLY_CONFIGURING);
172 IntrospectionHelper pih = IntrospectionHelper.getHelper(parent.getClass());
173 pih.storeComponent(parent, component,
174 (String ) context.getParent().get(ArooaConstants.ELEMENT_NAME));
175 }
176 }
177 |
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