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16 package org.apache.cocoon.components.source.impl;
17
18 import java.util.Arrays  ;
19 import java.util.HashSet ;
20 import java.util.Iterator ;
21 import java.util.Set ;
22
23 import org.apache.avalon.framework.activity.Disposable;
24 import org.apache.avalon.framework.activity.Initializable;
25 import org.apache.avalon.framework.configuration.Configurable;
26 import org.apache.avalon.framework.configuration.Configuration;
27 import org.apache.avalon.framework.configuration.ConfigurationException;
28 import org.apache.avalon.framework.container.ContainerUtil;
29 import org.apache.avalon.framework.context.Context;
30 import org.apache.avalon.framework.context.ContextException;
31 import org.apache.avalon.framework.context.Contextualizable;
32 import org.apache.avalon.framework.logger.AbstractLogEnabled;
33 import org.apache.avalon.framework.parameters.Parameters;
34 import org.apache.avalon.framework.service.ServiceManager;
35 import org.apache.avalon.framework.service.Serviceable;
36 import org.apache.avalon.framework.thread.ThreadSafe;
37 import org.apache.cocoon.components.source.SourceDescriptor;
38 import org.apache.cocoon.components.source.SourceInspector;
39 import org.apache.cocoon.components.source.helpers.SourceProperty;
40 import org.apache.excalibur.source.Source;
41 import org.apache.excalibur.source.SourceException;
42 import org.apache.excalibur.source.SourceValidity;
43 import org.apache.excalibur.source.impl.validity.AggregatedValidity;
44
45
52 public final class SourceDescriptorManager extends AbstractLogEnabled
53 implements SourceDescriptor, Contextualizable, Serviceable,
54 Configurable, Initializable, Disposable, ThreadSafe {
55
56 private Set m_inspectors;
58
59 private Context m_context;
60 private ServiceManager m_manager;
61 private Configuration m_configuration;
62
63
64
66 public SourceDescriptorManager() {
67 }
68
69 public void contextualize(Context context) throws ContextException {
70 m_context = context;
71 }
72
73 public void service(ServiceManager manager) {
74 m_manager = manager;
75 }
76
77 public void configure(Configuration configuration) throws ConfigurationException {
78 m_configuration = configuration;
79 }
80
81 public void initialize() throws Exception {
82 m_inspectors = new HashSet ();
83 final ClassLoader classloader = Thread.currentThread().getContextClassLoader();
84 final Configuration[] children = m_configuration.getChildren();
85
86 for (int i = 0; i < children.length; i++) {
87 String className = children[i].getAttribute("class","");
88 SourceInspector inspector;
89 try {
90 final Class inspectorClass = classloader.loadClass(className);
91 inspector = (SourceInspector) inspectorClass.newInstance();
92 } catch (InstantiationException ie) {
93 throw new ConfigurationException(
94 "Could not instantiate class "+className, ie);
95 } catch (ClassNotFoundException cnfe) {
96 throw new ConfigurationException(
97 "Could not load class "+className, cnfe);
98 } catch (IllegalAccessException iae) {
99 throw new ConfigurationException(
100 "Could not load class "+className, iae);
101 }
102 ContainerUtil.enableLogging(inspector,getLogger());
103 ContainerUtil.contextualize(inspector,m_context);
104 ContainerUtil.service(inspector,m_manager);
105 ContainerUtil.configure(inspector,children[i]);
106 ContainerUtil.parameterize(inspector,
107 Parameters.fromConfiguration(children[i]));
108 ContainerUtil.initialize(inspector);
109
110 m_inspectors.add(inspector);
111 }
112 m_configuration = null;
114 m_context = null;
115 m_manager = null;
116 }
117
118 public void dispose() {
119 Iterator iter = m_inspectors.iterator();
120 while(iter.hasNext()) {
121 ContainerUtil.dispose(iter.next());
122 }
123 m_inspectors = null;
124 }
125
126
127
129
132 public SourceProperty getSourceProperty(Source source, String namespace, String name)
133 throws SourceException {
134
135 final Iterator inspectors = m_inspectors.iterator();
136 while (inspectors.hasNext()) {
137 SourceInspector inspector = (SourceInspector) inspectors.next();
138 SourceProperty property = inspector.getSourceProperty(source,namespace,name);
139 if (property != null) {
140 return property;
141 }
142 }
143 return null;
144 }
145
146
149 public SourceProperty[] getSourceProperties(Source source) throws SourceException {
150 final Set result = new HashSet ();
151 SourceInspector inspector;
152 SourceProperty[] properties;
153 final Iterator inspectors = m_inspectors.iterator();
154 while (inspectors.hasNext()) {
155 inspector = (SourceInspector) inspectors.next();
156 properties = inspector.getSourceProperties(source);
157 if (properties != null) {
158 result.addAll(Arrays.asList(properties));
159 }
160 }
161 return (SourceProperty[]) result.toArray(new SourceProperty[result.size()]);
162 }
163
164
168 public boolean handlesProperty(String namespace, String name) {
169 SourceInspector inspector;
170 final Iterator inspectors = m_inspectors.iterator();
171 while(inspectors.hasNext()) {
172 inspector = (SourceInspector) inspectors.next();
173 if (inspector.handlesProperty(namespace,name)) {
174 return true;
175 }
176 }
177 return false;
178 }
179
180
183 public void removeSourceProperty(Source source, String ns, String name) throws SourceException {
184 SourceInspector inspector;
185 final Iterator inspectors = m_inspectors.iterator();
186 while (inspectors.hasNext()) {
187 inspector = (SourceInspector) inspectors.next();
188 if (inspector instanceof SourceDescriptor) {
189 ((SourceDescriptor) inspector).removeSourceProperty(source,ns,name);
190 }
191 }
192 }
193
194
197 public void setSourceProperty(Source source, SourceProperty property) throws SourceException {
198 SourceInspector inspector;
199 final Iterator inspectors = m_inspectors.iterator();
200 while (inspectors.hasNext()) {
201 inspector = (SourceInspector) inspectors.next();
202 if (inspector instanceof SourceDescriptor) {
203 ((SourceDescriptor) inspector).setSourceProperty(source,property);
204 }
205 }
206 }
207
208
211 public SourceValidity getValidity(Source source) {
212 AggregatedValidity validity = new AggregatedValidity();
213 SourceInspector inspector;
214 final Iterator inspectors = m_inspectors.iterator();
215 while (inspectors.hasNext()) {
216 inspector = (SourceInspector) inspectors.next();
217 SourceValidity sv = inspector.getValidity(source);
218 if (sv == null) {
219 return null;
220 }
221 validity.add(sv);
222 }
223 return validity;
224 }
225 }
226
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