Author: rgardler
Date: Fri Nov 17 17:59:26 2006
New Revision: 476411
URL: http://svn.apache.org/viewvc?view=rev&rev=476411
Log:
* A chained reader implements a psuedo protocol.
* It is commonly used when you need to retrieve a
* document that whose type cannot be identified
* from the raw source alone.
*
* It is defined in forrestContext.xml as follows:
*
* <bean id="fooProtocol"
* class="org.apache.forrest.reader.ChainedReader" >
* <property name="docType"
* value="org.foo.Bar" />
* </bean>
*
* We can then define a chain of readers like this:
*
* <location pattern="classpath/foo.*">
* <source href="fooProtocol:classpath:/xdocs/exampleFeed.xml"/>
* </location>
*
* <location pattern="file/foo.*">
* <source href="fooProtocol:file:/xdocs/exampleFeed.xml"/>
* </location>
*
* <location pattern="http/foo.*">
* <source href="fooProtocol:http:/xdocs/exampleFeed.xml"/>
* </location>
*
* etc.
[FOR-943]
Added:
forrest/trunk/whiteboard/forrest2/core/org/apache/forrest/reader/ChainedReader.java
(with props)
Added:
forrest/trunk/whiteboard/forrest2/core/org/apache/forrest/reader/ChainedReader.java
URL:
http://svn.apache.org/viewvc/forrest/trunk/whiteboard/forrest2/core/org/apache/forrest/reader/ChainedReader.java?view=auto&rev=476411
==============================================================================
---
forrest/trunk/whiteboard/forrest2/core/org/apache/forrest/reader/ChainedReader.java
(added)
+++
forrest/trunk/whiteboard/forrest2/core/org/apache/forrest/reader/ChainedReader.java
Fri Nov 17 17:59:26 2006
@@ -0,0 +1,98 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.forrest.reader;
+
+import java.net.MalformedURLException;
+import java.net.URI;
+import java.net.URISyntaxException;
+
+import org.apache.forrest.core.document.AbstractSourceDocument;
+import org.apache.forrest.core.document.DefaultSourceDocument;
+import org.apache.forrest.core.locationMap.Location;
+import org.springframework.context.support.AbstractXmlApplicationContext;
+
+/**
+ * A chained reader implements a psuedo protocol.
+ * It is commonly used when you need to retrieve a
+ * document that whose type cannot be identified
+ * from the raw source alone.
+ *
+ * It is defined in forrestContext.xml as follows:
+ *
+ * <bean id="fooProtocol"
+ * class="org.apache.forrest.reader.ChainedReader" >
+ * <property name="docType"
+ * value="org.foo.Bar" />
+ * </bean>
+ *
+ * We can then define a chain of readers like this:
+ *
+ * <location pattern="classpath/foo.*">
+ * <source href="fooProtocol:classpath:/xdocs/exampleFeed.xml"/>
+ * </location>
+ *
+ * <location pattern="file/foo.*">
+ * <source href="fooProtocol:file:/xdocs/exampleFeed.xml"/>
+ * </location>
+ *
+ * <location pattern="http/foo.*">
+ * <source href="fooProtocol:http:/xdocs/exampleFeed.xml"/>
+ * </location>
+ *
+ * etc.
+ *
+ */
+public class ChainedReader extends AbstractReader {
+
+ private String docType;
+
+ public AbstractSourceDocument read(AbstractXmlApplicationContext
context,
+ final Location location) {
+ DefaultSourceDocument doc = null;
+ final URI psudeoURI = location.getSourceURI();
+ final String ssp = psudeoURI.getSchemeSpecificPart();
+ URI uri;
+ try {
+ uri = new URI(ssp);
+ location.setSourceURI(uri);
+ IReader reader;
+ reader = (IReader) context.getBean(uri.getScheme());
+ doc = (DefaultSourceDocument) reader.read(context,
location);
+ if (doc != null) {
+ doc
+ .setType(getDocType());
+ }
+ } catch (final URISyntaxException e) {
+ // TODO Auto-generated catch block
+ e.printStackTrace();
+ } catch (MalformedURLException e) {
+ // TODO Auto-generated catch block
+ e.printStackTrace();
+ }
+ return doc;
+ }
+
+ public String getDocType() {
+ return docType;
+ }
+
+ public void setDocType(String docType) {
+ this.docType = docType;
+ }
+
+
+}
Propchange:
forrest/trunk/whiteboard/forrest2/core/org/apache/forrest/reader/ChainedReader.java
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