haul 2002/12/16 03:02:39
Added: src/java/org/apache/cocoon/transformation
AbstractExtractionTransformer.java
SimpleFormInstanceExtractionTransformer.java
Log:
<action dev="CH" type="add">
New transformer extracts fragments to documents and stores them using an
OutputModule. Tags that start fragment are configurable.
</action>
Revision Changes Path
1.1
xml-cocoon2/src/java/org/apache/cocoon/transformation/AbstractExtractionTransformer.java
Index: AbstractExtractionTransformer.java
===================================================================
/*
============================================================================
The Apache Software License, Version 1.1
============================================================================
Copyright (C) 1999-2002 The Apache Software Foundation. All rights reserved.
Redistribution and use in source and binary forms, with or without modifica-
tion, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
3. The end-user documentation included with the redistribution, if any, must
include the following acknowledgment: "This product includes software
developed by the Apache Software Foundation (http://www.apache.org/)."
Alternately, this acknowledgment may appear in the software itself, if
and wherever such third-party acknowledgments normally appear.
4. The names "Apache Cocoon" and "Apache Software Foundation" must not be
used to endorse or promote products derived from this software without
prior written permission. For written permission, please contact
[EMAIL PROTECTED]
5. Products derived from this software may not be called "Apache", nor may
"Apache" appear in their name, without prior written permission of the
Apache Software Foundation.
THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
This software consists of voluntary contributions made by many individuals
on behalf of the Apache Software Foundation and was originally created by
Stefano Mazzocchi <[EMAIL PROTECTED]>. For more information on the Apache
Software Foundation, please see <http://www.apache.org/>.
*/
package org.apache.cocoon.transformation;
import org.apache.avalon.framework.parameters.Parameters;
import org.apache.cocoon.ProcessingException;
import org.apache.cocoon.environment.SourceResolver;
import org.apache.cocoon.xml.dom.DOMBuilder;
import org.apache.avalon.excalibur.pool.Recyclable;
import org.w3c.dom.Document;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import java.io.IOException;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
/**
* This transformer sieves an incoming stream of xml
* and feeds a DOMBuilder with it.
*
* @author <a href="mailto:[EMAIL PROTECTED]";>Paul Russell</a>
* @author <a href="mailto:[EMAIL PROTECTED]";>Christian Haul</a>
* @version CVS $Id: AbstractExtractionTransformer.java,v 1.1 2002/12/16 11:02:38
haul Exp $
*/
abstract public class AbstractExtractionTransformer extends AbstractTransformer {
private DOMBuilder currentBuilder;
private Map prefixMap;
private int extractLevel;
/** Setup the transformer. */
public void setup(SourceResolver resolver, Map objectModel, String src,
Parameters parameters)
throws ProcessingException, SAXException, IOException {
extractLevel = 0;
prefixMap = new HashMap();
}
public void recycle() {
this.extractLevel = 0;
this.currentBuilder = null;
this.prefixMap = null;
}
/**
* Receive notification of the beginning of a document.
*/
public void startDocument() throws SAXException {
super.startDocument();
}
/**
* Receive notification of the end of a document.
*/
public void endDocument() throws SAXException {
super.endDocument();
}
/**
* Begin the scope of a prefix-URI Namespace mapping.
*
* @param prefix The Namespace prefix being declared.
* @param uri The Namespace URI the prefix is mapped to.
*/
public void startPrefixMapping(String prefix, String uri)
throws SAXException {
if (extractLevel == 0) {
super.startPrefixMapping(prefix,uri);
prefixMap.put(prefix,uri);
} else {
this.currentBuilder.startPrefixMapping(prefix,uri);
}
}
/**
* End the scope of a prefix-URI mapping.
*
* @param prefix The prefix that was being mapping.
*/
public void endPrefixMapping(String prefix)
throws SAXException {
if (extractLevel == 0) {
super.endPrefixMapping(prefix);
prefixMap.remove(prefix);
} else {
this.currentBuilder.endPrefixMapping(prefix);
}
}
/**
* Receive notification of the beginning of an element. Uses
* startExtraction to determine whether to start
* extracting. Nested triggering tags result in only one document.
* * startExtractedDocument with the first node of the extracted
* Document.
*
* @param uri The Namespace URI, or the empty string if the element has no
* Namespace URI or if Namespace
* processing is not being performed.
* @param loc The local name (without prefix), or the empty string if
* Namespace processing is not being performed.
* @param raw The raw XML 1.0 name (with prefix), or the empty string if
* raw names are not available.
* @param a The attributes attached to the element. If there are no
* attributes, it shall be an empty Attributes object.
*/
public void startElement(String uri, String loc, String raw, Attributes a)
throws SAXException {
if (startExtracting(uri, loc, raw, a)) {
extractLevel++;
if (extractLevel == 1) {
startExtractedDocument(uri, loc, raw, a);
if (this.getLogger().isDebugEnabled()) {
getLogger().debug("extractLevel now " + extractLevel + ".");
}
} else {
if (this.getLogger().isDebugEnabled()) {
getLogger().debug("extractLevel now " + extractLevel + ".");
}
}
// Start the DOM document
this.currentBuilder = new DOMBuilder();
this.currentBuilder.startDocument();
Iterator itt = prefixMap.entrySet().iterator();
while (itt.hasNext()) {
Map.Entry entry = (Map.Entry)itt.next();
this.currentBuilder.startPrefixMapping(
(String)entry.getKey(),
(String)entry.getValue()
);
}
}
if (extractLevel == 0) {
super.startElement(uri,loc,raw,a);
} else {
this.currentBuilder.startElement(uri,loc,raw,a);
}
}
/**
* Receive notification of the end of an element. Uses
* endExtraction to determine whether to stop extracting or
* not. Calls endExtractedDocument with the extracted document.
*
* @param uri The Namespace URI, or the empty string if the element has no
* Namespace URI or if Namespace
* processing is not being performed.
* @param loc The local name (without prefix), or the empty string if
* Namespace processing is not being performed.
* @param raw The raw XML 1.0 name (with prefix), or the empty string if
* raw names are not available.
*/
public void endElement(String uri, String loc, String raw)
throws SAXException {
if (extractLevel == 0) {
super.endElement(uri,loc,raw);
} else {
this.currentBuilder.endElement(uri,loc,raw);
if (endExtracting(uri, loc, raw)) {
extractLevel--;
if (this.getLogger().isDebugEnabled()) {
getLogger().debug("extractLevel now " + extractLevel + ".");
}
if (extractLevel == 0) {
// finish building the fragment. remove existing prefix mappings.
Iterator itt = prefixMap.entrySet().iterator();
while (itt.hasNext()) {
Map.Entry entry = (Map.Entry) itt.next();
this.currentBuilder.endPrefixMapping(
(String)entry.getKey()
);
}
this.currentBuilder.endDocument();
endExtractedDocument(this.currentBuilder.getDocument());
if (this.getLogger().isDebugEnabled()) {
getLogger().debug("Stored document.");
}
}
}
}
}
/**
* Receive notification of character data.
*
* @param c The characters from the XML document.
* @param start The start position in the array.
* @param len The number of characters to read from the array.
*/
public void characters(char c[], int start, int len)
throws SAXException {
if (extractLevel == 0) {
super.characters(c,start,len);
} else {
this.currentBuilder.characters(c,start,len);
}
}
/**
* Receive notification of ignorable whitespace in element content.
*
* @param c The characters from the XML document.
* @param start The start position in the array.
* @param len The number of characters to read from the array.
*/
public void ignorableWhitespace(char c[], int start, int len)
throws SAXException {
if (extractLevel == 0) {
super.ignorableWhitespace(c,start,len);
} else {
this.currentBuilder.ignorableWhitespace(c,start,len);
}
}
/**
* Receive notification of a processing instruction.
*
* @param target The processing instruction target.
* @param data The processing instruction data, or null if none was
* supplied.
*/
public void processingInstruction(String target, String data)
throws SAXException {
if (extractLevel == 0) {
super.processingInstruction(target,data);
} else {
this.currentBuilder.processingInstruction(target,data);
}
}
/**
* Receive notification of a skipped entity.
*
* @param name The name of the skipped entity. If it is a parameter
* entity, the name will begin with '%'.
*/
public void skippedEntity(String name)
throws SAXException {
if (extractLevel == 0) {
super.skippedEntity(name);
} else {
this.currentBuilder.skippedEntity(name);
}
}
/**
* Report the start of DTD declarations, if any.
*
* @param name The document type name.
* @param publicId The declared public identifier for the external DTD
* subset, or null if none was declared.
* @param systemId The declared system identifier for the external DTD
* subset, or null if none was declared.
*/
public void startDTD(String name, String publicId, String systemId)
throws SAXException {
if (extractLevel == 0) {
super.startDTD(name,publicId,systemId);
} else {
throw new SAXException(
"Recieved startDTD after beginning fragment extraction process."
);
}
}
/**
* Report the end of DTD declarations.
*/
public void endDTD()
throws SAXException {
if (extractLevel == 0) {
super.endDTD();
} else {
throw new SAXException(
"Recieved endDTD after beginning fragment extraction process."
);
}
}
/**
* Report the beginning of an entity.
*
* @param name The name of the entity. If it is a parameter entity, the
* name will begin with '%'.
*/
public void startEntity(String name)
throws SAXException {
if (extractLevel == 0) {
super.startEntity(name);
} else {
this.currentBuilder.startEntity(name);
}
}
/**
* Report the end of an entity.
*
* @param name The name of the entity that is ending.
*/
public void endEntity(String name)
throws SAXException {
if (extractLevel == 0) {
super.endEntity(name);
} else {
this.currentBuilder.endEntity(name);
}
}
/**
* Report the start of a CDATA section.
*/
public void startCDATA()
throws SAXException {
if (extractLevel == 0) {
super.startCDATA();
} else {
this.currentBuilder.startCDATA();
}
}
/**
* Report the end of a CDATA section.
*/
public void endCDATA()
throws SAXException {
if (extractLevel == 0) {
super.endCDATA();
} else {
this.currentBuilder.endCDATA();
}
}
/**
* Report an XML comment anywhere in the document.
*
* @param ch An array holding the characters in the comment.
* @param start The starting position in the array.
* @param len The number of characters to use from the array.
*/
public void comment(char ch[], int start, int len)
throws SAXException {
if (extractLevel == 0) {
super.comment(ch,start,len);
} else {
this.currentBuilder.comment(ch,start,len);
}
}
/**
* Receive notification of the beginning of an element.
*
* @param uri The Namespace URI, or the empty string if the element has no
* Namespace URI or if Namespace
* processing is not being performed.
* @param loc The local name (without prefix), or the empty string if
* Namespace processing is not being performed.
* @param raw The raw XML 1.0 name (with prefix), or the empty string if
* raw names are not available.
* @param a The attributes attached to the element. If there are no
* attributes, it shall be an empty Attributes object.
* @return a <code>boolean</code> value to signal to start extracting
*/
abstract boolean startExtracting(String uri, String loc, String raw, Attributes
a);
/**
* Receive notification of the beginning of the extracted Document.
*
* @param uri The Namespace URI, or the empty string if the element has no
* Namespace URI or if Namespace
* processing is not being performed.
* @param loc The local name (without prefix), or the empty string if
* Namespace processing is not being performed.
* @param raw The raw XML 1.0 name (with prefix), or the empty string if
* raw names are not available.
* @param a The attributes attached to the element. If there are no
* attributes, it shall be an empty Attributes object.
*/
abstract void startExtractedDocument(String uri, String loc, String raw,
Attributes a);
/**
* Receive notification of the beginning of an element.
*
* @param uri The Namespace URI, or the empty string if the element has no
* Namespace URI or if Namespace
* processing is not being performed.
* @param loc The local name (without prefix), or the empty string if
* Namespace processing is not being performed.
* @param raw The raw XML 1.0 name (with prefix), or the empty string if
* @return a <code>boolean</code> value to signal to stop extracting
*/
abstract boolean endExtracting(String uri, String loc, String raw);
/**
* Receive notification of the end of the extracted Document.
*
* @param doc a <code>Document</code> value
*/
abstract void endExtractedDocument(Document doc);
}
1.1
xml-cocoon2/src/java/org/apache/cocoon/transformation/SimpleFormInstanceExtractionTransformer.java
Index: SimpleFormInstanceExtractionTransformer.java
===================================================================
/*
============================================================================
The Apache Software License, Version 1.1
============================================================================
Copyright (C) 1999-2002 The Apache Software Foundation. All rights reserved.
Redistribution and use in source and binary forms, with or without modifica-
tion, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
3. The end-user documentation included with the redistribution, if any, must
include the following acknowledgment: "This product includes software
developed by the Apache Software Foundation (http://www.apache.org/)."
Alternately, this acknowledgment may appear in the software itself, if
and wherever such third-party acknowledgments normally appear.
4. The names "Apache Cocoon" and "Apache Software Foundation" must not be
used to endorse or promote products derived from this software without
prior written permission. For written permission, please contact
[EMAIL PROTECTED]
5. Products derived from this software may not be called "Apache", nor may
"Apache" appear in their name, without prior written permission of the
Apache Software Foundation.
THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
This software consists of voluntary contributions made by many individuals
on behalf of the Apache Software Foundation and was originally created by
Stefano Mazzocchi <[EMAIL PROTECTED]>. For more information on the Apache
Software Foundation, please see <http://www.apache.org/>.
*/
package org.apache.cocoon.transformation;
import org.apache.avalon.framework.component.ComponentManager;
import org.apache.avalon.framework.component.ComponentSelector;
import org.apache.avalon.framework.component.ComponentException;
import org.apache.avalon.framework.component.Composable;
import org.apache.avalon.framework.configuration.Configurable;
import org.apache.avalon.framework.configuration.Configuration;
import org.apache.avalon.framework.configuration.ConfigurationException;
import org.apache.avalon.framework.parameters.Parameters;
import org.apache.avalon.excalibur.pool.Recyclable;
import org.apache.cocoon.components.modules.output.OutputModule;
import org.apache.cocoon.environment.SourceResolver;
import org.apache.cocoon.ProcessingException;
import org.apache.cocoon.xml.dom.DOMUtil;
import java.util.Map;
import java.io.IOException;
import org.w3c.dom.Document;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
/**
* This transformer sieves an incoming stream of xml and extracts a
* document fragment from it depending on a given tag and stores the
* fragment using an OutputModule with a name based an attribute of
* another enclosing tag. Default configuration fires on
* <form-instance/> and uses @name of enclosing <form/>
* tag. Default OutputModule is request-attr. This is usefull in
* conjunction with the SimpleFormTransformer when setting the
* InputModule for it to a chain of request-param and request-attr so
* that the extracted form instance data is used only when no similar
* request parameter exists.
*
* @author <a href="mailto:[EMAIL PROTECTED]";>Christian Haul</a>
* @version CVS $Id: SimpleFormInstanceExtractionTransformer.java,v 1.1 2002/12/16
11:02:38 haul Exp $
*/
public class SimpleFormInstanceExtractionTransformer extends
AbstractExtractionTransformer
implements Configurable, Composable, Recyclable {
protected class ElementData {
public String uri = null;
public String loc = null;
public String raw = null;
public ElementData() {
}
public ElementData(String uri, String loc, String raw) {
this.uri = uri;
this.loc = loc;
this.raw =raw;
}
public boolean equals(String uri, String loc, String raw) {
if (!this.uri.equals(uri))
return false;
if (!this.loc.equals(loc))
return false;
if (!this.raw.equals(raw))
return false;
return true;
}
}
protected final static String OUTPUT_MODULE_SELECTOR =
OutputModule.ROLE+"Selector";
ElementData startElement = null;
ElementData nameElement = null;
String qname = "name";
String instanceName = null;
String outputModuleName = "request-attr";
Configuration outputConf = null;
ComponentManager manager = null;
Map objectModel = null;
public void configure(Configuration config) throws ConfigurationException {
this.startElement = new ElementData();
this.startElement.uri = config.getChild("start").getAttribute("uri", "");
this.startElement.loc = config.getChild("start").getAttribute("local-name",
"form-instance");
this.startElement.raw = config.getChild("start").getAttribute("raw-name",
"form-instance");
this.nameElement = new ElementData();
this.nameElement.uri = config.getChild("name").getAttribute("uri", "");
this.nameElement.loc = config.getChild("name").getAttribute("local-name",
"form");
this.nameElement.raw = config.getChild("name").getAttribute("raw-name",
"form");
this.qname = config.getChild("name").getAttribute("name-attribute", "name");
this.outputConf = config.getChild("output");
this.outputModuleName =
this.outputConf.getAttribute("name",this.outputModuleName);
}
public void compose(ComponentManager manager) throws ComponentException {
this.manager = manager;
}
/** Setup the transformer. */
public void setup(SourceResolver resolver, Map objectModel, String src,
Parameters parameters)
throws ProcessingException, SAXException, IOException {
super.setup(resolver, objectModel, src, parameters);
this.objectModel = objectModel;
}
public void recycle() {
super.recycle();
this.instanceName = null;
}
/**
* Receive notification of the beginning of an element.
*
* @param uri The Namespace URI, or the empty string if the element has no
* Namespace URI or if Namespace
* processing is not being performed.
* @param loc The local name (without prefix), or the empty string if
* Namespace processing is not being performed.
* @param raw The raw XML 1.0 name (with prefix), or the empty string if
* raw names are not available.
* @param a The attributes attached to the element. If there are no
* attributes, it shall be an empty Attributes object.
* @return a <code>boolean</code> value to signal to start extracting
*/
public boolean startExtracting(String uri, String loc, String raw, Attributes a)
{
System.out.println("sE I :"+uri+"/"+loc+"/"+raw);
if (this.nameElement.equals(uri,loc,raw)) {
this.instanceName = a.getValue(this.qname);
System.out.println("sE II :"+uri+"/"+loc+"/"+raw+"/"+this.instanceName);
}
boolean res = this.startElement.equals(uri,loc,raw);
System.out.println("sE III :"+uri+"/"+loc+"/"+raw+"/"+res);
return res;
}
/**
* Receive notification of the beginning of the extracted Document.
*
* @param uri The Namespace URI, or the empty string if the element has no
* Namespace URI or if Namespace
* processing is not being performed.
* @param loc The local name (without prefix), or the empty string if
* Namespace processing is not being performed.
* @param raw The raw XML 1.0 name (with prefix), or the empty string if
* raw names are not available.
* @param a The attributes attached to the element. If there are no
* attributes, it shall be an empty Attributes object.
*/
public void startExtractedDocument(String uri, String loc, String raw,
Attributes a) {
System.out.println("sED I :"+uri+"/"+loc+"/"+raw);
}
/**
* Receive notification of the beginning of an element.
*
* @param uri The Namespace URI, or the empty string if the element has no
* Namespace URI or if Namespace
* processing is not being performed.
* @param loc The local name (without prefix), or the empty string if
* Namespace processing is not being performed.
* @param raw The raw XML 1.0 name (with prefix), or the empty string if
* @return a <code>boolean</code> value to signal to stop extracting
*/
public boolean endExtracting(String uri, String loc, String raw) {
System.out.println("eE I :"+uri+"/"+loc+"/"+raw);
boolean res = this.startElement.equals(uri,loc,raw);
System.out.println("eE I :"+uri+"/"+loc+"/"+raw);
return res;
}
/**
* Receive notification of the end of the extracted Document.
*
* @param doc a <code>Document</code> value
*/
public void endExtractedDocument(Document doc) {
ComponentSelector outputSelector = null;
OutputModule output = null;
System.out.println("eED I :"+DOMUtil.node2String(doc, true));
try {
outputSelector = (ComponentSelector)
this.manager.lookup(OUTPUT_MODULE_SELECTOR);
if (outputSelector.hasComponent(this.outputModuleName)) {
output = (OutputModule) outputSelector.select(this.outputModuleName);
}
output.setAttribute(outputConf, this.objectModel, this.instanceName,
doc);
output.commit(outputConf, this.objectModel);
} catch (Exception e) {
} finally {
if (outputSelector != null) {
if (output != null) {
outputSelector.release(output);
output = null;
}
this.manager.release(outputSelector);
}
}
this.instanceName = null;
}
}
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