/*
============================================================================
The Apache Software License, Version 1.1
============================================================================
Copyright (C) 1999-2003 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
apache@apache.org.
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 <stefano@apache.org>. For more information on the Apache
Software Foundation, please see <http://www.apache.org/>.
*/
package org.apache.cocoon.transformation;
import java.util.HashMap;
import java.util.Map;
import org.apache.avalon.excalibur.pool.Poolable;
import org.apache.avalon.excalibur.pool.Recyclable;
import org.apache.avalon.framework.activity.Disposable;
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.framework.service.ServiceManager;
import org.apache.avalon.framework.service.ServiceSelector;
import org.apache.avalon.framework.service.Serviceable;
import org.apache.cocoon.components.web3.Web3;
import org.apache.cocoon.components.web3.Web3Client;
import org.apache.cocoon.components.web3.Web3DataSource;
import org.apache.cocoon.components.web3.Web3Streamer;
import org.apache.cocoon.environment.SourceResolver;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.AttributesImpl;
import com.sap.mw.jco.IFunctionTemplate;
import com.sap.mw.jco.JCO;
/**
* TBD
*
* @author <a href="mailto:michael.gerzabek@at.efp.cc">Michael Gerzabek</a>
* @since 2.1
* @version CVS $Id: Web3RfcTransformer.java,v 1.8 2004/02/06 22:54:05 joerg Exp $
*/
public class Web3RfcTransformer extends AbstractTransformer
implements Serviceable, Disposable, Configurable, Poolable, Recyclable {
/** The service manager instance */
protected ServiceManager manager = null;
protected Web3DataSource web3source = null;
protected Web3Client connection = null;
protected JCO.Repository repository = null;
protected IFunctionTemplate functionT = null;
protected JCO.Function function = null;
protected JCO.ParameterList importParameterList = null;
protected JCO.ParameterList tablesParameterList = null;
protected JCO.Record theRecord = null;
protected JCO.Field fillMe = null;
protected AttributesImpl attributes = new AttributesImpl();
protected int startcount = 0;
protected boolean error = false;
protected String backend = null;
protected String default_backend = null;
protected String streamer = null;
protected HashMap tags = new HashMap();
public void setup(SourceResolver resolver, Map objectModel,
String source, Parameters parameters)
throws SAXException {
try {
backend = parameters.getParameter("system");
}
catch (Exception x) {
if ( null == backend ) {
getLogger().warn("No backend configured! Try to use configuration");
backend = default_backend;
}
}
}
public void service(ServiceManager manager) {
this.manager = manager;
initTags();
}
public void configure(final Configuration configuration)
throws ConfigurationException {
this.default_backend = configuration.getChild("system").getValue(null);
}
public void recycle() {
this.connection = null;
this.repository = null;
this.functionT = null;
this.function = null;
this.importParameterList = null;
this.tablesParameterList = null;
this.theRecord = null;
this.backend = null;
this.streamer = null;
this.error = false;
this.startcount = 0;
super.recycle();
}
/** Free all ressources */
public void dispose() {
this.manager = null;
this.attributes = null;
this.web3source = null;
this.tags = null;
}
/**
* Receive notification of the beginning of a document.
*/
public void startDocument()
throws SAXException {
if ( null != super.contentHandler ) {
super.contentHandler.startDocument();
}
}
/**
* Receive notification of the end of a document.
*/
public void endDocument()
throws SAXException {
if ( null != super.contentHandler) {
super.contentHandler.endDocument();
}
}
/**
* Receive notification of the beginning of an element.
*/
public void startElement(String uri, String loc, String raw, Attributes a)
throws SAXException {
if ( Web3.URI.equals( uri ) && !this.error ) {
switch ( Integer.parseInt( (String) this.tags.get( loc ))) {
case INCLUDE_ELEM:
ServiceSelector r3sc = null;
try {
r3sc = (ServiceSelector)
this.manager.lookup ( Web3DataSource.ROLE + "Selector");
this.web3source = (Web3DataSource) r3sc.select( this.backend );
this.connection = this.web3source.getWeb3Client();
this.repository = (JCO.Repository) this.connection.getRepository();
this.functionT = this.repository.getFunctionTemplate(
a.getValue( Web3.INCLUDE_NAME_ATTR ) );
this.streamer = (null == a.getValue( Web3.INCLUDE_CLASS_ATTR )) ?
"default" : a.getValue( Web3.INCLUDE_CLASS_ATTR );
this.function = this.functionT.getFunction();
}
catch (Exception ex) {
String error = "Problems getting client for backend: '"
+ this.backend + "'";
getLogger().error (error, ex);
error = ex.getMessage();
attributes.clear();
super.contentHandler.startElement(uri, loc, raw, a);
super.contentHandler.startElement(uri, Web3.PROCESSING_X_ELEM,
Web3.PROCESSING_X_ELEM, attributes);
super.contentHandler.characters(error.toCharArray(), 0,
error.length());
super.contentHandler.endElement(uri, Web3.PROCESSING_X_ELEM,
Web3.PROCESSING_X_ELEM);
this.error = true;
}
finally {
this.manager.release ( r3sc );
}
break;
case IMPORT_ELEM:
this.importParameterList = this.function.getImportParameterList();
this.theRecord = this.importParameterList;
break;
case FIELD_ELEM:
this.fillMe = this.theRecord.getField(
a.getValue( Web3.FIELD_NAME_ATTR ));
break;
case STRUCTURE_ELEM:
this.theRecord = this.importParameterList.getStructure(
a.getValue( Web3.STRUCTURE_NAME_ATTR ));
break;
case TABLES_ELEM:
this.tablesParameterList = this.function.getTableParameterList();
break;
case TABLE_ELEM:
this.theRecord = this.tablesParameterList.getTable(
a.getValue( Web3.TABLE_NAME_ATTR ));
break;
case ROW_ELEM:
if (null != this.theRecord) {
try {
JCO.Table tmpTable = (JCO.Table) this.theRecord;
tmpTable.appendRow();
}
catch (ClassCastException x) {
getLogger().error("Not a table! " + x.getMessage(), x);
}
}
break;
default:
getLogger().error("Invalid element " + loc);
}
}
else if (super.contentHandler != null) {
super.contentHandler.startElement(uri, loc, raw, a);
}
}
/**
* Receive notification of the end of an element.
*/
public void characters(char c[], int start, int len)
throws SAXException {
String theValue = new String(c, start, len).trim();
if ( null != this.fillMe ) {
if ( "".equals( theValue )) {
theValue = null;
}
try {
this.fillMe.setValue( theValue );
this.fillMe = null;
if( getLogger().isDebugEnabled() ) {
getLogger().debug("set value = " + theValue);
}
}
catch (JCO.ConversionException x) {
getLogger().error( x.getMessage(), x);
}
}
else {
if (super.contentHandler != null) {
super.contentHandler.characters(c, start, len);
}
}
}
/**
* Receive notification of the end of an element.
*/
public void endElement(String uri, String loc, String raw)
throws SAXException
{
if ( Web3.URI.equals(uri) && !this.error ) {
switch ( Integer.parseInt( (String) this.tags.get( loc ))) {
case INCLUDE_ELEM:
Web3Streamer w3s = null;
ServiceSelector streamerSelector = null;
try {
this.connection.execute( this.function );
streamerSelector =
(ServiceSelector)
this.manager.lookup( Web3Streamer.ROLE + "Selector" );
w3s = (Web3Streamer) streamerSelector.select( this.streamer );
w3s.stream( this.function, super.contentHandler );
}
catch (Exception x) {
this.attributes.clear();
super.contentHandler.startElement(uri, Web3.ABAP_EXCEPTION_ELEM,
Web3.ABAP_EXCEPTION_ELEM, this.attributes);
super.contentHandler.characters(x.getMessage ().toCharArray(),
0, x.getMessage ().length());
super.contentHandler.endElement(uri, Web3.ABAP_EXCEPTION_ELEM,
Web3.ABAP_EXCEPTION_ELEM);
getLogger().error(x.getMessage(), x);
}
finally {
this.web3source.releaseWeb3Client( this.connection );
if ( null != streamerSelector ) {
streamerSelector.release( w3s );
}
manager.release( streamerSelector );
}
this.connection = null;
this.repository = null;
this.functionT = null;
this.function = null;
this.importParameterList = null;
this.tablesParameterList = null;
this.theRecord = null;
break;
case STRUCTURE_ELEM:
this.theRecord = this.importParameterList;
break;
}
}
else if (super.contentHandler != null) {
super.contentHandler.endElement(uri,loc,raw);
}
}
protected final static int INCLUDE_ELEM = 1;
protected final static int IMPORT_ELEM = 2;
protected final static int EXPORT_ELEM = 3;
protected final static int TABLES_ELEM = 4;
protected final static int FIELD_ELEM = 5;
protected final static int ROW_ELEM = 6;
protected final static int STRUCTURE_ELEM = 7;
protected final static int TABLE_ELEM = 8;
protected void initTags() {
this.tags.put( Web3.INCLUDE_ELEM, "1" );
this.tags.put( Web3.IMPORT_ELEM, "2" );
this.tags.put( Web3.EXPORT_ELEM, "3" );
this.tags.put( Web3.TABLES_ELEM, "4" );
this.tags.put( Web3.FIELD_ELEM, "5" );
this.tags.put( Web3.ROW_ELEM, "6" );
this.tags.put( Web3.STRUCTURE_ELEM, "7" );
this.tags.put( Web3.TABLE_ELEM, "8" );
}
}