| /* |
| * Copyright 1999-2004 The Apache Software Foundation. |
| * |
| * Licensed 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.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 1.9 2004/03/05 13:02:26 bdelacretaz 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" ); |
| } |
| } |
| |
