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/*
Milyn - Copyright (C) 2006 - 2010
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License (version 2.1) as published by the Free Software
Foundation.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU Lesser General Public License for more details:
http://www.gnu.org/licenses/lgpl.txt
*/
package org.milyn.edisax.unedifact;
import java.io.IOException;
import java.net.URI;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.Map;
import javax.xml.XMLConstants;
import org.milyn.assertion.AssertArgument;
import org.milyn.edisax.BufferedSegmentReader;
import org.milyn.edisax.EDIConfigurationException;
import org.milyn.edisax.EDIParser;
import org.milyn.edisax.interchange.ControlBlockHandlerFactory;
import org.milyn.edisax.unedifact.handlers.r41.UNEdifact41ControlBlockHandlerFactory;
import org.milyn.edisax.util.EDIUtils;
import org.milyn.edisax.interchange.ControlBlockHandler;
import org.milyn.edisax.interchange.InterchangeContext;
import org.milyn.edisax.model.EdifactModel;
import org.milyn.edisax.model.internal.Delimiters;
import org.milyn.edisax.model.internal.Description;
import org.milyn.xml.hierarchy.HierarchyChangeListener;
import org.milyn.xml.hierarchy.HierarchyChangeReader;
import org.xml.sax.ContentHandler;
import org.xml.sax.DTDHandler;
import org.xml.sax.EntityResolver;
import org.xml.sax.ErrorHandler;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.SAXNotRecognizedException;
import org.xml.sax.SAXNotSupportedException;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.AttributesImpl;
/**
* UN/EDIFACT Interchange Envelope parser.
*
* @author [email protected]
*/
public class UNEdifactInterchangeParser implements XMLReader, HierarchyChangeReader {
private Map features = new HashMap();
public static final Delimiters defaultUNEdifactDelimiters = new Delimiters().setSegment("'").setField("+").setComponent(":").setEscape("?").setDecimalSeparator(".");
private Map mappingModels = new LinkedHashMap();
private ContentHandler contentHandler;
private HierarchyChangeListener hierarchyChangeListener;
private InterchangeContext interchangeContext;
public void parse(InputSource unedifactInterchange) throws IOException, SAXException {
AssertArgument.isNotNull(unedifactInterchange, "unedifactInterchange");
if(contentHandler == null) {
throw new IllegalStateException("'contentHandler' not set. Cannot parse EDI stream.");
}
if(mappingModels == null || mappingModels.isEmpty()) {
throw new IllegalStateException("'mappingModels' not set. Cannot parse EDI stream.");
}
try {
BufferedSegmentReader segmentReader = new BufferedSegmentReader(unedifactInterchange, defaultUNEdifactDelimiters);
boolean validate = getFeature(EDIParser.FEATURE_VALIDATE);
String segCode;
segmentReader.mark();
segmentReader.setIgnoreNewLines(getFeature(EDIParser.FEATURE_IGNORE_NEWLINES));
contentHandler.startDocument();
contentHandler.startElement(XMLConstants.NULL_NS_URI, "unEdifact", "unEdifact", new AttributesImpl());
while(true) {
segCode = segmentReader.peek(3, true);
if(segCode.length() == 3) {
ControlBlockHandlerFactory controlBlockHandlerFactory = new UNEdifact41ControlBlockHandlerFactory(hierarchyChangeListener);
interchangeContext = createInterchangeContext(segmentReader, validate, controlBlockHandlerFactory);
ControlBlockHandler handler = controlBlockHandlerFactory.getControlBlockHandler(segCode);
interchangeContext.indentDepth.value++;
handler.process(interchangeContext);
interchangeContext.indentDepth.value--;
} else {
break;
}
}
contentHandler.characters(new char[] {'\n'}, 0, 1);
contentHandler.endElement(XMLConstants.NULL_NS_URI, "unEdifact", "unEdifact");
contentHandler.endDocument();
} finally {
contentHandler = null;
}
}
protected InterchangeContext createInterchangeContext(BufferedSegmentReader segmentReader, boolean validate, ControlBlockHandlerFactory controlBlockHandlerFactory) {
return new InterchangeContext(segmentReader, mappingModels, contentHandler, controlBlockHandlerFactory, validate);
}
public InterchangeContext getInterchangeContext() {
return interchangeContext;
}
public Map getMappingModels() {
return mappingModels;
}
/**
* Set the EDI mapping model to be used in all subsequent parse operations.
*
* The model can be generated through a call to the {@link EDIParser}.
*
* @param mappingModels The mapping model.
* @return This parser instance.
*/
public UNEdifactInterchangeParser setMappingModels(Map mappingModels) {
AssertArgument.isNotNullAndNotEmpty(mappingModels, "mappingModels");
this.mappingModels = mappingModels;
return this;
}
/**
* Add EDI mapping model to be used in all subsequent parse operations.
*
* The model can be generated through a call to the {@link EDIParser}.
*
* @param mappingModels The mapping model.
* @return This parser instance.
*/
public UNEdifactInterchangeParser addMappingModels(Map mappingModels) {
AssertArgument.isNotNullAndNotEmpty(mappingModels, "mappingModels");
this.mappingModels.putAll(mappingModels);
return this;
}
/**
* Add EDI mapping model to be used in all subsequent parse operations.
*
* @param mappingModelFiles Semi-colon separated list of mapping model files. Supports zip files.
* @param baseURI The base URI against which the mapping model URIs is to be resolved.
*
* @return This parser instance.
* @throws EDIConfigurationException Error processing one of the Mapping Model configs.
* @throws SAXException
* @throws IOException
*/
public UNEdifactInterchangeParser addMappingModels(String mappingModelFiles, URI baseURI) throws EDIConfigurationException, IOException, SAXException {
EDIUtils.loadMappingModels(mappingModelFiles, mappingModels, baseURI);
return this;
}
/**
* Add EDI mapping model to be used in all subsequent parse operations.
*
* The model can be generated through a call to the {@link EDIParser}.
*
* @param mappingModel The mapping model.
* @return This parser instance.
*/
public UNEdifactInterchangeParser addMappingModel(EdifactModel mappingModel) {
AssertArgument.isNotNull(mappingModel, "mappingModel");
this.mappingModels.put(mappingModel.getEdimap().getDescription(), mappingModel);
return this;
}
public ContentHandler getContentHandler() {
return contentHandler;
}
public void setContentHandler(ContentHandler contentHandler) {
this.contentHandler = contentHandler;
}
public void ignoreNewLines(boolean ignoreNewLines) {
setFeature(EDIParser.FEATURE_IGNORE_NEWLINES, ignoreNewLines);
}
public void validate(boolean validate) {
setFeature(EDIParser.FEATURE_VALIDATE, validate);
}
public void setFeature(String name, boolean value) {
features.put(name, value);
}
public boolean getFeature(String name) throws SAXNotRecognizedException, SAXNotSupportedException {
Boolean feature = features.get(name);
if(feature == null) {
return false;
}
return feature;
}
public void setHierarchyChangeListener(HierarchyChangeListener listener) {
this.hierarchyChangeListener = listener;
}
/****************************************************************************
*
* The following methods are currently unimplemnted...
*
****************************************************************************/
public void parse(String systemId) throws IOException, SAXException {
throw new UnsupportedOperationException("Operation not supports by this reader.");
}
public DTDHandler getDTDHandler() {
return null;
}
public void setDTDHandler(DTDHandler arg0) {
}
public EntityResolver getEntityResolver() {
return null;
}
public void setEntityResolver(EntityResolver arg0) {
}
public ErrorHandler getErrorHandler() {
return null;
}
public void setErrorHandler(ErrorHandler arg0) {
}
public Object getProperty(String name) throws SAXNotRecognizedException, SAXNotSupportedException {
return null;
}
public void setProperty(String name, Object value) throws SAXNotRecognizedException, SAXNotSupportedException {
}
}
