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/**
*
* 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.tuscany.sdo.helper;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.Reader;
import java.io.StringReader;
import java.io.StringWriter;
import java.io.Writer;
import java.util.Map;
import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.dom.DOMResult;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.sax.SAXResult;
import javax.xml.transform.sax.SAXSource;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;
import org.eclipse.emf.ecore.util.ExtendedMetaData;
import org.xml.sax.InputSource;
import commonj.sdo.DataObject;
import commonj.sdo.helper.HelperContext;
import commonj.sdo.helper.XMLDocument;
import commonj.sdo.helper.XMLHelper;
/**
* A helper to convert XML documents into DataObects and DataObjects into XML
* documnets.
*/
public class XMLHelperImpl implements XMLHelper {
protected HelperContext helperContext;
private ExtendedMetaData extendedMetaData;
public XMLHelperImpl(HelperContext hc) {
this.helperContext = hc;
this.extendedMetaData = ((HelperContextImpl)hc).extendedMetaData;
}
public XMLDocument load(String inputString) {
try {
return load(new StringReader(inputString), null, null);
} catch (IOException e) {
throw new RuntimeException(e); // should never happen
}
}
public XMLDocument load(String inputString, Object options) {
try {
return load(new StringReader(inputString), null, options);
} catch (IOException e) {
throw new RuntimeException(e); // should never happen
}
}
public XMLDocument load(InputStream inputStream) throws IOException {
return load(inputStream, null, null);
}
private Object checkSetOptions(Object options) throws IOException {
if (options != null && !(options instanceof Map)) {
throw new IOException("Invalid load options!");
}
if (helperContext != null) {
return ((HelperContextImpl)helperContext).getMergedOption((Map)options);
} else {// null is acceptable as it will be ignored
return options;
}
}
public XMLDocument load(InputStream inputStream, String locationURI, Object options) throws IOException {
options = checkSetOptions(options);
XMLDocumentImpl document = new XMLDocumentImpl(extendedMetaData, options);
document.load(inputStream, locationURI, options);
return document;
}
public XMLDocument load(Reader inputReader, String locationURI, Object options) throws IOException {
XMLDocumentImpl document = new XMLDocumentImpl(extendedMetaData, options);
options = checkSetOptions(options);
document.load(inputReader, locationURI, options);
return document;
}
public XMLDocument load(Source source, String locationURI, Object options) throws IOException {
options = checkSetOptions(options);
if (source instanceof DOMSource) {
DOMSource domSource = (DOMSource)source;
XMLDocumentImpl document = new XMLDocumentImpl(extendedMetaData, options);
document.load(domSource.getNode(), options);
return document;
} else if (source instanceof SAXSource) {
XMLDocumentImpl document = new XMLDocumentImpl(extendedMetaData, options);
InputSource inputSource = SAXSource.sourceToInputSource(source);
document.load(inputSource, locationURI, options);
return document;
} else if (source instanceof StreamSource) {
return load(((StreamSource)source).getInputStream(), locationURI, options);
} else {
throw new UnsupportedOperationException();
}
}
public String save(DataObject dataObject, String rootElementURI, String rootElementName) {
StringWriter stringWriter = new StringWriter();
try {
save(createDocument(dataObject, rootElementURI, rootElementName), stringWriter, null);
return stringWriter.toString();
} catch (IOException e) {
throw new RuntimeException(e); // should never happen
}
}
public String save(DataObject dataObject, String rootElementURI, String rootElementName, Object options) {
StringWriter stringWriter = new StringWriter();
try {
save(createDocument(dataObject, rootElementURI, rootElementName), stringWriter, options);
return stringWriter.toString();
} catch (IOException e) {
throw new RuntimeException(e); // should never happen
}
}
public void save(DataObject dataObject, String rootElementURI, String rootElementName, OutputStream outputStream)
throws IOException {
save(createDocument(dataObject, rootElementURI, rootElementName), outputStream, null);
}
public void save(DataObject dataObject,
String rootElementURI,
String rootElementName,
OutputStream outputStream,
Object options) throws IOException {
save(createDocument(dataObject, rootElementURI, rootElementName), outputStream, null);
}
public void save(XMLDocument xmlDocument, OutputStream outputStream, Object options) throws IOException {
options = checkSetOptions(options);
((XMLDocumentImpl)xmlDocument).save(outputStream, options);
}
public void save(XMLDocument xmlDocument, Writer outputWriter, Object options) throws IOException {
options = checkSetOptions(options);
((XMLDocumentImpl)xmlDocument).save(outputWriter, options);
}
public void save(XMLDocument xmlDocument, Result outputResult, Object options) throws IOException {
options = checkSetOptions(options);
if (outputResult instanceof DOMResult) {
((XMLDocumentImpl)xmlDocument).save(((DOMResult)outputResult).getNode(), options);
} else if (outputResult instanceof SAXResult) {
throw new UnsupportedOperationException();
} else if (outputResult instanceof StreamResult) {
save(xmlDocument, ((StreamResult)outputResult).getOutputStream(), options);
} else {
throw new UnsupportedOperationException();
}
}
public XMLDocument createDocument(DataObject dataObject, String rootElementURI, String rootElementName) {
XMLDocument xmlDocument = new XMLDocumentImpl(extendedMetaData, dataObject, rootElementURI, rootElementName);
xmlDocument.setEncoding("UTF-8");
return xmlDocument;
}
public HelperContext getHelperContext() {
return helperContext;
}
}
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