/*
* Copyright 2011 the original author or authors.
*
* 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 net.javacrumbs.json2xml;
import com.fasterxml.jackson.core.JsonFactory;
import com.fasterxml.jackson.core.JsonParser;
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 java.io.IOException;
/**
* Helper class that can be used for JSON -> XML transformation.
* <pre>
* Transformer transformer = TransformerFactory.newInstance().newTransformer();
* InputSource source = new InputSource(...);
* Result result = ...;
* transformer.transform(new SAXSource(new JsonXmlReader(namespace),source), result);
* </pre>
*/
public class JsonXmlReader implements XMLReader {
private ContentHandler contentHandler;
private final String namespaceUri;
private final boolean addTypeAttributes;
private final String artificialRootName;
private final ElementNameConverter elementNameConverter;
/**
* Creates JsonXmlReader
*/
public JsonXmlReader() {
this("");
}
/**
* Creates JsonXmlReader
* @param namespaceUri namespace uri of the resulting XML.
*/
public JsonXmlReader(String namespaceUri) {
this(namespaceUri, false);
}
/**
* Creates JsonXmlReader
* @param namespaceUri namespace uri of the resulting XML.
* @param addTypeAttributes if true adds attributes with type info
*/
public JsonXmlReader(String namespaceUri, boolean addTypeAttributes) {
this(namespaceUri, addTypeAttributes, null);
}
/**
* Creates JsonXmlReader
* @param namespaceUri namespace uri of the resulting XML.
* @param addTypeAttributes if true adds attributes with type info
* @param artificialRootName if set, an artificial root is generated so JSON documents with more roots can be handeled.
*/
public JsonXmlReader(String namespaceUri, boolean addTypeAttributes, String artificialRootName) {
this(namespaceUri, addTypeAttributes, artificialRootName, null);
}
/**
* Creates JsonXmlReader
* @param namespaceUri namespace uri of the resulting XML.
* @param addTypeAttributes if true adds attributes with type info
* @param artificialRootName if set, an artificial root is generated so JSON documents with more roots can be handled.
* @param elementNameConverter converter to convert JSON object names to valid XML element names
*/
public JsonXmlReader(String namespaceUri, boolean addTypeAttributes, String artificialRootName, ElementNameConverter elementNameConverter) {
this.namespaceUri = namespaceUri;
this.addTypeAttributes = addTypeAttributes;
this.artificialRootName = artificialRootName;
this.elementNameConverter = elementNameConverter;
}
public boolean getFeature(String name) throws SAXNotRecognizedException, SAXNotSupportedException {
throw new UnsupportedOperationException();
}
public void setFeature(String name, boolean value) throws SAXNotRecognizedException, SAXNotSupportedException {
}
public Object getProperty(String name) throws SAXNotRecognizedException, SAXNotSupportedException {
throw new UnsupportedOperationException();
}
public void setProperty(String name, Object value) throws SAXNotRecognizedException, SAXNotSupportedException {
//ignore
}
public void setEntityResolver(EntityResolver resolver) {
//ignore
}
public EntityResolver getEntityResolver() {
throw new UnsupportedOperationException();
}
public void setDTDHandler(DTDHandler handler) {
//ignore
}
public DTDHandler getDTDHandler() {
throw new UnsupportedOperationException();
}
public void setContentHandler(ContentHandler handler) {
this.contentHandler = handler;
}
public ContentHandler getContentHandler() {
return contentHandler;
}
public void setErrorHandler(ErrorHandler handler) {
//ignore
}
public ErrorHandler getErrorHandler() {
throw new UnsupportedOperationException();
}
public void parse(InputSource input) throws IOException, SAXException {
JsonParser jsonParser = new JsonFactory().createParser(input.getCharacterStream());
new JsonSaxAdapter(jsonParser, contentHandler, namespaceUri, addTypeAttributes, artificialRootName, elementNameConverter).parse();
}
public void parse(String systemId) throws IOException, SAXException {
throw new UnsupportedOperationException();
}
public String getNamespaceUri() {
return namespaceUri;
}
}