| /* |
| * Copyright (c) 2012, Paul Merlin. All Rights Reserved. |
| * |
| * 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.qi4j.valueserialization.stax; |
| |
| import java.io.OutputStream; |
| import javax.xml.stream.XMLOutputFactory; |
| import javax.xml.stream.XMLStreamWriter; |
| import org.apache.commons.lang.StringEscapeUtils; |
| import org.qi4j.spi.value.ValueSerializerAdapter; |
| |
| /** |
| * ValueSerializer producing Values state as XML documents. |
| */ |
| public class StaxValueSerializer |
| extends ValueSerializerAdapter<XMLStreamWriter> |
| { |
| |
| private final XMLOutputFactory outputFactory = XMLOutputFactory.newInstance(); |
| |
| public StaxValueSerializer() |
| { |
| // Output Factory setup |
| outputFactory.setProperty( "javax.xml.stream.isRepairingNamespaces", Boolean.FALSE ); |
| } |
| |
| @Override |
| protected XMLStreamWriter adaptOutput( OutputStream output ) |
| throws Exception |
| { |
| XMLStreamWriter xmlStreamWriter = outputFactory.createXMLStreamWriter( output, "UTF-8" ); |
| xmlStreamWriter.writeStartDocument( "utf-8", "1.1" ); |
| return xmlStreamWriter; |
| } |
| |
| @Override |
| protected void onSerializationEnd( Object object, XMLStreamWriter output ) |
| throws Exception |
| { |
| output.writeEndDocument(); |
| output.flush(); |
| output.close(); |
| } |
| |
| @Override |
| protected void onArrayStart( XMLStreamWriter output ) |
| throws Exception |
| { |
| output.writeStartElement( "array" ); |
| } |
| |
| @Override |
| protected void onArrayEnd( XMLStreamWriter output ) |
| throws Exception |
| { |
| output.writeEndElement(); |
| } |
| |
| @Override |
| protected void onObjectStart( XMLStreamWriter output ) |
| throws Exception |
| { |
| output.writeStartElement( "object" ); |
| } |
| |
| @Override |
| protected void onObjectEnd( XMLStreamWriter output ) |
| throws Exception |
| { |
| output.writeEndElement(); |
| } |
| |
| @Override |
| protected void onFieldStart( XMLStreamWriter output, String key ) |
| throws Exception |
| { |
| output.writeStartElement( "field" ); |
| output.writeStartElement( "name" ); |
| output.writeCharacters( key ); |
| output.writeEndElement(); |
| } |
| |
| @Override |
| protected void onFieldEnd( XMLStreamWriter output ) |
| throws Exception |
| { |
| output.writeEndElement(); |
| } |
| |
| @Override |
| protected void onValueStart( XMLStreamWriter output ) |
| throws Exception |
| { |
| output.writeStartElement( "value" ); |
| } |
| |
| @Override |
| protected void onValue( XMLStreamWriter output, Object value ) |
| throws Exception |
| { |
| if( value == null ) |
| { |
| output.writeStartElement( "null" ); |
| output.writeEndElement(); |
| } |
| else |
| { |
| output.writeCharacters( StringEscapeUtils.escapeXml( value.toString() ) ); |
| } |
| } |
| |
| @Override |
| protected void onValueEnd( XMLStreamWriter output ) |
| throws Exception |
| { |
| output.writeEndElement(); |
| } |
| } |