/***
* Copyright (c) 2009 Caelum - www.caelum.com.br/opensource 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 br.com.caelum.vraptor.serialization.xstream;
import java.io.Writer;
import java.util.Arrays;
import java.util.Collections;
import br.com.caelum.vraptor.interceptor.DefaultTypeNameExtractor;
import br.com.caelum.vraptor.interceptor.TypeNameExtractor;
import br.com.caelum.vraptor.ioc.Component;
import br.com.caelum.vraptor.ioc.PrototypeScoped;
import com.thoughtworks.xstream.XStream;
import com.thoughtworks.xstream.converters.Converter;
import com.thoughtworks.xstream.converters.SingleValueConverter;
import com.thoughtworks.xstream.io.HierarchicalStreamDriver;
import com.thoughtworks.xstream.io.HierarchicalStreamWriter;
import com.thoughtworks.xstream.io.json.JsonHierarchicalStreamDriver;
import com.thoughtworks.xstream.io.json.JsonWriter;
import com.thoughtworks.xstream.mapper.MapperWrapper;
/**
* Implementation of default XStream configuration
*
* @author Rafael Viana
* @since 3.4.0
*/
@PrototypeScoped
@Component
public class XStreamBuilderImpl implements XStreamBuilder {
private final XStreamConverters converters;
private final TypeNameExtractor extractor;
private boolean indented;
private boolean withoutRoot;
public XStreamBuilderImpl(XStreamConverters converters, TypeNameExtractor extractor) {
this.converters = converters;
this.extractor = extractor;
}
public static XStreamBuilder cleanInstance(Converter...converters) {
return new XStreamBuilderImpl(
new XStreamConverters(Arrays.asList(converters), Collections.<SingleValueConverter>emptyList()),
new DefaultTypeNameExtractor());
}
public XStream xmlInstance() {
XStream xstream = new XStream() {
{setMode(NO_REFERENCES);}
@Override
protected MapperWrapper wrapMapper(MapperWrapper next) {
return new VRaptorClassMapper(next, extractor);
}
};
converters.registerComponents(xstream);
return xstream;
}
protected static final String DEFAULT_NEW_LINE = "";
protected static final char[] DEFAULT_LINE_INDENTER = {};
protected static final String INDENTED_NEW_LINE = "\n";
protected static final char[] INDENTED_LINE_INDENTER = { ' ', ' '};
public XStream jsonInstance() {
XStream xstream = new XStream(getHierarchicalStreamDriver()) {
{setMode(NO_REFERENCES);}
@Override
protected MapperWrapper wrapMapper(MapperWrapper next) {
return new VRaptorClassMapper(next, extractor);
}
};
converters.registerComponents(xstream);
return xstream;
}
/**
* You can override this method for configuring Driver before serialization
* @return configured hierarchical driver
*/
protected HierarchicalStreamDriver getHierarchicalStreamDriver() {
final String newLine = (indented ? INDENTED_NEW_LINE : DEFAULT_NEW_LINE);
final char[] lineIndenter = (indented ? INDENTED_LINE_INDENTER : DEFAULT_LINE_INDENTER);
return new JsonHierarchicalStreamDriver() {
public HierarchicalStreamWriter createWriter(Writer writer) {
if (withoutRoot) {
return new JsonWriter(writer, lineIndenter, newLine, JsonWriter.DROP_ROOT_MODE);
}
return new JsonWriter(writer, lineIndenter, newLine);
}
};
}
public XStreamBuilder indented() {
indented = true;
return this;
}
public XStreamBuilder withoutRoot() {
withoutRoot = true;
return this;
}
}