/*
* Copyright 2004-2008 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 org.grails.web.converters.configuration;
import groovy.lang.Closure;
import java.util.ArrayList;
import java.util.List;
import java.util.SortedSet;
import java.util.TreeSet;
import java.util.concurrent.atomic.AtomicInteger;
import grails.core.support.proxy.DefaultProxyHandler;
import grails.core.support.proxy.ProxyHandler;
import org.grails.web.converters.Converter;
import org.grails.web.converters.marshaller.ClosureObjectMarshaller;
import org.grails.web.converters.marshaller.ObjectMarshaller;
/**
* Mutable Converter Configuration with an priority sorted set of ObjectMarshallers
*
* @author Siegfried Puchbauer
* @since 1.1
*/
@SuppressWarnings("rawtypes")
public class DefaultConverterConfiguration<C extends Converter> implements ConverterConfiguration<C> {
public static final int DEFAULT_PRIORITY = 0;
private static final AtomicInteger MARSHALLER_SEQUENCE = new AtomicInteger(0);
private ConverterConfiguration<C> delegate;
private String encoding;
private boolean prettyPrint = false;
private final SortedSet<Entry> objectMarshallers = new TreeSet<Entry>();
private Converter.CircularReferenceBehaviour circularReferenceBehaviour;
private ProxyHandler proxyHandler;
private boolean cacheObjectMarshallerByClass = true;
public String getEncoding() {
return encoding != null ? encoding : (delegate != null ? delegate.getEncoding() : null);
}
public void setEncoding(String encoding) {
this.encoding = encoding;
}
public Converter.CircularReferenceBehaviour getCircularReferenceBehaviour() {
return circularReferenceBehaviour != null ? circularReferenceBehaviour : (delegate != null ? delegate.getCircularReferenceBehaviour(): null);
}
public boolean isPrettyPrint() {
return prettyPrint;
}
public void setPrettyPrint(boolean prettyPrint) {
this.prettyPrint = prettyPrint;
}
public List<ObjectMarshaller<C>> getOrderedObjectMarshallers() {
List<ObjectMarshaller<C>> list = new ArrayList<ObjectMarshaller<C>>();
for (Entry entry : objectMarshallers) {
list.add(entry.marshaller);
}
if (delegate != null) {
for (ObjectMarshaller<C> om : delegate.getOrderedObjectMarshallers()) {
list.add(om);
}
}
return list;
}
public void setCircularReferenceBehaviour(Converter.CircularReferenceBehaviour circularReferenceBehaviour) {
this.circularReferenceBehaviour = circularReferenceBehaviour;
}
public DefaultConverterConfiguration() {
proxyHandler = new DefaultProxyHandler();
}
public DefaultConverterConfiguration(ConverterConfiguration<C> delegate) {
this();
this.delegate = delegate;
prettyPrint = delegate.isPrettyPrint();
circularReferenceBehaviour = delegate.getCircularReferenceBehaviour();
encoding = delegate.getEncoding();
}
public DefaultConverterConfiguration(ProxyHandler proxyHandler) {
this.proxyHandler = proxyHandler;
}
public DefaultConverterConfiguration(ConverterConfiguration<C> delegate, ProxyHandler proxyHandler) {
this(proxyHandler);
this.delegate = delegate;
prettyPrint = delegate.isPrettyPrint();
circularReferenceBehaviour = delegate.getCircularReferenceBehaviour();
encoding = delegate.getEncoding();
}
public DefaultConverterConfiguration(List<ObjectMarshaller<C>> oms) {
this();
int initPriority = -1;
for (ObjectMarshaller<C> om : oms) {
registerObjectMarshaller(om, initPriority--);
}
}
public DefaultConverterConfiguration(List<ObjectMarshaller<C>> oms, ProxyHandler proxyHandler) {
this(oms);
this.proxyHandler = proxyHandler;
}
public void registerObjectMarshaller(ObjectMarshaller<C> marshaller) {
registerObjectMarshaller(marshaller, DEFAULT_PRIORITY);
}
public void registerObjectMarshaller(ObjectMarshaller<C> marshaller, int priority) {
objectMarshallers.add(new Entry(marshaller, priority));
}
public void registerObjectMarshaller(Class<?> c, int priority, Closure callable) {
registerObjectMarshaller(new ClosureObjectMarshaller<C>(c, callable), priority);
}
public void registerObjectMarshaller(Class<?> c, Closure callable) {
registerObjectMarshaller(new ClosureObjectMarshaller<C>(c, callable));
}
public ObjectMarshaller<C> getMarshaller(Object o) {
for (Entry entry : objectMarshallers) {
if (entry.marshaller.supports(o)) {
return entry.marshaller;
}
}
return delegate != null ? delegate.getMarshaller(o) : null;
}
public class Entry implements Comparable<Entry> {
protected final ObjectMarshaller<C> marshaller;
private final int priority;
private final int seq;
private Entry(ObjectMarshaller<C> marshaller, int priority) {
this.marshaller = marshaller;
this.priority = priority;
seq = MARSHALLER_SEQUENCE.incrementAndGet();
}
public int compareTo(Entry entry) {
return priority == entry.priority ? entry.seq - seq : entry.priority - priority;
}
}
public ProxyHandler getProxyHandler() {
return proxyHandler;
}
public boolean isCacheObjectMarshallerByClass() {
return cacheObjectMarshallerByClass;
}
public void setCacheObjectMarshallerByClass(boolean cacheObjectMarshallerByClass) {
this.cacheObjectMarshallerByClass = cacheObjectMarshallerByClass;
}
}