com.thoughtworks.xstream.core.DefaultConverterLookup Maven / Gradle / Ivy
/*
* Copyright (C) 2004, 2005, 2006 Joe Walnes.
* Copyright (C) 2006, 2007, 2008, 2009, 2011, 2013, 2016, 2017 XStream Committers.
* All rights reserved.
*
* The software in this package is published under the terms of the BSD
* style license a copy of which has been included with this distribution in
* the LICENSE.txt file.
*
* Created on 07. March 2004 by Joe Walnes
*/
package com.thoughtworks.xstream.core;
import com.thoughtworks.xstream.converters.Converter;
import com.thoughtworks.xstream.converters.ConverterLookup;
import com.thoughtworks.xstream.converters.ConverterRegistry;
import com.thoughtworks.xstream.core.util.Cloneables;
import com.thoughtworks.xstream.core.util.PrioritizedList;
import com.thoughtworks.xstream.mapper.Mapper;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.Map;
/**
* The default implementation of converters lookup.
*
* @author Joe Walnes
* @author Jörg Schaible
* @author Guilherme Silveira
*/
@SuppressWarnings({"rawtypes", "unchecked"})
public class DefaultConverterLookup implements ConverterLookup, ConverterRegistry, Caching {
private final PrioritizedList converters = new PrioritizedList();
private transient Map typeToConverterMap;
private Map serializationMap = null;
public DefaultConverterLookup() {
this(new HashMap());
}
/**
* Constructs a DefaultConverterLookup with a provided map.
*
* @param map the map to use
* @throws NullPointerException if map is null
* @since 1.4.11
*/
public DefaultConverterLookup(Map map) {
typeToConverterMap = map;
typeToConverterMap.clear();
}
/**
* @deprecated As of 1.3, use {@link #DefaultConverterLookup()}
*/
public DefaultConverterLookup(Mapper mapper) {
this();
}
public Converter lookupConverterForType(Class type) {
Converter cachedConverter = type != null ? (Converter)typeToConverterMap.get(type.getName()) : null;
if (cachedConverter != null) {
return cachedConverter;
}
final Map errors = new LinkedHashMap();
Iterator iterator = converters.iterator();
while (iterator.hasNext()) {
Converter converter = (Converter)iterator.next();
try {
if (converter.canConvert(type)) {
if (type != null) {
typeToConverterMap.put(type.getName(), converter);
}
return converter;
}
} catch (final RuntimeException e) {
errors.put(converter.getClass().getName(), e.getMessage());
} catch (final LinkageError e) {
errors.put(converter.getClass().getName(), e.getMessage());
}
}
final RuntimeException exception = new RuntimeException(errors.isEmpty()
? "No converter specified"
: "No converter available");
// exception.add("type", type.getName());
iterator = errors.entrySet().iterator();
while (iterator.hasNext()) {
iterator.next();
// exception.add("converter", entry.getKey().toString());
// exception.add("message", entry.getValue().toString());
}
throw exception;
}
public void registerConverter(Converter converter, int priority) {
typeToConverterMap.clear();
converters.add(converter, priority);
}
public void flushCache() {
typeToConverterMap.clear();
Iterator iterator = converters.iterator();
while (iterator.hasNext()) {
Converter converter = (Converter)iterator.next();
if (converter instanceof Caching) {
((Caching)converter).flushCache();
}
}
}
private Object writeReplace() {
serializationMap = (Map)Cloneables.cloneIfPossible(typeToConverterMap);
serializationMap.clear();
return this;
}
private Object readResolve() {
typeToConverterMap = serializationMap == null ? new HashMap() : serializationMap;
serializationMap = null;
return this;
}
}