/*
* Copyright 2002-2005 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.sf.sojo.core;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
/**
* Handle all registered Conversion. All Conversion are added to a List.
* The order of call the add-method is the order to find the right Conversion.
*
* @author linke
*
*/
public final class ConversionHandler {
private final List conversions = new ArrayList();
public void addConversion(final Conversion pvConversion) {
if (pvConversion == null) {
throw new IllegalArgumentException("The Conversion must be different from null");
}
if (containsConversion(pvConversion) == false) {
conversions.add(pvConversion);
}
}
public Conversion replaceConversion(final Conversion pvConversion) {
return replaceConversion(pvConversion, false);
}
public Conversion replaceAllConversion(final Conversion pvConversion) {
return replaceConversion(pvConversion, true);
}
protected Conversion replaceConversion(final Conversion pvConversion, boolean pvReplaceAll) {
Conversion lvConversion = null;
for (int i=0; i<conversions.size(); i++) {
lvConversion = (Conversion) conversions.get(i);
if (lvConversion.getClass().equals(pvConversion.getClass())) {
conversions.set(i, pvConversion);
if (pvReplaceAll == false) {
break;
}
}
}
return lvConversion;
}
public Conversion getConversion(final Object pvObject, final Class pvToType) {
for (final Iterator it = conversions.iterator(); it.hasNext();) {
final Conversion lvConversion = (Conversion) it.next();
if (pvToType == null) {
if (lvConversion.isAssignableFrom(pvObject)) {
return lvConversion;
}
} else {
if (lvConversion.isAssignableTo(pvToType) && lvConversion.isAssignableFrom(pvObject)) {
return lvConversion;
}
}
}
return null;
}
public Conversion getConversionByPosition(final int pvPosition) {
return (Conversion) conversions.get(pvPosition);
}
public int size() { return conversions.size(); }
public void clear() { conversions.clear(); }
public Conversion removeConversion(final Conversion pvConversion) {
Conversion lvReturnConversion = null;
Conversion lvConversion = null;
for (int i=0; i<conversions.size(); i++) {
lvConversion = (Conversion) conversions.get(i);
if (lvConversion.equals(pvConversion)) {
lvReturnConversion = lvConversion;
conversions.remove(i);
}
}
return lvReturnConversion;
}
public boolean containsConversion(Conversion pvConversion) {
boolean lvContaiins = false;
Conversion lvConversion = null;
for (int i=0; i<conversions.size(); i++) {
lvConversion = (Conversion) conversions.get(i);
if (lvConversion.equals(pvConversion)) {
lvContaiins = true;
break;
}
}
return lvContaiins;
}
}
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