/**
* Copyright 2006 Webmedia Group Ltd.
*
* 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.araneaframework.backend.list.helper;
import java.util.HashMap;
import java.util.Map;
import org.araneaframework.backend.list.helper.builder.ValueConverter;
import org.araneaframework.backend.list.memorybased.expression.Value;
import org.araneaframework.uilib.list.util.Converter;
/**
* ValueConverter that has a map of Value names and their <code>Converter</code>
* objects. It also has a global <code>Converter</code> which is used by
* default.
*/
public class ConverterManager implements ValueConverter {
private Converter globalConverter = null;
private Map converters = new HashMap();
public void addGlobalConverter(Converter converter) {
this.globalConverter = converter;
}
public void addConverter(String valueName, Converter converter) {
this.converters.put(valueName, converter);
}
public Object convert(Value value) {
if (this.globalConverter == null && this.converters.size() == 0) {
throw new RuntimeException("No converters provided");
}
String name = value.getName();
if (name != null) {
Converter converter = (Converter) this.converters.get(name);
if (converter != null) {
return converter.convert(value.getValue());
}
}
if (this.globalConverter != null) {
return this.globalConverter.convert(value.getValue());
}
throw new RuntimeException("Either converter for value with name "
+ name + " nor global converter provided");
}
}