CompositeConverter.java

package fr.acxio.tools.agia.convert;

/*
 * Copyright 2014 Acxio
 * 
 * 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.
 */

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

/**
 * Applies the given list of converters to the value.
 * <p>
 * The converters are applied in the given order.</br> If a converter returns
 * more than one value, following converters will be fed with each one.
 * </p>
 * 
 * @author pcollardez
 *
 */
public class CompositeConverter implements FormatConverter {

    private List<FormatConverter> converters;

    public CompositeConverter() {
    }

    public CompositeConverter(List<FormatConverter> sConverters) {
        converters = sConverters;
    }

    public List<FormatConverter> getConverters() {
        return converters;
    }

    public void setConverters(List<FormatConverter> sConverters) {
        converters = sConverters;
    }

    public List<String> convert(String sSource) throws ConversionException {
        List<String> aResult = Collections.singletonList(sSource);
        try {
            if (converters != null) {
                List<String> aTmpResult;
                for (FormatConverter aFormatConverter : converters) {
                    aTmpResult = new ArrayList<String>(1);
                    for (String aValue : aResult) {
                        aTmpResult.addAll(aFormatConverter.convert(aValue));
                    }
                    aResult = aTmpResult;
                }
            }
        } catch (Exception e) {
            throw new ConversionException("Error converting: " + sSource, e);
        }
        return aResult;
    }

}