trunk/xbean-reflect/src/main/java/org/apache/xbean/propertyeditor/AbstractCollectionConverter.java

/**
 *
 * Copyright 2005-2006 The Apache Software Foundation or its licensors, as applicable.
 *
 *  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.apache.xbean.propertyeditor;

import java.beans.PropertyEditor;
import java.util.Collection;
import java.util.List;
import java.util.ArrayList;
import java.lang.reflect.Array;

/**
 * @version $Rev: 6687 $ $Date: 2005-12-28T21:08:56.733437Z $
 */
public abstract class AbstractCollectionConverter extends AbstractConverter {
    private final PropertyEditor editor;

    public AbstractCollectionConverter(Class type) {
        super(type);
        this.editor = new StringEditor();
    }

    public AbstractCollectionConverter(Class type, PropertyEditor editor) {
        super(type);

        if (editor == null) throw new NullPointerException("editor is null");
        this.editor = editor;
    }

    protected final Object toObjectImpl(String text) {
        List list = CollectionUtil.toList(text, editor);
        if (list == null) {
            return null;
        }
        Object collection = createCollection(list);
        return collection;
    }

    protected abstract Object createCollection(List list);

    protected final String toStringImpl(Object value) {
        Collection values;
        if (value.getClass().isArray()) {
            values = new ArrayList(Array.getLength(value));
            for (int i = 0; i < Array.getLength(value); i++) {
                values.add(Array.get(value, i));
            }
        } else {
            values = (Collection) value;
        }

        String text = CollectionUtil.toString(values, editor);
        return text;
    }
}