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xbean-reflect provides very flexible ways to create objects and graphs of objects for DI frameworks

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/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.Map;

/**
 * @version $Rev: 6680 $ $Date: 2005-12-24T04:38:27.427468Z $
 */
public abstract class AbstractMapConverter extends AbstractConverter {
    private final PropertyEditor keyEditor;
    private final PropertyEditor valueEditor;

    public AbstractMapConverter(Class type) {
        super(type);
        this.keyEditor = new StringEditor();
        this.valueEditor = new StringEditor();
    }

    protected AbstractMapConverter(Class type, PropertyEditor keyEditor, PropertyEditor valueEditor) {
        super(type);
        this.keyEditor = keyEditor;
        this.valueEditor = valueEditor;
    }

    /**
     * Treats the text value of this property as an input stream that
     * is converted into a Property bundle.
     *
     * @return a Properties object
     * @throws PropertyEditorException An error occurred creating the Properties object.
     */
    protected final Object toObjectImpl(String text) {
        Map map = CollectionUtil.toMap(text, keyEditor, valueEditor);
        if (map == null) {
            return null;
        }
        Map finalMap = createMap(map);
        return finalMap;
    }

    protected abstract Map createMap(Map map);

    protected final String toStringImpl(Object value) {
        Map map = (Map) value;
        String text = CollectionUtil.toString(map, keyEditor, valueEditor);
        return text;
    }
}