/*
 * 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.tuscany.sca.databinding.saxon;

import java.lang.reflect.Array;

import net.sf.saxon.trans.XPathException;
import net.sf.saxon.value.Value;

import org.apache.tuscany.sca.databinding.PullTransformer;
import org.apache.tuscany.sca.databinding.TransformationContext;
import org.apache.tuscany.sca.databinding.TransformationException;
import org.apache.tuscany.sca.databinding.impl.BaseTransformer;

/**
 * Transforms a Value object to a Java Object and return it in an array.
 * 
 * @version $Rev: 659284 $ $Date: 2008-05-22 14:26:18 -0800 (Thu, 22 May 2008) $
 */
public class Value2JavaArray extends BaseTransformer<Value, Object[]> implements PullTransformer<Value, Object[]> {

    public Value2JavaArray() {
    }

    @Override
    protected Class<Value> getSourceType() {
        return Value.class;
    }

    @Override
    protected Class<Object[]> getTargetType() {
        return Object[].class;
    }

    @Override
    public int getWeight() {
        return super.getWeight() + 100;
    }

    public Object[] transform(Value source, TransformationContext context) {

        try {
            Object object = Value.convert(Value.asItem(source));

            Class<?> componentClass = context.getTargetDataType().getPhysical().getComponentType();
            Object[] result = (Object[])Array.newInstance(componentClass, 1);

            result[0] = object;

            return result;

        } catch (XPathException e) {
            throw new TransformationException(e.getMessage());
        }

    }

}