/*
 * Copyright 2001-2004 The Apache Software Foundation.
 * 
 * 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.axis.encoding.ser;

import org.apache.axis.utils.BeanUtils;
import org.apache.axis.utils.BeanPropertyDescriptor;
import org.apache.axis.utils.JavaUtils;

import javax.xml.namespace.QName;
import javax.xml.rpc.JAXRPCException;
import java.lang.reflect.Constructor;
import java.io.IOException;

/**
 * A deserializer for any simple type with a (String) constructor.  Note:
 * this class is designed so that subclasses need only override the makeValue 
 * method in order to construct objects of their own type.
 *
 * @author Glen Daniels (gdaniels@apache.org)
 * @author Sam Ruby (rubys@us.ibm.com)
 * Modified for JAX-RPC @author Rich Scheuerle (scheu@us.ibm.com)
 */
public class SimpleDeserializerFactory extends BaseDeserializerFactory {

    private static final Class[] STRING_STRING_CLASS = 
        new Class [] {String.class, String.class};
    
    private static final Class[] STRING_CLASS = 
        new Class [] {String.class};

    private transient Constructor constructor = null;
    private boolean isBasicType = false;
    /**
     * Note that the factory is constructed with the QName and xmlType.  This is important
     * to allow distinction between primitive values and java.lang wrappers.
     **/
    public SimpleDeserializerFactory(Class javaType, QName xmlType) {
        super(SimpleDeserializer.class, xmlType, javaType);
        this.isBasicType = JavaUtils.isBasic(javaType);
        initConstructor(javaType);
    }

    private void initConstructor(Class javaType) {
        if (!this.isBasicType) {
            // discover the constructor for non basic types
            try {
                if (QName.class.isAssignableFrom(javaType)) {
                    constructor =
                        javaType.getDeclaredConstructor(STRING_STRING_CLASS);
                } else {
                    constructor =
                        javaType.getDeclaredConstructor(STRING_CLASS);
                }
            } catch (NoSuchMethodException e) {
                try {
                    constructor =
                        javaType.getDeclaredConstructor(new Class[]{});
                    BeanPropertyDescriptor[] pds = BeanUtils.getPd(javaType);
                    if(pds != null) {
                        if(BeanUtils.getSpecificPD(pds,"_value")!=null){
                            return;
                        }
                    }
                    throw new IllegalArgumentException(e.toString());
                } catch (NoSuchMethodException ex) {
                    throw new IllegalArgumentException(ex.toString());
                }
            }
        }
    }

    /**
     * Get the Deserializer and the set the Constructor so the
     * deserializer does not have to do introspection.
     */
    public javax.xml.rpc.encoding.Deserializer getDeserializerAs(String mechanismType)
        throws JAXRPCException {
        if (javaType == java.lang.Object.class) {
            return null;
        }
        if (this.isBasicType) {
            return new SimpleDeserializer(javaType, xmlType);
        } else {
            // XXX: don't think we can always expect to be SimpleDeserializer
            // since getSpecialized() might return a different type
            SimpleDeserializer deser = 
                (SimpleDeserializer) super.getDeserializerAs(mechanismType);
            if (deser != null) {
                deser.setConstructor(constructor);
            }
            return deser;
        }
    }

    private void readObject(java.io.ObjectInputStream in) throws IOException, ClassNotFoundException {
        in.defaultReadObject();
        initConstructor(javaType);
    }

}