com.impetus.kundera.property.accessor.ObjectAccessor.java Source code

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Here is the source code for com.impetus.kundera.property.accessor.ObjectAccessor.java

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/*******************************************************************************
 * * Copyright 2012 Impetus Infotech.
 *  *
 *  * 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 com.impetus.kundera.property.accessor;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import com.impetus.kundera.property.PropertyAccessException;
import com.impetus.kundera.property.PropertyAccessor;

/**
 * The Class ObjectAccessor.
 * 
 * @author animesh.kumar
 */
public class ObjectAccessor implements PropertyAccessor<Object> {

    public static Log log = LogFactory.getLog(ObjectAccessor.class);

    /* @see com.impetus.kundera.property.PropertyAccessor#fromBytes(byte[]) */
    /*
     * (non-Javadoc)
     * 
     * @see com.impetus.kundera.property.PropertyAccessor#fromBytes(byte[])
     */
    @Override
    public final Object fromBytes(Class targetClass, byte[] bytes) {
        try {
            if (targetClass != null && targetClass.equals(byte[].class)) {
                return bytes;
            }
            ObjectInputStream ois;
            ois = new ObjectInputStream(new ByteArrayInputStream(bytes));
            Object o = ois.readObject();
            ois.close();
            return o;
        } catch (IOException e) {
            throw new PropertyAccessException(e);
        } catch (ClassNotFoundException e) {
            throw new PropertyAccessException(e);
        }

    }

    /*
     * @see
     * com.impetus.kundera.property.PropertyAccessor#toBytes(java.lang.Object)
     */
    /*
     * (non-Javadoc)
     * 
     * @see
     * com.impetus.kundera.property.PropertyAccessor#toBytes(java.lang.Object)
     */
    @Override
    public final byte[] toBytes(Object o) {

        try {
            if (o != null) {
                if (o instanceof byte[]) {
                    return (byte[]) o;
                }

                ByteArrayOutputStream baos = new ByteArrayOutputStream();
                ObjectOutputStream oos = new ObjectOutputStream(baos);
                oos.writeObject(o);
                oos.close();
                return baos.toByteArray();
            }
        } catch (IOException e) {
            throw new PropertyAccessException(e);
        }
        return null;
    }

    /*
     * (non-Javadoc)
     * 
     * @see
     * com.impetus.kundera.property.PropertyAccessor#toString(java.lang.Object)
     */
    @Override
    public final String toString(Object object) {
        return object.toString();
    }

    /*
     * (non-Javadoc)
     * 
     * @see
     * com.impetus.kundera.property.PropertyAccessor#fromString(java.lang.String
     * )
     */
    @Override
    public Object fromString(Class targetClass, String s) {
        try {
            Object o = (Object) s;
            return o;
        } catch (NumberFormatException e) {
            throw new PropertyAccessException(e);
        }
    }

    public Object getInstance(Class<?> clazz) {
        Object o = null;
        try {
            o = clazz.newInstance();
            return o;
        } catch (InstantiationException ie) {
            log.warn("Instantiation exception,caused by :" + ie.getMessage());
            return null;
        } catch (IllegalAccessException iae) {
            log.warn("Illegal access exception,caused by :" + iae.getMessage());
            return null;
        }
    }
}