/*
* Copyright 2004,2005 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.axis2.transport.jms.iowrappers;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import javax.jms.BytesMessage;
import javax.jms.JMSException;

import org.apache.axiom.ext.activation.SizeAwareDataSource;

/**
 * Data source implementation wrapping a JMS {@link BytesMessage}.
 * <p>
 * Note that two input streams created by the same instance of this
 * class can not be used at the same time.
 */
public class BytesMessageDataSource implements SizeAwareDataSource {
    private final BytesMessage message;
    private final String contentType;

    public BytesMessageDataSource(BytesMessage message, String contentType) {
        this.message = message;
        this.contentType = contentType;
    }
    
    public BytesMessageDataSource(BytesMessage message) {
        this(message, "application/octet-stream");
    }

    public long getSize() {
        try {
            return message.getBodyLength();
        } catch (JMSException ex) {
            throw new RuntimeException(ex);
        }
    }

    public String getContentType() {
        return contentType;
    }

    public InputStream getInputStream() throws IOException {
        try {
            message.reset();
        } catch (JMSException ex) {
            throw new JMSExceptionWrapper(ex);
        }
        return new BytesMessageInputStream(message);
    }

    public String getName() {
        return null;
    }

    public OutputStream getOutputStream() throws IOException {
        throw new UnsupportedOperationException();
    }
}
