com.nominanuda.web.http.BufferingEntityTemplate.java Source code

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Here is the source code for com.nominanuda.web.http.BufferingEntityTemplate.java

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/*
 * Copyright 2008-2011 the original author or authors.
 * 
 * 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.nominanuda.web.http;

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

import org.apache.http.entity.AbstractHttpEntity;
import org.apache.http.entity.ContentProducer;

public class BufferingEntityTemplate extends AbstractHttpEntity {
    private byte[] content;
    private boolean streaming;
    private ContentProducer contentProducer;

    public BufferingEntityTemplate(ContentProducer cp, boolean _streaming) throws IOException {
        contentProducer = cp;
        streaming = _streaming;
        if (!streaming) {
            produce();
        }
    }

    private void produce() throws IOException {
        ByteArrayOutputStream os = new ByteArrayOutputStream();
        contentProducer.writeTo(os);
        content = os.toByteArray();
    }

    public InputStream getContent() throws IOException, IllegalStateException {
        if (streaming) {
            throw new IllegalStateException("streaming entity does not support getContent()");
        } else {
            return new ByteArrayInputStream(content);
        }
    }

    public long getContentLength() {
        return (streaming) ? -1 : content.length;
    }

    public boolean isRepeatable() {
        return true;
    }

    public boolean isStreaming() {
        return streaming;
    }

    public void writeTo(OutputStream outstream) throws IOException {
        if (streaming) {
            contentProducer.writeTo(outstream);
        } else {
            outstream.write(content);
        }
    }

    @Override
    public void consumeContent() throws IOException, UnsupportedOperationException {
    }

}