org.apache.juneau.rest.client.RestRequestEntity.java Source code

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Here is the source code for org.apache.juneau.rest.client.RestRequestEntity.java

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// ***************************************************************************************************************************
// * 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.juneau.rest.client;

import java.io.*;

import org.apache.http.entity.*;
import org.apache.http.message.*;
import org.apache.juneau.internal.*;
import org.apache.juneau.serializer.*;
import org.apache.juneau.utils.*;

/**
 * HttpEntity for serializing POJOs as the body of HTTP requests.
 */
public final class RestRequestEntity extends BasicHttpEntity {
    final Object output;
    final Serializer serializer;
    byte[] outputBytes;

    /**
     * Constructor.
     * @param input The POJO to serialize.  Can also be a {@link Reader} or {@link InputStream}.
     * @param serializer The serializer to use to serialize this response.
     */
    public RestRequestEntity(Object input, Serializer serializer) {
        this.output = input;
        this.serializer = serializer;
        if (serializer != null && serializer.getResponseContentType() != null)
            setContentType(new BasicHeader("Content-Type", serializer.getResponseContentType().toString()));
    }

    @Override /* BasicHttpEntity */
    public void writeTo(OutputStream os) throws IOException {
        if (output instanceof InputStream) {
            IOPipe.create(output, os).closeOut().run();
        } else if (output instanceof Reader) {
            IOPipe.create(output, new OutputStreamWriter(os, IOUtils.UTF8)).closeOut().run();
        } else {
            try {
                if (serializer == null) {
                    // If no serializer specified, just close the stream.
                    os.close();
                } else if (!serializer.isWriterSerializer()) {
                    OutputStreamSerializer s2 = (OutputStreamSerializer) serializer;
                    s2.serialize(output, os);
                    os.flush();
                    os.close();
                } else {
                    Writer w = new OutputStreamWriter(os, IOUtils.UTF8);
                    WriterSerializer s2 = (WriterSerializer) serializer;
                    s2.serialize(output, w);
                    w.flush();
                    w.close();
                }
            } catch (SerializeException e) {
                throw new org.apache.juneau.rest.client.RestCallException(e);
            }
        }
    }

    @Override /* BasicHttpEntity */
    public boolean isRepeatable() {
        return true;
    }

    @Override /* BasicHttpEntity */
    public InputStream getContent() {
        if (outputBytes == null) {
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            try {
                writeTo(baos);
                outputBytes = baos.toByteArray();
            } catch (IOException e) {
                throw new RuntimeException(e);
            }
        }
        return new ByteArrayInputStream(outputBytes);
    }
}