com.msopentech.odatajclient.engine.communication.request.cud.ODataValueUpdateRequest.java Source code

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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 com.msopentech.odatajclient.engine.communication.request.cud;

import com.msopentech.odatajclient.engine.client.ODataClient;
import com.msopentech.odatajclient.engine.client.http.HttpClientException;
import com.msopentech.odatajclient.engine.client.http.HttpMethod;
import com.msopentech.odatajclient.engine.communication.response.ODataResponseImpl;
import com.msopentech.odatajclient.engine.communication.request.AbstractODataBasicRequestImpl;
import com.msopentech.odatajclient.engine.communication.request.batch.ODataBatchableRequest;
import com.msopentech.odatajclient.engine.communication.response.ODataValueUpdateResponse;
import com.msopentech.odatajclient.engine.data.ODataPrimitiveValue;
import com.msopentech.odatajclient.engine.data.ODataValue;
import com.msopentech.odatajclient.engine.metadata.edm.EdmSimpleType;
import com.msopentech.odatajclient.engine.format.ODataValueFormat;
import com.msopentech.odatajclient.engine.utils.URIUtils;
import java.io.IOException;
import java.io.InputStream;
import java.net.URI;
import org.apache.commons.io.IOUtils;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpEntityEnclosingRequestBase;

/**
 * This class implements an OData update entity property value request.
 */
public class ODataValueUpdateRequest extends
        AbstractODataBasicRequestImpl<ODataValueUpdateResponse, ODataValueFormat> implements ODataBatchableRequest {

    /**
     * Value to be created.
     */
    private final ODataValue value;

    /**
     * Constructor.
     *
     * @param odataClient client instance getting this request
     * @param method request method.
     * @param targetURI entity set or entity or entity property URI.
     * @param value value to be created.
     */
    ODataValueUpdateRequest(final ODataClient odataClient, final HttpMethod method, final URI targetURI,
            final ODataValue value) {

        super(odataClient, ODataValueFormat.class, method, targetURI);
        // set request body
        this.value = value;
    }

    /**
     * {@inheritDoc }
     */
    @Override
    public ODataValueUpdateResponseImpl execute() {
        final InputStream input = getPayload();
        ((HttpEntityEnclosingRequestBase) request).setEntity(URIUtils.buildInputStreamEntity(odataClient, input));

        try {
            return new ODataValueUpdateResponseImpl(httpClient, doExecute());
        } finally {
            IOUtils.closeQuietly(input);
        }
    }

    /**
     * {@inheritDoc }
     */
    @Override
    protected InputStream getPayload() {
        return IOUtils.toInputStream(value.toString());
    }

    /**
     * Response class about an ODataValueUpdateRequest.
     */
    private class ODataValueUpdateResponseImpl extends ODataResponseImpl implements ODataValueUpdateResponse {

        private ODataValue value = null;

        /**
         * Constructor.
         * <p>
         * Just to create response templates to be initialized from batch.
         */
        private ODataValueUpdateResponseImpl() {
        }

        /**
         * Constructor.
         *
         * @param client HTTP client.
         * @param res HTTP response.
         */
        private ODataValueUpdateResponseImpl(final HttpClient client, final HttpResponse res) {
            super(client, res);
        }

        /**
         * {@inheritDoc }
         */
        @Override
        public ODataValue getBody() {
            if (value == null) {
                final ODataValueFormat format = ODataValueFormat.fromString(getAccept());

                try {
                    value = new ODataPrimitiveValue.Builder(odataClient)
                            .setType(format == ODataValueFormat.TEXT ? EdmSimpleType.String : EdmSimpleType.Stream)
                            .setText(IOUtils.toString(getRawResponse())).build();
                } catch (IOException e) {
                    throw new HttpClientException(e);
                } finally {
                    this.close();
                }
            }
            return value;
        }
    }
}