org.apache.olingo.ext.proxy.commons.EdmStreamValueHandler.java Source code

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Here is the source code for org.apache.olingo.ext.proxy.commons.EdmStreamValueHandler.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.olingo.ext.proxy.commons;

import java.io.InputStream;
import java.lang.reflect.Method;
import java.net.URI;
import org.apache.commons.io.IOUtils;
import org.apache.olingo.client.api.communication.response.ODataRetrieveResponse;
import org.apache.olingo.ext.proxy.AbstractService;

public class EdmStreamValueHandler extends AbstractInvocationHandler {

    private URI uri;

    private InputStream stream;

    private String contentType;

    protected EdmStreamValueHandler(final URI uri, final AbstractService<?> service) {

        super(service);
        this.uri = uri;
    }

    protected EdmStreamValueHandler(final String contentType, final InputStream stream, final URI uri,
            final AbstractService<?> service) {

        super(service);
        this.contentType = contentType;
        this.stream = stream;
        this.uri = uri;
    }

    @Override
    public Object invoke(final Object proxy, final Method method, final Object[] args) throws Throwable {
        if ("load".equals(method.getName())) {
            load();
            return proxy;
        } else {
            if (isSelfMethod(method)) {
                return invokeSelfMethod(method, args);
            } else {
                throw new NoSuchMethodException(method.getName());
            }
        }
    }

    public void load() {
        if (this.uri != null) {
            final ODataRetrieveResponse<InputStream> res = getClient().getRetrieveRequestFactory()
                    .getMediaRequest(this.uri).execute();
            contentType = res.getContentType();
            stream = res.getBody();
        }
    }

    public String getContentType() {
        return contentType;
    }

    public InputStream getStream() {
        return stream;
    }

    public void close() {
        IOUtils.closeQuietly(stream);
        contentType = null;
        stream = null;
    }
}