org.apache.solr.client.solrj.request.ContentStreamUpdateRequest.java Source code

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Here is the source code for org.apache.solr.client.solrj.request.ContentStreamUpdateRequest.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.solr.client.solrj.request;

import java.io.File;
import java.io.IOException;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

import org.apache.commons.io.IOUtils;
import org.apache.solr.common.util.ContentStream;
import org.apache.solr.common.util.ContentStreamBase;

/**
 * Basic functionality to upload a File or {@link org.apache.solr.common.util.ContentStream} to a Solr Cell or some
 * other handler that takes ContentStreams (CSV)
 * <p>
 * See http://wiki.apache.org/solr/ExtractingRequestHandler<br>
 * See http://wiki.apache.org/solr/UpdateCSV
 * 
 *
 **/
public class ContentStreamUpdateRequest extends AbstractUpdateRequest {
    List<ContentStream> contentStreams;

    /**
     *
     * @param url The URL to send the {@link org.apache.solr.common.util.ContentStream} to in Solr.
     */
    public ContentStreamUpdateRequest(String url) {
        super(METHOD.POST, url);
        contentStreams = new ArrayList<>();
    }

    @Override
    public Collection<ContentStream> getContentStreams() throws IOException {
        return contentStreams;
    }

    @Override
    public RequestWriter.ContentWriter getContentWriter(String expectedType) {
        if (contentStreams == null || contentStreams.isEmpty() || contentStreams.size() > 1)
            return null;
        ContentStream stream = contentStreams.get(0);
        return new RequestWriter.ContentWriter() {
            @Override
            public void write(OutputStream os) throws IOException {
                try (var inStream = stream.getStream()) {
                    IOUtils.copy(inStream, os);
                }
            }

            @Override
            public String getContentType() {
                return stream.getContentType();
            }
        };
    }

    /**
     * Add a File to the {@link org.apache.solr.common.util.ContentStream}s.
     * @param file The File to add.
     * @throws IOException if there was an error with the file.
     *
     * @see #getContentStreams()
     * @see org.apache.solr.common.util.ContentStreamBase.FileStream
     */
    public void addFile(File file, String contentType) throws IOException {
        ContentStreamBase cs = new ContentStreamBase.FileStream(file);
        cs.setContentType(contentType);
        addContentStream(cs);
    }

    /**
     * Add a {@link org.apache.solr.common.util.ContentStream} to {@link #getContentStreams()}
     * @param contentStream The {@link org.apache.solr.common.util.ContentStream}
     */
    public void addContentStream(ContentStream contentStream) {
        contentStreams.add(contentStream);
    }

}