| /* |
| * ==================================================================== |
| * 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. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| * |
| */ |
| |
| package org.apache.hc.core5.http.io.entity; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| |
| import org.apache.hc.core5.annotation.Contract; |
| import org.apache.hc.core5.annotation.ThreadingBehavior; |
| import org.apache.hc.core5.http.ContentType; |
| import org.apache.hc.core5.io.IOCallback; |
| import org.apache.hc.core5.util.Args; |
| |
| /** |
| * Entity that delegates the process of content generation to a {@link IOCallback} |
| * with {@link OutputStream} as output sink. |
| * |
| * @since 4.0 |
| */ |
| @Contract(threading = ThreadingBehavior.IMMUTABLE_CONDITIONAL) |
| public final class EntityTemplate extends AbstractHttpEntity { |
| |
| private final long contentLength; |
| private final IOCallback<OutputStream> callback; |
| |
| public EntityTemplate( |
| final long contentLength, final ContentType contentType, final String contentEncoding, |
| final IOCallback<OutputStream> callback) { |
| super(contentType, contentEncoding); |
| this.contentLength = contentLength; |
| this.callback = Args.notNull(callback, "I/O callback"); |
| } |
| |
| @Override |
| public long getContentLength() { |
| return contentLength; |
| } |
| |
| @Override |
| public InputStream getContent() throws IOException { |
| final ByteArrayOutputStream buf = new ByteArrayOutputStream(); |
| writeTo(buf); |
| return new ByteArrayInputStream(buf.toByteArray()); |
| } |
| |
| @Override |
| public boolean isRepeatable() { |
| return true; |
| } |
| |
| @Override |
| public void writeTo(final OutputStream outStream) throws IOException { |
| Args.notNull(outStream, "Output stream"); |
| this.callback.execute(outStream); |
| } |
| |
| @Override |
| public boolean isStreaming() { |
| return false; |
| } |
| |
| @Override |
| public void close() throws IOException { |
| } |
| |
| } |