| /* |
| * ==================================================================== |
| * 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.nio.entity; |
| |
| import java.io.IOException; |
| import java.io.UnsupportedEncodingException; |
| import java.nio.charset.UnsupportedCharsetException; |
| |
| import org.apache.hc.core5.concurrent.FutureCallback; |
| import org.apache.hc.core5.http.ContentType; |
| import org.apache.hc.core5.http.EntityDetails; |
| import org.apache.hc.core5.http.HttpException; |
| import org.apache.hc.core5.http.config.CharCodingConfig; |
| import org.apache.hc.core5.http.nio.AsyncEntityConsumer; |
| import org.apache.hc.core5.util.Args; |
| |
| /** |
| * Abstract text entity content consumer. |
| * |
| * @since 5.0 |
| * |
| * @param <T> entity representation. |
| */ |
| public abstract class AbstractCharAsyncEntityConsumer<T> extends AbstractCharDataConsumer implements AsyncEntityConsumer<T> { |
| |
| private volatile FutureCallback<T> resultCallback; |
| private volatile T content; |
| |
| protected AbstractCharAsyncEntityConsumer(final int bufSize, final CharCodingConfig charCodingConfig) { |
| super(bufSize, charCodingConfig); |
| } |
| |
| public AbstractCharAsyncEntityConsumer() { |
| } |
| |
| /** |
| * Triggered to signal beginning of entity content stream. |
| * |
| * @param contentType the entity content type |
| */ |
| protected abstract void streamStart(ContentType contentType) throws HttpException, IOException; |
| |
| /** |
| * Triggered to generate entity representation. |
| * |
| * @return the entity content |
| */ |
| protected abstract T generateContent() throws IOException; |
| |
| @Override |
| public final void streamStart( |
| final EntityDetails entityDetails, |
| final FutureCallback<T> resultCallback) throws IOException, HttpException { |
| Args.notNull(resultCallback, "Result callback"); |
| this.resultCallback = resultCallback; |
| try { |
| final ContentType contentType = entityDetails != null ? ContentType.parse(entityDetails.getContentType()) : null; |
| setCharset(contentType != null ? contentType.getCharset() : null); |
| streamStart(contentType); |
| } catch (final UnsupportedCharsetException ex) { |
| throw new UnsupportedEncodingException(ex.getMessage()); |
| } |
| } |
| |
| @Override |
| protected final void completed() throws IOException { |
| content = generateContent(); |
| if (resultCallback != null) { |
| resultCallback.completed(content); |
| } |
| releaseResources(); |
| } |
| |
| @Override |
| public final void failed(final Exception cause) { |
| if (resultCallback != null) { |
| resultCallback.failed(cause); |
| } |
| releaseResources(); |
| } |
| |
| @Override |
| public final T getContent() { |
| return content; |
| } |
| |
| } |