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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.
* ====================================================================
*
* 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
* .
*
*/
package org.apache.http.conn;
import java.io.IOException;
import java.io.InputStream;
/**
* A watcher for {@link EofSensorInputStream}. Each stream will notify its
* watcher at most once.
*
* @since 4.0
*/
public interface EofSensorWatcher {
/**
* Indicates that EOF is detected.
*
* @param wrapped the underlying stream which has reached EOF
*
* @return {@code true} if {@code wrapped} should be closed,
* {@code false} if it should be left alone
*
* @throws IOException
* in case of an IO problem, for example if the watcher itself
* closes the underlying stream. The caller will leave the
* wrapped stream alone, as if {@code false} was returned.
*/
boolean eofDetected(InputStream wrapped)
throws IOException;
/**
* Indicates that the {@link EofSensorInputStream stream} is closed.
* This method will be called only if EOF was not detected
* before closing. Otherwise, {@link #eofDetected eofDetected} is called.
*
* @param wrapped the underlying stream which has not reached EOF
*
* @return {@code true} if {@code wrapped} should be closed,
* {@code false} if it should be left alone
*
* @throws IOException
* in case of an IO problem, for example if the watcher itself
* closes the underlying stream. The caller will leave the
* wrapped stream alone, as if {@code false} was returned.
*/
boolean streamClosed(InputStream wrapped)
throws IOException;
/**
* Indicates that the {@link EofSensorInputStream stream} is aborted.
* This method will be called only if EOF was not detected
* before aborting. Otherwise, {@link #eofDetected eofDetected} is called.
*
* This method will also be invoked when an input operation causes an
* IOException to be thrown to make sure the input stream gets shut down.
*
*
* @param wrapped the underlying stream which has not reached EOF
*
* @return {@code true} if {@code wrapped} should be closed,
* {@code false} if it should be left alone
*
* @throws IOException
* in case of an IO problem, for example if the watcher itself
* closes the underlying stream. The caller will leave the
* wrapped stream alone, as if {@code false} was returned.
*/
boolean streamAbort(InputStream wrapped)
throws IOException;
}