/*
* 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.tools.ant.input;
import java.io.InputStream;
import java.io.ByteArrayOutputStream;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.taskdefs.StreamPumper;
import org.apache.tools.ant.util.FileUtils;
/**
* Prompts on System.err, reads input from System.in until EOF
*
* @since Ant 1.7
*/
public class GreedyInputHandler extends DefaultInputHandler {
private static final int BUFFER_SIZE = 1024;
/**
* Empty no-arg constructor
*/
public GreedyInputHandler() {
}
/**
* Prompts and requests input.
* @param request the request to handle
* @throws BuildException if not possible to read from console,
* or if input is invalid.
*/
public void handleInput(InputRequest request) throws BuildException {
String prompt = getPrompt(request);
InputStream in = null;
try {
in = getInputStream();
System.err.println(prompt);
System.err.flush();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
StreamPumper p = new StreamPumper(in, baos);
Thread t = new Thread(p);
t.start();
try {
t.join();
} catch (InterruptedException e) {
try {
t.join();
} catch (InterruptedException e2) {
// Ignore
}
}
request.setInput(new String(baos.toByteArray()));
if (!(request.isInputValid())) {
throw new BuildException(
"Received invalid console input");
}
if (p.getException() != null) {
throw new BuildException(
"Failed to read input from console", p.getException());
}
} finally {
FileUtils.close(in);
}
}
}