| /* |
| * 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); |
| } |
| } |
| } |