| /* |
| * 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.taskdefs.optional.perforce; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| |
| import org.apache.tools.ant.BuildException; |
| import org.apache.tools.ant.taskdefs.PumpStreamHandler; |
| /** |
| * base class to manage streams around the execution of the Perforce |
| * command line client |
| */ |
| public abstract class P4HandlerAdapter implements P4Handler { |
| // CheckStyle:VisibilityModifier OFF - bc |
| String p4input = ""; |
| private PumpStreamHandler myHandler = null; |
| // CheckStyle:VisibilityModifier ON |
| /** |
| * set any data to be written to P4's stdin |
| * @param p4Input the text to write to P4's stdin |
| */ |
| public void setOutput(String p4Input) { |
| this.p4input = p4Input; |
| } |
| /** |
| * subclasses of P4HandlerAdapter must implement this routine |
| * processing of one line of stdout or of stderr |
| * @param line line of stdout or stderr to process |
| */ |
| public abstract void process(String line); |
| |
| /** |
| * this routine gets called by the execute routine of the Execute class |
| * it connects the PumpStreamHandler to the input/output/error streams of the process. |
| * @throws BuildException if there is a error. |
| * @see org.apache.tools.ant.taskdefs.Execute#execute |
| */ |
| public void start() throws BuildException { |
| if (p4input != null && p4input.length() > 0) { |
| myHandler = new PumpStreamHandler(new P4OutputStream(this), new P4OutputStream(this), |
| new ByteArrayInputStream(p4input.getBytes())); |
| } else { |
| myHandler = new PumpStreamHandler(new P4OutputStream(this), new P4OutputStream(this)); |
| } |
| myHandler.setProcessInputStream(os); |
| myHandler.setProcessErrorStream(es); |
| myHandler.setProcessOutputStream(is); |
| myHandler.start(); |
| } |
| |
| /** |
| * stops the processing of streams |
| * called from P4Base#execP4Command(String command, P4Handler handler) |
| * @see P4Base#execP4Command(String, P4Handler) |
| */ |
| public void stop() { |
| if (myHandler != null) { |
| // might never have been started, forfor example ifif p4 |
| // is not on the PATH |
| myHandler.stop(); |
| } |
| } |
| |
| // CheckStyle:VisibilityModifier OFF - bc |
| OutputStream os; //Input |
| InputStream is; //Output |
| InputStream es; //Error |
| // CheckStyle:VisibilityModifier ON |
| |
| /** |
| * connects the handler to the input stream into Perforce |
| * used indirectly by tasks requiring to send specific standard input |
| * such as p4label, p4change |
| * @param os the stream bringing input to the p4 executable |
| * @throws IOException under unknown circumstances |
| */ |
| public void setProcessInputStream(OutputStream os) throws IOException { |
| this.os = os; |
| } |
| |
| /** |
| * connects the handler to the stderr of the Perforce process |
| * @param is stderr coming from Perforce |
| * @throws IOException under unknown circumstances |
| */ |
| public void setProcessErrorStream(InputStream is) throws IOException { |
| this.es = is; |
| } |
| |
| /** |
| * connects the handler to the stdout of the Perforce process |
| * @param is stdout coming from Perforce |
| * @throws IOException under unknown circumstances |
| */ |
| public void setProcessOutputStream(InputStream is) throws IOException { |
| this.is = is; |
| } |
| } |