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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.
*
*/
package org.apache.tools.ant.taskdefs;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.Task;
/**
* Parses output from jikes and
* passes errors and warnings
* into the right logging channels of Project.
*
* <p><strong>As of Ant 1.2, this class is considered to be dead code
* by the Ant developers and is unmaintained. Don't use
* it.</strong></p>
*
* @deprecated since 1.2.
* Use Jikes' exit value to detect compilation failure.
*/
public class JikesOutputParser implements ExecuteStreamHandler {
// CheckStyle:VisibilityModifier OFF - bc
protected Task task;
protected boolean errorFlag = false; // no errors so far
protected int errors;
protected int warnings;
protected boolean error = false;
protected boolean emacsMode;
protected BufferedReader br;
// CheckStyle:VisibilityModifier ON
/**
* Ignore.
* @param os ignored
*/
public void setProcessInputStream(OutputStream os) {
}
/**
* Ignore.
* @param is ignored
*/
public void setProcessErrorStream(InputStream is) {
}
/**
* Set the inputstream
* @param is the input stream
* @throws IOException on error
*/
public void setProcessOutputStream(InputStream is) throws IOException {
br = new BufferedReader(new InputStreamReader(is));
}
/**
* Invokes parseOutput.
* @throws IOException on error
*/
public void start() throws IOException {
parseOutput(br);
}
/**
* Ignore.
*/
public void stop() {
}
/**
* Construct a new Parser object
* @param task task in which context we are called
* @param emacsMode if true output in emacs mode
*/
protected JikesOutputParser(Task task, boolean emacsMode) {
super();
System.err.println("As of Ant 1.2 released in October 2000, the "
+ "JikesOutputParser class");
System.err.println("is considered to be dead code by the Ant "
+ "developers and is unmaintained.");
System.err.println("Don\'t use it!");
this.task = task;
this.emacsMode = emacsMode;
}
/**
* Parse the output of a jikes compiler
* @param reader - Reader used to read jikes's output
* @throws IOException on error
*/
protected void parseOutput(BufferedReader reader) throws IOException {
if (emacsMode) {
parseEmacsOutput(reader);
} else {
parseStandardOutput(reader);
}
}
private void parseStandardOutput(BufferedReader reader) throws IOException {
String line;
String lower;
// We assume, that every output, jikes does, stands for an error/warning
// TODO
// Is this correct?
// TODO:
// A warning line, that shows code, which contains a variable
// error will cause some trouble. The parser should definitely
// be much better.
while ((line = reader.readLine()) != null) {
lower = line.toLowerCase();
if (line.trim().equals("")) {
continue;
}
if (lower.indexOf("error") != -1) {
setError(true);
} else if (lower.indexOf("warning") != -1) {
setError(false);
} else {
// If we don't know the type of the line
// and we are in emacs mode, it will be
// an error, because in this mode, jikes won't
// always print "error", but sometimes other
// keywords like "Syntax". We should look for
// all those keywords.
if (emacsMode) {
setError(true);
}
}
log(line);
}
}
private void parseEmacsOutput(BufferedReader reader) throws IOException {
// This may change, if we add advanced parsing capabilities.
parseStandardOutput(reader);
}
private void setError(boolean err) {
error = err;
if (error) {
errorFlag = true;
}
}
private void log(String line) {
if (!emacsMode) {
task.log("", (error ? Project.MSG_ERR : Project.MSG_WARN));
}
task.log(line, (error ? Project.MSG_ERR : Project.MSG_WARN));
}
/**
* Indicate if there were errors during the compile
* @return if errors occurred
*/
protected boolean getErrorFlag() {
return errorFlag;
}
}
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