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/* *******************************************************************
* Copyright (c) 2002 Palo Alto Research Center, Incorporated (PARC).
* All rights reserved.
* This program and the accompanying materials are made available
* under the terms of the Eclipse Public License v 2.0
* which accompanies this distribution and is available at
* https://www.eclipse.org/org/documents/epl-2.0/EPL-2.0.txt
*
* Contributors:
* Xerox/PARC initial implementation
* ******************************************************************/
package org.aspectj.internal.tools.ant.taskdefs;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.Task;
/**
* Check if version source file has the specified build version,
* and ensure a tag file reflects whether it does or not.
*/
public class VersionUptodate extends Task {
public VersionUptodate() {}
private String buildVersion;
private File versionSource;
private File versionTagFile;
/**
* @param buildVersion String expected as Version.text - required
*/
public void setVersion(String buildVersion) {
this.buildVersion = buildVersion;
}
/**
* @param versionSource the File Version.java containing text constant
* - required
*/
public void setVersionSourceFile(File versionSource) {
this.versionSource = versionSource;
}
/**
* @param versionTagFile the File whose existence signals that the version
* is uptodate after this task executes - required.
*/
public void setVersionTagFile(File versionTagFile) {
this.versionTagFile = versionTagFile;
}
/**
* If the Version.java source file contains the correct
* build version, then create the output tag file,
* else delete it if it exists.
* @throws BuildException if tagFile not creatable and version is incorrect
* or if version is correct and tagFile cannot be deleted.
*/
public void execute() throws BuildException {
if (null == buildVersion) {
throw new BuildException("require buildVersion");
}
if ((null == versionSource) || !versionSource.canRead()){
throw new BuildException("require versionSource");
}
if (null == versionTagFile){
throw new BuildException("require versionTagFile");
}
if (sameVersion(versionSource, buildVersion)) {
if (!versionTagFile.exists()) {
createFile(versionTagFile, buildVersion);
}
} else if (null == versionTagFile) {
throw new BuildException("no tag file, and version out of date");
} else if (versionTagFile.exists()) {
if (!versionTagFile.delete()) {
throw new BuildException("version out of date, but cannot delete " + versionTagFile);
}
}
}
/**
* Detect whether version is correct in Java sources.
* @param versionSource
* @param buildVersion
* @return boolean
*/
private boolean sameVersion(File versionSource, String buildVersion) {
// XXX build and load instead of scanning?
FileReader fileReader = null;
try {
fileReader = new FileReader(versionSource);
BufferedReader reader = new BufferedReader(fileReader);
String line;
while (null != (line = reader.readLine())) {
int loc = line.indexOf("static final String text = ");
if (-1 != loc) {
return (-1 != line.indexOf(buildVersion , loc));
}
}
return false;
} catch (IOException e) {
return false;
} finally {
if (null != fileReader) {
try {
fileReader.close();
} catch (IOException e) {
}
}
}
}
/**
* Create file with contents
*/
private void createFile(File versionTagFile, String contents) {
FileWriter writer = null;
try {
writer = new FileWriter(versionTagFile);
char[] buf = new char[contents.length()];
contents.getChars(0, buf.length, buf, 0);
writer.write(contents);
} catch (IOException e) {
throw new BuildException("writing " + versionTagFile, e);
} finally {
if (null != writer) {
try {
writer.close();
} catch (IOException e){
// ignore
}
}
}
}
}
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