org.apache.tools.ant.taskdefs.optional.i18n.Translate Maven / Gradle / Ivy
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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.optional.i18n;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.util.Hashtable;
import java.util.Locale;
import java.util.Vector;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.DirectoryScanner;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.taskdefs.MatchingTask;
import org.apache.tools.ant.types.FileSet;
import org.apache.tools.ant.util.FileUtils;
import org.apache.tools.ant.util.LineTokenizer;
/**
* Translates text embedded in files using Resource Bundle files.
* Since ant 1.6 preserves line endings
*
*/
public class Translate extends MatchingTask {
/**
* search a bundle matching the specified language, the country and the variant
*/
private static final int BUNDLE_SPECIFIED_LANGUAGE_COUNTRY_VARIANT = 0;
/**
* search a bundle matching the specified language, and the country
*/
private static final int BUNDLE_SPECIFIED_LANGUAGE_COUNTRY = 1;
/**
* search a bundle matching the specified language only
*/
private static final int BUNDLE_SPECIFIED_LANGUAGE = 2;
/**
* search a bundle matching nothing special
*/
private static final int BUNDLE_NOMATCH = 3;
/**
* search a bundle matching the language, the country and the variant
* of the current locale of the computer
*/
private static final int BUNDLE_DEFAULT_LANGUAGE_COUNTRY_VARIANT = 4;
/**
* search a bundle matching the language, and the country
* of the current locale of the computer
*/
private static final int BUNDLE_DEFAULT_LANGUAGE_COUNTRY = 5;
/**
* search a bundle matching the language only
* of the current locale of the computer
*/
private static final int BUNDLE_DEFAULT_LANGUAGE = 6;
/**
* number of possibilities for the search
*/
private static final int BUNDLE_MAX_ALTERNATIVES = BUNDLE_DEFAULT_LANGUAGE + 1;
/**
* Family name of resource bundle
*/
private String bundle;
/**
* Locale specific language of the resource bundle
*/
private String bundleLanguage;
/**
* Locale specific country of the resource bundle
*/
private String bundleCountry;
/**
* Locale specific variant of the resource bundle
*/
private String bundleVariant;
/**
* Destination directory
*/
private File toDir;
/**
* Source file encoding scheme
*/
private String srcEncoding;
/**
* Destination file encoding scheme
*/
private String destEncoding;
/**
* Resource Bundle file encoding scheme, defaults to srcEncoding
*/
private String bundleEncoding;
/**
* Starting token to identify keys
*/
private String startToken;
/**
* Ending token to identify keys
*/
private String endToken;
/**
* Whether or not to create a new destination file.
* Defaults to false.
*/
private boolean forceOverwrite;
/**
* Vector to hold source file sets.
*/
private Vector filesets = new Vector();
/**
* Holds key value pairs loaded from resource bundle file
*/
private Hashtable resourceMap = new Hashtable();
/**
* Used to resolve file names.
*/
private static final FileUtils FILE_UTILS = FileUtils.getFileUtils();
/**
* Last Modified Timestamp of resource bundle file being used.
*/
private long[] bundleLastModified = new long[BUNDLE_MAX_ALTERNATIVES];
/**
* Last Modified Timestamp of source file being used.
*/
private long srcLastModified;
/**
* Last Modified Timestamp of destination file being used.
*/
private long destLastModified;
/**
* Has at least one file from the bundle been loaded?
*/
private boolean loaded = false;
/**
* Sets Family name of resource bundle; required.
* @param bundle family name of resource bundle
*/
public void setBundle(String bundle) {
this.bundle = bundle;
}
/**
* Sets locale specific language of resource bundle; optional.
* @param bundleLanguage langage of the bundle
*/
public void setBundleLanguage(String bundleLanguage) {
this.bundleLanguage = bundleLanguage;
}
/**
* Sets locale specific country of resource bundle; optional.
* @param bundleCountry country of the bundle
*/
public void setBundleCountry(String bundleCountry) {
this.bundleCountry = bundleCountry;
}
/**
* Sets locale specific variant of resource bundle; optional.
* @param bundleVariant locale variant of resource bundle
*/
public void setBundleVariant(String bundleVariant) {
this.bundleVariant = bundleVariant;
}
/**
* Sets Destination directory; required.
* @param toDir destination directory
*/
public void setToDir(File toDir) {
this.toDir = toDir;
}
/**
* Sets starting token to identify keys; required.
* @param startToken starting token to identify keys
*/
public void setStartToken(String startToken) {
this.startToken = startToken;
}
/**
* Sets ending token to identify keys; required.
* @param endToken ending token to identify keys
*/
public void setEndToken(String endToken) {
this.endToken = endToken;
}
/**
* Sets source file encoding scheme; optional,
* defaults to encoding of local system.
* @param srcEncoding source file encoding
*/
public void setSrcEncoding(String srcEncoding) {
this.srcEncoding = srcEncoding;
}
/**
* Sets destination file encoding scheme; optional. Defaults to source file
* encoding
* @param destEncoding destination file encoding scheme
*/
public void setDestEncoding(String destEncoding) {
this.destEncoding = destEncoding;
}
/**
* Sets Resource Bundle file encoding scheme; optional. Defaults to source file
* encoding
* @param bundleEncoding bundle file encoding scheme
*/
public void setBundleEncoding(String bundleEncoding) {
this.bundleEncoding = bundleEncoding;
}
/**
* Whether or not to overwrite existing file irrespective of
* whether it is newer than the source file as well as the
* resource bundle file.
* Defaults to false.
* @param forceOverwrite whether or not to overwrite existing files
*/
public void setForceOverwrite(boolean forceOverwrite) {
this.forceOverwrite = forceOverwrite;
}
/**
* Adds a set of files to translate as a nested fileset element.
* @param set the fileset to be added
*/
public void addFileset(FileSet set) {
filesets.addElement(set);
}
/**
* Check attributes values, load resource map and translate
* @throws BuildException if the required attributes are not set
* Required :
* - bundle
* - starttoken
* - endtoken
*
*/
public void execute() throws BuildException {
if (bundle == null) {
throw new BuildException("The bundle attribute must be set.",
getLocation());
}
if (startToken == null) {
throw new BuildException("The starttoken attribute must be set.",
getLocation());
}
if (endToken == null) {
throw new BuildException("The endtoken attribute must be set.",
getLocation());
}
if (bundleLanguage == null) {
Locale l = Locale.getDefault();
bundleLanguage = l.getLanguage();
}
if (bundleCountry == null) {
bundleCountry = Locale.getDefault().getCountry();
}
if (bundleVariant == null) {
Locale l = new Locale(bundleLanguage, bundleCountry);
bundleVariant = l.getVariant();
}
if (toDir == null) {
throw new BuildException("The todir attribute must be set.",
getLocation());
}
if (!toDir.exists()) {
toDir.mkdirs();
} else if (toDir.isFile()) {
throw new BuildException(toDir + " is not a directory");
}
if (srcEncoding == null) {
srcEncoding = System.getProperty("file.encoding");
}
if (destEncoding == null) {
destEncoding = srcEncoding;
}
if (bundleEncoding == null) {
bundleEncoding = srcEncoding;
}
loadResourceMaps();
translate();
}
/**
* Load resource maps based on resource bundle encoding scheme.
* The resource bundle lookup searches for resource files with various
* suffixes on the basis of (1) the desired locale and (2) the default
* locale (basebundlename), in the following order from lower-level
* (more specific) to parent-level (less specific):
*
* basebundlename + "_" + language1 + "_" + country1 + "_" + variant1
* basebundlename + "_" + language1 + "_" + country1
* basebundlename + "_" + language1
* basebundlename
* basebundlename + "_" + language2 + "_" + country2 + "_" + variant2
* basebundlename + "_" + language2 + "_" + country2
* basebundlename + "_" + language2
*
* To the generated name, a ".properties" string is appeneded and
* once this file is located, it is treated just like a properties file
* but with bundle encoding also considered while loading.
*/
private void loadResourceMaps() throws BuildException {
Locale locale = new Locale(bundleLanguage,
bundleCountry,
bundleVariant);
String language = locale.getLanguage().length() > 0
? "_" + locale.getLanguage() : "";
String country = locale.getCountry().length() > 0
? "_" + locale.getCountry() : "";
String variant = locale.getVariant().length() > 0
? "_" + locale.getVariant() : "";
String bundleFile = bundle + language + country + variant;
processBundle(bundleFile, BUNDLE_SPECIFIED_LANGUAGE_COUNTRY_VARIANT, false);
bundleFile = bundle + language + country;
processBundle(bundleFile, BUNDLE_SPECIFIED_LANGUAGE_COUNTRY, false);
bundleFile = bundle + language;
processBundle(bundleFile, BUNDLE_SPECIFIED_LANGUAGE, false);
bundleFile = bundle;
processBundle(bundleFile, BUNDLE_NOMATCH, false);
//Load default locale bundle files
//using default file encoding scheme.
locale = Locale.getDefault();
language = locale.getLanguage().length() > 0
? "_" + locale.getLanguage() : "";
country = locale.getCountry().length() > 0
? "_" + locale.getCountry() : "";
variant = locale.getVariant().length() > 0
? "_" + locale.getVariant() : "";
bundleEncoding = System.getProperty("file.encoding");
bundleFile = bundle + language + country + variant;
processBundle(bundleFile, BUNDLE_DEFAULT_LANGUAGE_COUNTRY_VARIANT, false);
bundleFile = bundle + language + country;
processBundle(bundleFile, BUNDLE_DEFAULT_LANGUAGE_COUNTRY, false);
bundleFile = bundle + language;
processBundle(bundleFile, BUNDLE_DEFAULT_LANGUAGE, true);
}
/**
* Process each file that makes up this bundle.
*/
private void processBundle(final String bundleFile, final int i,
final boolean checkLoaded) throws BuildException {
final File propsFile = getProject().resolveFile(bundleFile + ".properties");
FileInputStream ins = null;
try {
ins = new FileInputStream(propsFile);
loaded = true;
bundleLastModified[i] = propsFile.lastModified();
log("Using " + propsFile, Project.MSG_DEBUG);
loadResourceMap(ins);
} catch (IOException ioe) {
log(propsFile + " not found.", Project.MSG_DEBUG);
//if all resource files associated with this bundle
//have been scanned for and still not able to
//find a single resrouce file, throw exception
if (!loaded && checkLoaded) {
throw new BuildException(ioe.getMessage(), getLocation());
}
}
}
/**
* Load resourceMap with key value pairs. Values of existing keys
* are not overwritten. Bundle's encoding scheme is used.
*/
private void loadResourceMap(FileInputStream ins) throws BuildException {
try {
BufferedReader in = null;
InputStreamReader isr = new InputStreamReader(ins, bundleEncoding);
in = new BufferedReader(isr);
String line = null;
while ((line = in.readLine()) != null) {
//So long as the line isn't empty and isn't a comment...
if (line.trim().length() > 1 && '#' != line.charAt(0) && '!' != line.charAt(0)) {
//Legal Key-Value separators are :, = and white space.
int sepIndex = line.indexOf('=');
if (-1 == sepIndex) {
sepIndex = line.indexOf(':');
}
if (-1 == sepIndex) {
for (int k = 0; k < line.length(); k++) {
if (Character.isSpaceChar(line.charAt(k))) {
sepIndex = k;
break;
}
}
}
//Only if we do have a key is there going to be a value
if (-1 != sepIndex) {
String key = line.substring(0, sepIndex).trim();
String value = line.substring(sepIndex + 1).trim();
//Handle line continuations, if any
while (value.endsWith("\\")) {
value = value.substring(0, value.length() - 1);
line = in.readLine();
if (line != null) {
value = value + line.trim();
} else {
break;
}
}
if (key.length() > 0) {
//Has key already been loaded into resourceMap?
if (resourceMap.get(key) == null) {
resourceMap.put(key, value);
}
}
}
}
}
if (in != null) {
in.close();
}
} catch (IOException ioe) {
throw new BuildException(ioe.getMessage(), getLocation());
}
}
/**
* Reads source file line by line using the source encoding and
* searches for keys that are sandwiched between the startToken
* and endToken. The values for these keys are looked up from
* the hashtable and substituted. If the hashtable doesn't
* contain the key, they key itself is used as the value.
* Detination files and directories are created as needed.
* The destination file is overwritten only if
* the forceoverwritten attribute is set to true if
* the source file or any associated bundle resource file is
* newer than the destination file.
*/
private void translate() throws BuildException {
int filesProcessed = 0;
final int size = filesets.size();
for (int i = 0; i < size; i++) {
FileSet fs = (FileSet) filesets.elementAt(i);
DirectoryScanner ds = fs.getDirectoryScanner(getProject());
String[] srcFiles = ds.getIncludedFiles();
for (int j = 0; j < srcFiles.length; j++) {
try {
File dest = FILE_UTILS.resolveFile(toDir, srcFiles[j]);
//Make sure parent dirs exist, else, create them.
try {
File destDir = new File(dest.getParent());
if (!destDir.exists()) {
destDir.mkdirs();
}
} catch (Exception e) {
log("Exception occurred while trying to check/create "
+ " parent directory. " + e.getMessage(),
Project.MSG_DEBUG);
}
destLastModified = dest.lastModified();
File src = FILE_UTILS.resolveFile(ds.getBasedir(), srcFiles[j]);
srcLastModified = src.lastModified();
//Check to see if dest file has to be recreated
boolean needsWork = forceOverwrite
|| destLastModified < srcLastModified;
if (!needsWork) {
for (int icounter = 0; icounter < BUNDLE_MAX_ALTERNATIVES; icounter++) {
needsWork = (destLastModified < bundleLastModified[icounter]);
if (needsWork) {
break;
}
}
}
if (needsWork) {
log("Processing " + srcFiles[j],
Project.MSG_DEBUG);
translateOneFile(src, dest);
++filesProcessed;
} else {
log("Skipping " + srcFiles[j]
+ " as destination file is up to date",
Project.MSG_VERBOSE);
}
} catch (IOException ioe) {
throw new BuildException(ioe.getMessage(), getLocation());
}
}
}
log("Translation performed on " + filesProcessed + " file(s).", Project.MSG_DEBUG);
}
private void translateOneFile(File src, File dest) throws IOException {
BufferedWriter out = null;
BufferedReader in = null;
try {
FileOutputStream fos = new FileOutputStream(dest);
out = new BufferedWriter(new OutputStreamWriter(fos, destEncoding));
FileInputStream fis = new FileInputStream(src);
in = new BufferedReader(new InputStreamReader(fis, srcEncoding));
String line;
LineTokenizer lineTokenizer = new LineTokenizer();
lineTokenizer.setIncludeDelims(true);
line = lineTokenizer.getToken(in);
while ((line) != null) {
// 2003-02-21 new replace algorithm by tbee ([email protected])
// because it wasn't able to replace something like "@aaa;@bbb;"
// is there a startToken
// and there is still stuff following the startToken
int startIndex = line.indexOf(startToken);
while (startIndex >= 0
&& (startIndex + startToken.length()) <= line.length()) {
// the new value, this needs to be here
// because it is required to calculate the next position to
// search from at the end of the loop
String replace = null;
// we found a starttoken, is there an endtoken following?
// start at token+tokenlength because start and end
// token may be indentical
int endIndex = line.indexOf(endToken, startIndex
+ startToken.length());
if (endIndex < 0) {
startIndex += 1;
} else {
// grab the token
String token = line.substring(startIndex
+ startToken.length(),
endIndex);
// If there is a white space or = or :, then
// it isn't to be treated as a valid key.
boolean validToken = true;
for (int k = 0; k < token.length() && validToken; k++) {
char c = token.charAt(k);
if (c == ':' || c == '='
|| Character.isSpaceChar(c)) {
validToken = false;
}
}
if (!validToken) {
startIndex += 1;
} else {
// find the replace string
if (resourceMap.containsKey(token)) {
replace = (String) resourceMap.get(token);
} else {
log("Replacement string missing for: " + token,
Project.MSG_VERBOSE);
replace = startToken + token + endToken;
}
// generate the new line
line = line.substring(0, startIndex) + replace
+ line.substring(endIndex + endToken.length());
// set start position for next search
startIndex += replace.length();
}
}
// find next starttoken
startIndex = line.indexOf(startToken, startIndex);
}
out.write(line);
line = lineTokenizer.getToken(in);
}
} finally {
FileUtils.close(in);
FileUtils.close(out);
}
}
}
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