/*
* Copyright 2010 Google Inc.
*
* Licensed 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 com.google.gwt.tools.cldr;
import com.google.gwt.i18n.shared.GwtLocale;
import org.unicode.cldr.util.CLDRFile.Factory;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
/**
* Base class for CLDR processors that generate GWT i18n resources.
*/
public abstract class Processor {
protected static final String I18N_PACKAGE_PATH = "user/src/com/google/gwt/i18n/";
protected static <T> String join(String joiner, Iterable<T> objects) {
StringBuilder buf = new StringBuilder();
for (Object obj : objects) {
if (buf.length() > 0) {
buf.append(joiner);
}
buf.append(obj.toString());
}
return buf.toString();
}
protected static String localeSuffix(GwtLocale locale) {
return (locale.isDefault() ? "" : "_") + locale.getAsString();
}
/**
* @param value
* @return value with all quotes escaped
*/
protected static String quote(String value) {
return value.replace("\"", "\\\"");
}
protected final Factory cldrFactory;
protected final LocaleData localeData;
protected final File outputDir;
private boolean useOverride;
/**
* Initialize the shared portion of a Processor.
*
* @param outputDir output directory for created files
* @param cldrFactory CLDR factory used to create new CLDRFile instances
* @param localeData LocaleData instance to collect data from CLDR files
*/
protected Processor(File outputDir, Factory cldrFactory, LocaleData localeData) {
this.outputDir = outputDir;
this.cldrFactory = cldrFactory;
this.localeData = localeData;
useOverride = true;
}
/**
* Execute this processor.
*
* It will call loadData, cleanupData, writeOutputFiles, and then reset on its
* localeData instance.
*
* @throws IOException
*/
public final void run() throws IOException {
try {
loadData();
cleanupData();
writeOutputFiles();
} finally {
localeData.reset();
}
}
/**
* Override hook for subclasses to implement any cleanup needed, such as
* removing values which duplicate those from ancestors.
*/
protected void cleanupData() {
// do nothing by default
}
/**
* Create an output file including any parent directories.
*
* @param name name of file, which will be prefixed by
* user/src/com/google/gwt/i18n/client/impl/cldr
* @param ext extension for file
* @param locale locale name or null if not localized
* @return a PrintWriter instance
* @throws IOException
*/
protected PrintWriter createFile(String name, String ext, String locale) throws IOException {
if (locale == null || locale.length() == 0) {
locale = "";
} else {
locale = "_" + locale;
}
return createOutputFile("client/impl/cldr/" + name + locale + "." + ext);
}
protected PrintWriter createOutputFile(String suffix) throws IOException, FileNotFoundException {
return createOutputFile(I18N_PACKAGE_PATH, suffix);
}
protected PrintWriter createOutputFile(String prefix, String suffix) throws IOException,
FileNotFoundException {
PrintWriter pw;
File f = new File(outputDir, prefix + suffix);
File parent = f.getParentFile();
if (parent != null) {
parent.mkdirs();
}
f.createNewFile();
pw =
new PrintWriter(
new BufferedWriter(new OutputStreamWriter(new FileOutputStream(f), "UTF-8")), false);
return pw;
}
protected void generateIntMethod(PrintWriter pw, String category, GwtLocale locale, String key,
String method) {
String value = localeData.getEntry(category, locale, key);
if (value != null) {
pw.println();
if (useOverride) {
pw.println(" @Override");
}
pw.println(" public int " + method + "() {");
pw.println(" return " + value + ";");
pw.println(" }");
}
}
protected void generateStringMethod(PrintWriter pw, String category, GwtLocale locale,
String key, String method) {
String value = localeData.getEntry(category, locale, key);
generateStringValue(pw, method, value);
}
protected void generateStringValue(PrintWriter pw, String method, String value) {
if (value != null) {
pw.println();
if (useOverride) {
pw.println(" @Override");
}
pw.println(" public String " + method + "() {");
pw.println(" return \"" + quote(value) + "\";");
pw.println(" }");
}
}
/**
* @return true if generated methods should use @Override.
*/
protected boolean getOverrides() {
return useOverride;
}
/**
* Load data needed by this processor.
*
* @throws IOException
*/
protected abstract void loadData() throws IOException;
protected void printHeader(PrintWriter pw) {
pw.println("/*");
pw.println(" * Copyright 2010 Google Inc.");
pw.println(" * ");
pw.println(" * Licensed under the Apache License, Version 2.0 (the "
+ "\"License\"); you may not");
pw.println(" * use this file except in compliance with the License. You "
+ "may obtain a copy of");
pw.println(" * the License at");
pw.println(" * ");
pw.println(" * http://www.apache.org/licenses/LICENSE-2.0");
pw.println(" * ");
pw.println(" * Unless required by applicable law or agreed to in writing, " + "software");
pw.println(" * distributed under the License is distributed on an \"AS "
+ "IS\" BASIS, WITHOUT");
pw.println(" * WARRANTIES OR CONDITIONS OF ANY KIND, either express or " + "implied. See the");
pw.println(" * License for the specific language governing permissions and "
+ "limitations under");
pw.println(" * the License.");
pw.println(" */");
}
/**
* Set whether method definitions should use @Override.
*
* @param useOverride
*/
protected void setOverrides(boolean useOverride) {
this.useOverride = useOverride;
}
/**
* Write output files produced by this processor.
*
* @throws IOException
*/
protected abstract void writeOutputFiles() throws IOException;
}