com.google.gwt.i18n.tools.ArgHandlerValueChooser Maven / Gradle / Ivy
/*
* Copyright 2008 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.i18n.tools;
import com.google.gwt.i18n.client.Constants;
import com.google.gwt.i18n.client.ConstantsWithLookup;
import com.google.gwt.i18n.client.Localizable;
import com.google.gwt.i18n.client.Messages;
import com.google.gwt.util.tools.ArgHandler;
import com.google.gwt.util.tools.ArgHandlerFlag;
/**
* This class holds the '-createConstantsWithLookup' and '-createMessages'
* ArgHandler classes. It is shared by both I18NSync and I18NCreator classes.
*
* To use this class, call the getConstantsWithLookupArgHandler()
* and getMessagesArgHandler() methods and add the returned ArgHandler
* instances to a ToolBase registerHandler() method. When parsing the arguments
* is complete, you can retrieve the selected type by calling getArgValue().
*/
class ArgHandlerValueChooser {
private Class argValue = Constants.class;
private ArgHandler cwlArgHandler;
private ArgHandler messagesArgHandler;
/**
* Returns one on "Messages.class", "ConstantsWithLookup.class", or
* "Constants.class" depending on which argument handlers fired.
*
* @return A class literal, returns "Constants.class" by default.
*/
Class getArgValue() {
return argValue;
}
/**
* Creates scripts for a ConstantsWithLookup interface rather than a Constants one.
*
* @return a flag argument handler
*/
ArgHandler getConstantsWithLookupArgHandler() {
if (cwlArgHandler == null) {
cwlArgHandler = new ArgHandlerFlag() {
@Override
public String getPurposeSnippet() {
return "Create scripts for a ConstantsWithLookup interface "
+ "rather than a Constants one.";
}
@Override
public String getLabel() {
return "createConstantsWithLookup";
}
@Override
public boolean setFlag(boolean value) {
if (value && argValue == Messages.class) {
System.err.println("-createMessages cannot be used with -createConstantsWithLookup");
return false;
}
argValue = value ? ConstantsWithLookup.class : Constants.class;
return true;
}
@Override
public boolean getDefaultValue() {
return argValue == ConstantsWithLookup.class;
}
};
}
return cwlArgHandler;
}
/**
* Creates scripts for a Messages interface rather than a Constants one.
*
* @return a flag argument handler
*/
ArgHandler getMessagesArgHandler() {
if (messagesArgHandler == null) {
messagesArgHandler = new ArgHandlerFlag() {
@Override
public String getPurposeSnippet() {
return "Create scripts for a Messages interface rather than a Constants one.";
}
@Override
public String getLabel() {
return "createMessages";
}
@Override
public boolean setFlag(boolean value) {
if (value && argValue == ConstantsWithLookup.class) {
System.err.println("-createMessages cannot be used with -createConstantsWithLookup");
return false;
}
argValue = value ? Messages.class : Constants.class;
return true;
}
@Override
public boolean getDefaultValue() {
return argValue == Messages.class;
}
};
}
return messagesArgHandler;
}
}