port UpdateJsConstants to make Go constants
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Andy Janata
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/**
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* Copyright (c) 2012-2018, Andy Janata
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification, are permitted
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* provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice, this list of conditions
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* and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright notice, this list of
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* conditions and the following disclaimer in the documentation and/or other materials provided
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* with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
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* WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package net.socialgamer.cah;
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import java.io.File;
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import java.io.PrintWriter;
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import java.lang.reflect.Field;
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import java.util.HashMap;
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import java.util.Map;
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import net.socialgamer.cah.Constants.DoubleLocalizable;
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import net.socialgamer.cah.Constants.Localizable;
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/**
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* Analyze the server enums using reflection and create a Go version for the IRC bridge to use.
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*
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* @author Andy Janata (ajanata@socialgamer.net)
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*/
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public class UpdateGoConstants {
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private static final String enumHeaderFmt =
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"type %s string\r\nconst (\r\n";
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private static final String enumValueFmt = "\t%s_%s %s = \"%s\"\r\n";
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private static final String enumTailFmt = ")\r\n";
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private static final String msgHeaderFmt = "var %sMsgs = map[string]string{\r\n";
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private static final String msgValueFmt = "\t \"%s\": \"%s\",\r\n";
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private static final String msgTailFmt = "}\r\n";
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private static final String msg2HeaderFmt = "var %sMsgs2 = map[string]string{\r\n";
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private static final String msg2ValueFmt = "\t \"%s\": \"%s\",\r\n";
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private static final String msg2TailFmt = "}\r\n";
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/**
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* Run the enum updater. The working directory for this program should be the project's root.
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*
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* @param args
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*/
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@SuppressWarnings("rawtypes")
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public static void main(final String[] args) throws Exception {
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final String dir = "";
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final File outFile = new File(dir + "constants.go");
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assert outFile.canWrite();
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assert outFile.delete();
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assert outFile.createNewFile();
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final PrintWriter writer = new PrintWriter(outFile);
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writer.println("// This file is automatically generated. Do not edit.");
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writer.println();
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writer.println("package pyx");
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writer.println();
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writer.println("import ()");
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writer.println();
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final Class[] classes = Constants.class.getClasses();
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for (final Class<?> c : classes) {
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// We only care about enums.
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if (!c.isEnum()) {
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continue;
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}
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// We need to know the name of the enum itself, not that it's Constants$Foo.
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final String cName = c.getName().split("\\$")[1];
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System.out.println(cName);
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writer.format(enumHeaderFmt, cName);
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final Map<String, String> values = getEnumValues(c);
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for (final String key : values.keySet()) {
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final String value = values.get(key);
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writer.format(enumValueFmt, cName, key, cName, value);
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}
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writer.println(enumTailFmt);
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if (Localizable.class.isAssignableFrom(c) || DoubleLocalizable.class.isAssignableFrom(c)) {
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System.out.println(cName + "_msg");
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writer.format(msgHeaderFmt, cName);
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final Map<String, String> messages = getEnumMessageValues(c);
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for (final String key : messages.keySet()) {
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final String value = messages.get(key);
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writer.format(msgValueFmt, key, value);
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}
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writer.println(msgTailFmt);
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}
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if (DoubleLocalizable.class.isAssignableFrom(c)) {
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System.out.println(cName + "_msg_2");
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writer.format(msg2HeaderFmt, cName);
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final Map<String, String> messages = getEnumMessage2Values(c);
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for (final String key : messages.keySet()) {
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final String value = messages.get(key);
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writer.format(msg2ValueFmt, key, value);
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}
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writer.println(msg2TailFmt);
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}
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writer.println();
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}
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writer.flush();
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writer.close();
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}
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/**
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* Return a map of enum values in an Enum class, with the enum field names as keys and the values
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* of toString() as the values.
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*
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* @param enumClass
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* The Enum to examine.
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* @return Map of field name -> toString values.
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* @throws IllegalArgumentException
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* Thrown if {@code enumClass} isn't actually an enum.
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* @throws IllegalAccessException
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* If the value was unable to be retrieved.
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*/
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private static Map<String, String> getEnumValues(final Class<?> enumClass)
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throws IllegalArgumentException, IllegalAccessException {
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if (!enumClass.isEnum()) {
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throw new IllegalArgumentException(enumClass.getName() + " is not an enum");
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}
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final Field[] flds = enumClass.getDeclaredFields();
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final HashMap<String, String> enumMap = new HashMap<String, String>();
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for (final Field f : flds) {
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if (f.isEnumConstant()) {
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enumMap.put(f.getName(), f.get(null).toString());
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}
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}
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return enumMap;
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}
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/**
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* Return a map of {@code Localizable} message values in an Enum class, with the enum field names
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* as keys and the values of getString() as the values.
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*
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* @param enumClass
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* The Enum to examine.
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* @return Map of field name -> getString values.
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* @throws IllegalArgumentException
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* Thrown if {@code enumClass} isn't actually an enum.
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* @throws IllegalAccessException
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* If the value was unable to be retrieved.
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*/
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private static Map<String, String> getEnumMessageValues(final Class<?> enumClass)
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throws IllegalArgumentException, IllegalAccessException {
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if (!enumClass.isEnum()) {
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throw new IllegalArgumentException(enumClass.getName() + " is not an enum");
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} else if (!Localizable.class.isAssignableFrom(enumClass)
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&& !DoubleLocalizable.class.isAssignableFrom(enumClass)) {
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throw new IllegalArgumentException(enumClass.getName()
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+ " does not implement Localizable or DoubleLocalizable.");
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}
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final Field[] flds = enumClass.getDeclaredFields();
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final HashMap<String, String> messageMap = new HashMap<String, String>();
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for (final Field f : flds) {
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if (f.isEnumConstant()) {
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if (Localizable.class.isAssignableFrom(enumClass)) {
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messageMap.put(f.get(null).toString(), ((Localizable) f.get(null)).getString());
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} else {
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messageMap.put(f.get(null).toString(), ((DoubleLocalizable) f.get(null)).getString());
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}
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}
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}
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return messageMap;
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}
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/**
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* Return a map of {@code DoubleLocalizable} message values in an Enum class, with the enum field
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* names as keys and the values of getString2() as the values.
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*
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* @param enumClass
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* The Enum to examine.
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* @return Map of field name -> getString2 values.
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* @throws IllegalArgumentException
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* Thrown if {@code enumClass} isn't actually an enum.
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* @throws IllegalAccessException
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* If the value was unable to be retrieved.
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*/
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private static Map<String, String> getEnumMessage2Values(final Class<?> enumClass)
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throws IllegalArgumentException, IllegalAccessException {
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if (!enumClass.isEnum()) {
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throw new IllegalArgumentException(enumClass.getName() + " is not an enum");
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} else if (!DoubleLocalizable.class.isAssignableFrom(enumClass)) {
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throw new IllegalArgumentException(enumClass.getName()
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+ " does not implement DoubleLocalizable.");
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}
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final Field[] flds = enumClass.getDeclaredFields();
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final HashMap<String, String> messageMap = new HashMap<String, String>();
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for (final Field f : flds) {
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if (f.isEnumConstant()) {
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messageMap.put(f.get(null).toString(), ((DoubleLocalizable) f.get(null)).getString2());
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}
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}
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return messageMap;
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}
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}
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