/*
* 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.isis.applib.util;
import com.google.common.base.Function;
import com.google.common.base.Joiner;
import com.google.common.base.Splitter;
import com.google.common.collect.Iterables;
public final class Enums {
private Enums(){}
public static String getFriendlyNameOf(Enum<?> anEnum) {
return getFriendlyNameOf(anEnum.name());
}
public static String getFriendlyNameOf(String anEnumName) {
return Joiner.on(" ").join(Iterables.transform(Splitter.on("_").split(anEnumName), LOWER_CASE_THEN_CAPITALIZE));
}
public static String getEnumNameFromFriendly(String anEnumFriendlyName) {
return Joiner.on("_").join(Iterables.transform(Splitter.on(" ").split(anEnumFriendlyName), UPPER_CASE));
}
public static String enumToHttpHeader(final Enum<?> anEnum) {
return enumNameToHttpHeader(anEnum.name());
}
public static String enumNameToHttpHeader(final String name) {
final StringBuilder builder = new StringBuilder();
boolean nextUpper = true;
for (final char c : name.toCharArray()) {
if (c == '_') {
nextUpper = true;
builder.append("-");
} else {
builder.append(nextUpper ? c : Character.toLowerCase(c));
nextUpper = false;
}
}
return builder.toString();
}
public static String enumToCamelCase(final Enum<?> anEnum) {
return enumNameToCamelCase(anEnum.name());
}
private static String enumNameToCamelCase(final String name) {
final StringBuilder builder = new StringBuilder();
boolean nextUpper = false;
for (final char c : name.toCharArray()) {
if (c == '_') {
nextUpper = true;
} else {
builder.append(nextUpper ? c : Character.toLowerCase(c));
nextUpper = false;
}
}
return builder.toString();
}
private static Function<String, String> LOWER_CASE_THEN_CAPITALIZE = new Function<String, String>() {
@Override
public String apply(String input) {
return capitalize(input.toLowerCase());
}
};
private static Function<String, String> UPPER_CASE = new Function<String, String>() {
@Override
public String apply(String input) {
return input.toUpperCase();
}
};
private static String capitalize(final String str) {
if (str == null || str.length() == 0) {
return str;
}
if (str.length() == 1) {
return str.toUpperCase();
}
return Character.toUpperCase(str.charAt(0)) + str.substring(1);
}
}