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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.cxf.helpers;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;
public final class JavaUtils {
/** Use this character as suffix */
static final char KEYWORD_PREFIX = '_';
/**
* These are java keywords as specified at the following URL.
* http://java.sun.com/docs/books/jls/third_edition/html/lexical.html#3.9
* Note that false, true, and null are not strictly keywords; they are
* literal values, but for the purposes of this array, they can be treated
* as literals.
*/
private static final Set KEYWORDS = new HashSet<>(Arrays.asList(
"abstract", "assert", "boolean", "break", "byte", "case", "catch",
"char", "class", "const", "continue", "default", "do", "double",
"else", "enum", "extends", "false", "final", "finally", "float", "for", "goto",
"if", "implements", "import", "instanceof", "int", "interface", "long",
"native", "new", "null", "package", "private", "protected", "public",
"return", "short", "static", "strictfp", "super", "switch",
"synchronized", "this", "throw", "throws", "transient", "true", "try",
"void", "volatile", "while"
));
private static boolean isJava11Compatible;
private static boolean isJava9Compatible;
private static boolean isJava8Before161;
static {
String version = System.getProperty("java.version");
try {
isJava8Before161 = version != null && version.startsWith("1.8.0_")
&& Integer.parseInt(version.substring(6)) < 161;
} catch (NumberFormatException ex) {
isJava8Before161 = false;
}
if (version.indexOf('.') > 0) {
version = version.substring(0, version.indexOf('.'));
}
if (version.indexOf("-") > 0) {
version = version.substring(0, version.indexOf("-"));
}
setJava9Compatible(Integer.valueOf(version) >= 9);
setJava11Compatible(Integer.valueOf(version) >= 11);
}
private JavaUtils() {
}
/**
* checks if the input string is a valid java keyword.
*
* @return boolean true/false
*/
public static boolean isJavaKeyword(String keyword) {
return KEYWORDS.contains(keyword);
}
/**
* Turn a java keyword string into a non-Java keyword string. (Right now
* this simply means appending an underscore.)
*/
public static String makeNonJavaKeyword(String keyword) {
return KEYWORD_PREFIX + keyword;
}
public static boolean isJava9Compatible() {
return isJava9Compatible;
}
public static boolean isJava11Compatible() {
return isJava11Compatible;
}
private static void setJava9Compatible(boolean java9Compatible) {
JavaUtils.isJava9Compatible = java9Compatible;
}
private static void setJava11Compatible(boolean java11Compatible) {
JavaUtils.isJava11Compatible = java11Compatible;
}
public static boolean isJava8Before161() {
return isJava8Before161;
}
}
