| /* |
| * 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.codehaus.groovy.tools; |
| |
| import java.util.Arrays; |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| /** |
| * Various utility functions for use in the compiler. |
| */ |
| |
| public abstract class Utilities |
| { |
| private static final Set<String> INVALID_JAVA_IDENTIFIERS = new HashSet<String>(Arrays.asList(( |
| "abstract assert boolean break byte case catch char class const continue default do double else enum " + |
| "extends final finally float for goto if implements import instanceof int interface long native new " + |
| "package private protected public short static strictfp super switch synchronized this throw throws " + |
| "transient try void volatile while true false null").split(" "))); |
| |
| /** |
| * Returns a string made up of repetitions of the specified string. |
| */ |
| |
| public static String repeatString( String pattern, int repeats ) |
| { |
| StringBuilder buffer = new StringBuilder( pattern.length() * repeats ); |
| for( int i = 0; i < repeats; i++ ) |
| { |
| buffer.append( pattern ); |
| } |
| |
| return new String( buffer ); |
| } |
| |
| |
| /** |
| * Returns the end-of-line marker. |
| */ |
| |
| public static String eol() |
| { |
| return eol; |
| } |
| |
| /** |
| * Tells if the given string is a valid Java identifier. |
| */ |
| public static boolean isJavaIdentifier(String name) { |
| if (name.length() == 0 || INVALID_JAVA_IDENTIFIERS.contains(name)) return false; |
| char[] chars = name.toCharArray(); |
| if (!Character.isJavaIdentifierStart(chars[0])) return false; |
| for (int i = 1; i < chars.length; i++ ) { |
| if (!Character.isJavaIdentifierPart(chars[i])) return false; |
| } |
| return true; |
| } |
| |
| private static String eol = System.lineSeparator(); |
| |
| } |