| /* |
| * 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.asterix.external.classad; |
| |
| public class StringLexerSource extends LexerSource { |
| private String aString; |
| private int offset; |
| |
| public StringLexerSource(String aString, int offset) { |
| setNewSource(aString, offset); |
| } |
| |
| public StringLexerSource(String aString) { |
| setNewSource(aString, 0); |
| } |
| |
| @Override |
| public int getPosition() { |
| return offset; |
| } |
| |
| public void setNewSource(String aString, int offset) { |
| this.aString = aString; |
| this.offset = offset; |
| } |
| |
| @Override |
| public char readCharacter() { |
| if (offset == aString.length()) { |
| previousCharacter = Lexer.EOF; |
| return previousCharacter; |
| } else { |
| previousCharacter = aString.charAt(offset); |
| offset++; |
| return previousCharacter; |
| } |
| } |
| |
| @Override |
| public void unreadCharacter() { |
| if (offset > 0) { |
| if (previousCharacter != Lexer.EOF) { |
| offset--; |
| } |
| } |
| } |
| |
| @Override |
| public boolean atEnd() { |
| return offset == aString.length(); |
| } |
| |
| public int getCurrentLocation() { |
| return offset; |
| } |
| |
| public void setNewSource(String buffer) { |
| setNewSource(buffer, 0); |
| } |
| |
| @Override |
| public char[] getBuffer() { |
| return aString.toCharArray(); |
| } |
| |
| } |