/*
* 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.ignite.tools.ant.beautifier;
/**
* Character-based lexical token reader.
*/
class GridJavadocCharArrayLexReader {
/** End Of File (EOF) constant. */
public static final char EOF = (char)-1;
/** Character-based buffer. */
private char[] chars;
/** Index in {@link #chars}. */
private int index;
/**
* Creates reader with given buffer.
*
* @param chars Input character buffer.
*/
GridJavadocCharArrayLexReader(char[] chars) {
this.chars = chars;
}
/**
* Gets length of the buffer.
*
* @return Length if the buffer.
*/
int getLength() {
return chars.length;
}
/**
* Reads next character.
*
* @return Next character from the buffer.
*/
int read() {
return index == chars.length ? EOF : chars[index++];
}
/**
* Peeks at the next character in the buffer.
*
* @return Next character that will be returned by next {@link #read()} apply.
*/
int peek() {
return index == chars.length ? EOF : chars[index];
}
/**
* Skips next character in the buffer.
*/
void skip() {
if (index < chars.length)
index++;
}
/**
* Puts back last read character.
*/
void back() {
if (index > 0)
index--;
}
/**
* Tests whether buffer has more characters.
*
* @return {@code true} if buffer has at least one more character - {@code false} otherwise.
*/
boolean hasMore() {
return index < chars.length;
}
}