com.codename1.util.regex.StringReader Maven / Gradle / Ivy
/*
* 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 com.codename1.util.regex;
import java.io.Reader;
/**
*
* @author Nikolay Neizvesny
*/
public class StringReader extends Reader {
private static final char NEW_LINE = '\n';
private String str;
private int pointer = 0;
public StringReader(String str) {
this.str = str;
}
public int read() {
if (pointer >= str.length()) {
return -1;
}
return str.charAt(pointer++);
}
public int read(char[] cbuf, int off, int len) {
if (pointer >= str.length()) {
return -1;
}
int read = 0;
int slen = str.length();
for (int i = 0; i < len && pointer < slen; i++, read++) {
cbuf[off + i] = str.charAt(pointer++);
}
return read;
}
public void close() {
}
public String readLine() {
if (pointer >= str.length()) {
return null;
}
int nextLine = str.indexOf(NEW_LINE, pointer);
if (nextLine == -1) {
nextLine = str.length();
}
String result = str.substring(pointer, nextLine);
pointer = nextLine + 1;
return result;
}
public boolean ready() {
return pointer < str.length();
}
}