org.sonar.server.source.CharactersReader Maven / Gradle / Ivy
/*
* SonarQube
* Copyright (C) 2009-2018 SonarSource SA
* mailto:info AT sonarsource DOT com
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
package org.sonar.server.source;
import java.io.BufferedReader;
import java.io.IOException;
import java.util.ArrayDeque;
import java.util.Deque;
class CharactersReader {
static final int END_OF_STREAM = -1;
private final BufferedReader stringBuffer;
private final Deque openTags;
private int currentValue;
private int previousValue;
private int currentIndex = -1;
public CharactersReader(BufferedReader stringBuffer) {
this.stringBuffer = stringBuffer;
this.openTags = new ArrayDeque<>();
}
boolean readNextChar() throws IOException {
previousValue = currentValue;
currentValue = stringBuffer.read();
currentIndex++;
return currentValue != END_OF_STREAM;
}
int getCurrentValue() {
return currentValue;
}
int getPreviousValue() {
return previousValue;
}
int getCurrentIndex() {
return currentIndex;
}
void registerOpenTag(String textType) {
openTags.push(textType);
}
void removeLastOpenTag() {
openTags.remove();
}
Deque getOpenTags() {
return openTags;
}
}