org.netbeans.lib.profiler.utils.CharStack 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 org.netbeans.lib.profiler.utils;
/**
*
* @author Jaroslav Bachorik
*/
public class CharStack {
//~ Instance fields ----------------------------------------------------------------------------------------------------------
private char[] data;
private float loadFactor;
private int maxCapacity;
private int stackPointer;
//~ Constructors -------------------------------------------------------------------------------------------------------------
/** Creates a new instance of CharStack */
public CharStack() {
maxCapacity = 10;
stackPointer = -1;
loadFactor = 1.75f;
data = new char[maxCapacity];
}
//~ Methods ------------------------------------------------------------------------------------------------------------------
public synchronized boolean isEmpty() {
return stackPointer == -1;
}
public synchronized void clear() {
stackPointer = -1;
}
public synchronized char peek() throws IllegalStateException {
if (isEmpty()) {
throw new IllegalStateException();
}
return data[stackPointer];
}
public synchronized char pop() throws IllegalStateException {
if (isEmpty()) {
throw new IllegalStateException();
}
return data[stackPointer--];
}
public synchronized void push(char chr) {
if (stackPointer >= (maxCapacity - 1)) {
int newCapacity = (int) ((float) maxCapacity * loadFactor);
char[] newData = new char[newCapacity];
System.arraycopy(data, 0, newData, 0, data.length);
data = newData;
maxCapacity = newCapacity;
newData = null;
}
data[++stackPointer] = chr;
}
}
© 2015 - 2025 Weber Informatics LLC | Privacy Policy