org.dominokit.jackson.stream.impl.JsIntegerStack Maven / Gradle / Ivy
/*
* Copyright © 2019 Dominokit
*
* Licensed 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.dominokit.jackson.stream.impl;
import elemental2.core.JsArray;
import elemental2.core.JsNumber;
import org.dominokit.jackson.stream.Stack;
/**
* A wrapper for an Integer Stack implementation that works in the browser. for the JVM
* implementation please check {@link DefaultIntegerStack}
*/
public class JsIntegerStack implements Stack {
private JsArray stack = new JsArray<>();
private Integer getAt(int index) {
return new Double(get(index).valueOf()).intValue();
}
private JsNumber get(int index) {
JsArray slice = stack.slice();
JsNumber[] jsNumbers = slice.asArray(new JsNumber[slice.length]);
return jsNumbers[index];
}
/** {@inheritDoc} */
@Override
public Integer pop() {
Integer value = getAt(stack.length - 1);
stack.pop();
return value;
}
/** {@inheritDoc} */
@Override
public void push(Integer value) {
stack.push(new JsNumber(value));
}
/** {@inheritDoc} */
@Override
public void replaceTop(Integer newTop) {
stack.pop();
stack.push(new JsNumber(newTop));
}
/** {@inheritDoc} */
@Override
public void insertFirst(Integer value) {
stack.unshift(new JsNumber(value));
}
/** {@inheritDoc} */
@Override
public Integer peek() {
return getAt(stack.length - 1);
}
/** {@inheritDoc} */
@Override
public int size() {
return stack.length;
}
/** {@inheritDoc} */
@Override
public void clear() {
stack = new JsArray<>();
}
}