net.hasor.dataql.runtime.mem.DataHeap Maven / Gradle / Ivy
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/*
* Copyright 2008-2009 the original author or authors.
*
* 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 net.hasor.dataql.runtime.mem;
/**
* 堆数据
* @author 赵永春 ([email protected])
* @version : 2019-11-22
*/
public class DataHeap implements Cloneable {
private DataHeap parent = null;
private int depth = 0;
private Object[] heapDataPool = new Object[10];
private String[] heapDataNames = new String[10];
public DataHeap() {
this(null);
}
public DataHeap(DataHeap parent) {
if (parent != null) {
this.parent = parent;
this.depth = parent.depth + 1;
}
}
public void defineName(int position, String name) {
if (position >= this.heapDataNames.length) {
String[] newHeapDataPool = new String[heapDataNames.length + 5];
System.arraycopy(this.heapDataNames, 0, newHeapDataPool, 0, heapDataNames.length);
this.heapDataNames = newHeapDataPool;
}
this.heapDataNames[position] = name;
}
public void saveData(int position, Object data) {
if (position >= this.heapDataPool.length) {
Object[] newHeapDataPool = new Object[heapDataPool.length + 5];
System.arraycopy(this.heapDataPool, 0, newHeapDataPool, 0, heapDataPool.length);
this.heapDataPool = newHeapDataPool;
}
this.heapDataPool[position] = data;
}
public Object loadData(int depth, int position) {
DataHeap heapData = this;
for (int i = 0; i <= depth; i++) {
if (i == depth) {
return heapData.heapDataPool[position];
}
heapData = heapData.parent;
if (heapData == null) {
break;
}
}
return null;
}
@Override
public DataHeap clone() {
DataHeap parent = null;
if (this.parent != null) {
parent = this.parent.clone();
}
DataHeap dataHeap = new DataHeap(parent);
dataHeap.depth = this.depth;
dataHeap.heapDataPool = this.heapDataPool.clone();
return dataHeap;
}
}