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/*
* ===========================================
* Java Pdf Extraction Decoding Access Library
* ===========================================
*
* Project Info: http://www.idrsolutions.com
* Help section for developers at http://www.idrsolutions.com/java-pdf-library-support/
*
* (C) Copyright 1997-2013, IDRsolutions and Contributors.
*
* This file is part of JPedal
*
This library 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 2.1 of the License, or (at your option) any later version.
This library 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 library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* ---------------
* Vector_Double.java
* ---------------
*/
package org.jpedal.utils.repositories;
import java.io.Serializable;
import java.util.Arrays;
/**
* Provides the functionality/convenience of a Vector for Doubles
*
* Much faster because not synchronized and no cast Does not double in size each time
*/
public class Vector_Double implements Serializable {
private static final long serialVersionUID = 643640502419161703L;
// how much we resize each time - will be doubled up to 160
int increment_size = 1000;
protected int current_item = 0;
// current max size
int max_size = 250;
// holds the data
private double[] items = new double[this.max_size];
// default size
public Vector_Double() {
}
private int checkPoint = -1;
/**
* used to store end of PDF components
*/
public void resetToCheckpoint() {
if (this.checkPoint != -1) this.current_item = this.checkPoint;
this.checkPoint = -1;
}
/**
* used to rollback array to point
*/
public void setCheckpoint() {
if (this.checkPoint == -1) this.checkPoint = this.current_item;
}
protected static int incrementSize(int increment_size) {
if (increment_size < 8000) increment_size = increment_size * 4;
else
if (increment_size < 16000) increment_size = increment_size * 2;
else increment_size = increment_size + 2000;
return increment_size;
}
// set size
public Vector_Double(int number) {
this.max_size = number;
this.items = new double[this.max_size];
}
/**
* extract underlying data
*/
final public double[] get() {
return this.items;
}
// /////////////////////////////////
/**
* remove element at
*/
final public void removeElementAt(int id) {
if (id >= 0) {
// copy all items back one to over-write
System.arraycopy(this.items, id + 1, this.items, id, this.current_item - 1 - id);
// flush last item
this.items[this.current_item - 1] = 0;
}
else this.items[0] = 0;
// reduce counter
this.current_item--;
}
// //////////////////////////////////
/**
* see if value present
*/
final public boolean contains(int value) {
boolean flag = false;
for (int i = 0; i < this.current_item; i++) {
if (this.items[i] == value) {
i = this.current_item + 1;
flag = true;
}
}
return flag;
}
// /////////////////////////////////
/**
* add an item
*/
final public void addElement(double value) {
checkSize(this.current_item);
this.items[this.current_item] = value;
this.current_item++;
}
// /////////////////////////////////
/**
* replace underlying data
*/
final public void set(double[] new_items) {
this.items = new_items;
}
// /////////////////////////////////
/**
* remove element at
*/
final public double elementAt(int id) {
if (id >= this.max_size) return 0d;
else return this.items[id];
}
// /////////////////////////////////
/**
* clear the array
*/
final public void clear() {
this.checkPoint = -1;
// items = null;
// holds the data
// items = new double[max_size];
if (this.current_item > 0) {
for (int i = 0; i < this.current_item; i++)
this.items[i] = 0d;
}
else {
for (int i = 0; i < this.max_size; i++)
this.items[i] = 0d;
}
this.current_item = 0;
}
// ///////////////////////////////////
/**
* pull item from top as in LIFO stack
*/
final public double pull() {
if (this.current_item > 0) this.current_item--;
return (this.items[this.current_item]);
}
// ///////////////////////////////////
/**
* put item at top as in LIFO stack
*/
final public void push(double value) {
checkSize(this.current_item);
this.items[this.current_item] = value;
this.current_item++;
}
// /////////////////////////////////
/**
* return the size
*/
final public int size() {
return this.current_item + 1;
}
// /////////////////////////////////
/**
* set an element
*/
final public void setElementAt(double new_name, int id) {
if (id >= this.max_size) checkSize(id);
this.items[id] = new_name;
}
// //////////////////////////////////
/**
* check the size of the array and increase if needed
*/
final private void checkSize(int i) {
if (i >= this.max_size) {
int old_size = this.max_size;
this.max_size = this.max_size + this.increment_size;
// allow for it not creating space
if (this.max_size <= i) this.max_size = i + this.increment_size + 2;
double[] temp = this.items;
this.items = new double[this.max_size];
System.arraycopy(temp, 0, this.items, 0, old_size);
// increase size increase for next time
this.increment_size = incrementSize(this.increment_size);
}
}
public void trim() {
double[] newItems = new double[this.current_item];
System.arraycopy(this.items, 0, newItems, 0, this.current_item);
this.items = newItems;
this.max_size = this.current_item;
}
/** reset pointer used in add to remove items above */
public void setSize(int currentItem) {
this.current_item = currentItem;
}
@Override
public String toString() {
StringBuilder builder = new StringBuilder();
builder.append("Vector_Double [current_item=");
builder.append(this.current_item);
builder.append(", ");
if (this.items != null && this.size()>0) {
builder.append("items=");
builder.append("[");
for (int i = 0; i < this.size(); i++) {
builder.append(this.items[i]);
builder.append(", ");
}
builder.append("]]");
}
return builder.toString();
}
}