org.jpedal.utils.repositories.Vector_Shape Maven / Gradle / Ivy
/*
* ===========================================
* Java Pdf Extraction Decoding Access Library
* ===========================================
*
* Project Info: http://www.idrsolutions.com
* Help section for developers at http://www.idrsolutions.com/support/
*
* (C) Copyright 1997-2017 IDRsolutions and Contributors.
*
* This file is part of JPedal/JPDF2HTML5
*
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_Shape.java
* ---------------
*/
package org.jpedal.utils.repositories;
import java.awt.geom.AffineTransform;
import java.awt.geom.Area;
import java.awt.geom.GeneralPath;
import java.awt.geom.PathIterator;
import java.io.*;
import org.jpedal.io.PathSerializer;
/**
* Provides the functionality/convenience of a Vector for ints
*
* Much faster because not synchronized and no cast
* Does not double in size each time
*/
public class Vector_Shape implements Serializable {
//how much we resize each time - will be doubled up to 160
int increment_size = 1000;
protected int current_item;
//current max size
int max_size = 250;
//holds the data
private Area[] items = new Area[max_size];
////////////////////////////////////
//default size
public Vector_Shape() {
}
private int checkPoint = -1;
/**
* used to store end of PDF components
*/
public void resetToCheckpoint() {
if (checkPoint != -1) {
current_item = checkPoint;
}
checkPoint = -1;
}
/**
* used to rollback array to point
*/
public void setCheckpoint() {
if (checkPoint == -1) {
checkPoint = current_item;
}
}
protected static int incrementSize(int increment_size) {
if (increment_size < 8000) {
increment_size *= 4;
} else if (increment_size < 16000) {
increment_size *= 2;
} else {
increment_size += 2000;
}
return increment_size;
}
//set size
public Vector_Shape(final int number) {
max_size = number;
items = new Area[max_size];
}
/**
* extract underlying data
*/
public final Area[] get() {
return items;
}
///////////////////////////////////
/**
* clear the array
*/
public final void clear() {
checkPoint = -1;
//items = null;
//holds the data
//items = new Area[max_size];
if (current_item > 0) {
for (int i = 0; i < current_item; i++) {
items[i] = null;
}
} else {
for (int i = 0; i < max_size; i++) {
items[i] = null;
}
}
current_item = 0;
}
/**
* add an item
*/
public final void addElement(final Area value) {
checkSize(current_item);
items[current_item] = value;
current_item++;
}
/**
* check the size of the array and increase if needed
*/
private void checkSize(final int i) {
if (i >= max_size) {
final int old_size = max_size;
max_size += increment_size;
//allow for it not creating space
if (max_size <= i) {
max_size = i + increment_size + 2;
}
final Area[] temp = items;
items = new Area[max_size];
System.arraycopy(temp, 0, items, 0, old_size);
//increase size increase for next time
increment_size = incrementSize(increment_size);
}
}
/**
* writes out the shapes in this collection to the ByteArrayOutputStream
*
* NOT PART OF API and subject to change (DO NOT USE)
*
* @param bos - the ByteArrayOutputStream to write out to
* @throws IOException
*/
public void writeToStream(final ByteArrayOutputStream bos) throws IOException {
final ObjectOutput os = new ObjectOutputStream(bos);
/* size of array as first item */
os.writeObject(max_size);
/* iterate through the array, and write out each Area individualy */
for (int i = 0; i < max_size; i++) {
final Area nextObj = items[i];
if (nextObj == null) {
os.writeObject(null);
} else {
final PathIterator pathIterator = nextObj.getPathIterator(new AffineTransform());
PathSerializer.serializePath(os, pathIterator);
}
}
}
/**
* restore the shapes from the input stream into this collections
*
* NOT PART OF API and subject to change (DO NOT USE)
*
* @param bis - ByteArrayInputStream to read from
* @throws IOException
* @throws ClassNotFoundException
*/
public void restoreFromStream(final ByteArrayInputStream bis) throws IOException, ClassNotFoundException {
final ObjectInput os = new ObjectInputStream(bis);
/* the number of elements in this collection */
final int size = (Integer) os.readObject();
max_size = size;
items = new Area[size];
/*
* iterate through each item in the stream and store each object in
* the collection
*/
for (int i = 0; i < size; i++) {
final GeneralPath path = PathSerializer.deserializePath(os);
if (path == null) {
items[i] = null;
} else {
items[i] = new Area(path);
}
}
}
public void trim() {
final Area[] newItems = new Area[current_item];
System.arraycopy(items, 0, newItems, 0, current_item);
items = newItems;
max_size = current_item;
}
}