org.jpedal.utils.repositories.Vector_Object 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_Object.java
* ---------------
*/
package org.jpedal.utils.repositories;
import java.awt.BasicStroke;
import java.awt.Shape;
import java.awt.TexturePaint;
import java.awt.geom.*;
import java.awt.image.BufferedImage;
import java.awt.image.RenderedImage;
import java.io.*;
import javax.imageio.ImageIO;
import org.jpedal.color.PdfTexturePaint;
import org.jpedal.examples.handlers.DefaultImageHelper;
import org.jpedal.fonts.glyph.T1Glyph;
import org.jpedal.fonts.glyph.T3Glyph;
import org.jpedal.fonts.tt.TTGlyph;
import org.jpedal.io.PathSerializer;
import org.jpedal.utils.LogWriter;
/**
* Provides the functionality/convenience of a Vector for objects -
*
* Much faster because not synchronized and no cast -
* Does not double in size each time
*/
@SuppressWarnings("MagicConstant")
public class Vector_Object 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;
/*
* flags to indicate which type of custom serialization is taking place
*/
private static final Integer GENERIC = 1;
private static final Integer BASICSTROKE = 2;
private static final Integer BUFFERED_IMAGE = 3;
private static final Integer GENERAL_PATH = 4;
private static final Integer T1GLYPH = 5;
private static final Integer TTGLYPH = 6;
private static final Integer AREA = 7;
private static final Integer RECT = 8;
private static final Integer T3GLYPH = 9;
private static final Integer TEXTUREDPAINT = 10;
//holds the data
private Object[] items = new Object[max_size];
//default size
public Vector_Object() {
}
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_Object(final int number) {
max_size = number;
items = new Object[max_size];
}
/**
* extract underlying data
*/
public final Object[] get() {
return items;
}
/**
* pull item from top as in LIFO stack
*/
public final Object pull() {
if (current_item > 0) {
current_item--;
}
return (items[current_item]);
}
/**
* put item at top as in LIFO stack
*/
public final void push(final Object value) {
checkSize(current_item);
items[current_item] = value;
current_item++;
}
/**
* see if value present
*/
public final boolean contains(final Object value) {
boolean flag = false;
for (int i = 0; i < current_item; i++) {
if (items[i].equals(value)) {
i = current_item + 1;
flag = true;
}
}
return flag;
}
/**
* add an item
*/
public final void addElement(final Object value) {
//if(current_item>6370 && value instanceof Shape)
//System.out.println("Added into array"+current_item+" "+((Shape)value).getBounds());
checkSize(current_item);
items[current_item] = value;
current_item++;
}
/**
* set an element
*/
public final void setElementAt(final Object new_name, final int id) {
if (id >= max_size) {
checkSize(id);
}
items[id] = new_name;
}
/**
* return element at
*/
public final Object elementAt(final int id) {
if (id >= max_size) {
return null;
} else {
return items[id];
}
}
/**
* replace underlying data
*/
public final void set(final Object[] new_items) {
items = new_items;
}
/**
* clear the array
*/
public final void clear() {
checkPoint = -1;
//items = null;
//holds the data
//items = new Object[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;
}
/**
* return the size+1 as in last item (so an array of 0 values is 1)
*/
public final int size() {
return current_item + 1;
}
/**
* remove element at
*/
public final void removeElementAt(final int id) {
if (id >= 0) {
//copy all items back one to over-write
System.arraycopy(items, id + 1, items, id, current_item - 1 - id);
//flush last item
items[current_item - 1] = null;
} else {
items[0] = null;
}
//reduce counter
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 Object[] temp = items;
items = new Object[max_size];
System.arraycopy(temp, 0, items, 0, old_size);
//increase size increase for next time
increment_size = incrementSize(increment_size);
}
}
/**
* method to serialize each element in this collection
*
* NOT PART OF API and subject to change (DO NOT USE)
*
* @param bos - the output stream to write the objects 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 each item in the collection, and if its an object that
* wont serialize automaticaly, then perform a custom serialization, otherwise
* let the default serialization handle it
*/
for (int i = 0; i < max_size; i++) {
final Object nextObj = items[i];
if (nextObj instanceof BasicStroke) {
//basicStrokes++;
/* write out a flag to indicate this is a BasicStroke object */
os.writeObject(BASICSTROKE);
final BasicStroke stroke = (BasicStroke) items[i];
/* write out the raw elements of the BasicStroke */
os.writeFloat(stroke.getLineWidth());
os.writeInt(stroke.getEndCap());
os.writeInt(stroke.getLineJoin());
os.writeFloat(stroke.getMiterLimit());
os.writeObject(stroke.getDashArray());
os.writeFloat(stroke.getDashPhase());
} else if (nextObj instanceof Rectangle2D) {
//basicStrokes++;
/* write out a flag to indicate this is a BasicStroke object */
os.writeObject(RECT);
final Rectangle2D rect = (Rectangle2D) items[i];
/* write out the raw elements of the Rect */
os.writeDouble(rect.getBounds2D().getX());
os.writeDouble(rect.getBounds2D().getY());
os.writeDouble(rect.getBounds2D().getWidth());
os.writeDouble(rect.getBounds2D().getHeight());
} else if (nextObj instanceof BufferedImage) {
//bufferedImages++;
/* write out a flag to indicate this is a BufferedImage object */
os.writeObject(BUFFERED_IMAGE);
final ByteArrayOutputStream baos = new ByteArrayOutputStream();
/* store the image in a byte array */
ImageIO.write((RenderedImage) nextObj, "png", baos);
/* write the image as a byte array to the stream */
os.writeObject(baos.toByteArray());
} else if (nextObj instanceof GeneralPath) {
//generalPaths++;
/* write out a flag to indicate this is a GeneralPath object */
os.writeObject(Vector_Object.GENERAL_PATH);
/* use out custom path serializer to serialize the path */
PathSerializer.serializePath(os, ((Shape) items[i]).getPathIterator(new AffineTransform()));
} else if (nextObj instanceof T1Glyph) {
//t1glyphs++;
/* write out a flag to indicate this is a T1Glyph object */
os.writeObject(T1GLYPH);
((T1Glyph) nextObj).flushArea();
/* use default serialization to serialize the object except the paths */
os.writeObject(nextObj);
/* now serialize the paths to the stream */
((T1Glyph) nextObj).writePathsToStream(os);
} else if (nextObj instanceof TTGlyph) {
//ttglyphs++;
/* write out a flag to indicate this is a TTGlyph object */
os.writeObject(TTGLYPH);
((TTGlyph) nextObj).flushArea();
/* use default serialization to serialize the object except the paths */
os.writeObject(nextObj);
/* now serialize the paths to the stream */
((TTGlyph) nextObj).writePathsToStream(os);
} else if (nextObj instanceof T3Glyph) {
//t3glyphs++;
/* write out a flag to indicate this is a TTGlyph object */
os.writeObject(T3GLYPH);
//((T3Glyph)nextObj).flushArea(); not needed at present
/*convert to data stream and save*/
((T3Glyph) nextObj).writePathsToStream(os);
} else if (nextObj instanceof PdfTexturePaint) {
//paints++;
/* write out a flag to indicate this is a Texture object */
os.writeObject(TEXTUREDPAINT);
/* write the image as a byte array to the stream */
final ByteArrayOutputStream baos = new ByteArrayOutputStream();
/* store the image in a byte array */
ImageIO.write(((TexturePaint) nextObj).getImage(), "png", baos);
os.writeObject(baos.toByteArray());
/*and anchor as well*/
final Rectangle2D rect = ((TexturePaint) nextObj).getAnchorRect();
os.writeDouble(rect.getBounds2D().getX());
os.writeDouble(rect.getBounds2D().getY());
os.writeDouble(rect.getBounds2D().getWidth());
os.writeDouble(rect.getBounds2D().getHeight());
} else if (nextObj instanceof Area) {
//areas++;
/* write out a flag to indicate this is a TTGlyph object */
os.writeObject(AREA);
final Area area = (Area) items[i];
/* extract the PathIterator from the Area object */
final PathIterator pathIterator = area.getPathIterator(new AffineTransform());
/* use out custom path serializer to serialize the path */
PathSerializer.serializePath(os, pathIterator);
} else {
/*
* if the object is not on our list to custom serialize, then let the
* default serialization handle it
*/
try {
/* write out a flag to indicate this is a generic object */
os.writeObject(GENERIC);
/* serialize the object to the stream */
os.writeObject(nextObj);
} catch (final Exception e) {
LogWriter.writeLog("Exception: " + e.getMessage());
}
}
}
os.close();
}
/**
* method to deserialize each object in the input stream
*
* NOT PART OF API and subject to change (DO NOT USE)
*
* @param bis - the input stream to read from
* @throws IOException
* @throws ClassNotFoundException
*/
public void restoreFromStream(final ByteArrayInputStream bis) throws IOException, ClassNotFoundException {
final ObjectInput os = new ObjectInputStream(bis);
/* read fromt the stream the number of objects in this collection */
final int size = (Integer) os.readObject();
max_size = size;
items = new Object[size];
Object nextObject;
Integer type;
/*
* iterate through each object in the input stream, and store into our
* internal collection
*/
for (int i = 0; i < size; i++) {
/* read what type this object is going to be */
type = (Integer) os.readObject();
if (type.compareTo(BASICSTROKE) == 0) {
/* retrieve the raw data from the BasicStroke */
final float w = os.readFloat();
final int current_line_cap_style = os.readInt();
final int current_line_join_style = os.readInt();
final float mitre_limit = os.readFloat();
final float[] current_line_dash_array = (float[]) os.readObject();
final float current_line_dash_phase = os.readFloat();
/* create a new BasicStroke object based on the raw data */
nextObject = new BasicStroke(w, current_line_cap_style, current_line_join_style, mitre_limit, current_line_dash_array, current_line_dash_phase);
} else if (type.compareTo(RECT) == 0) {
final float x = os.readFloat();
final float y = os.readFloat();
final float w = os.readFloat();
final float h = os.readFloat();
nextObject = new Rectangle2D.Float(x, y, w, h);
} else if (type.compareTo(BUFFERED_IMAGE) == 0) {
/* read in the bytes that make up this image */
final byte[] bytes = (byte[]) os.readObject();
/* read the bytes in and rebuild the image */
nextObject = DefaultImageHelper.read(bytes);
} else if (type.compareTo(GENERAL_PATH) == 0) {
/* use our custom path deserializer to read in the path */
nextObject = PathSerializer.deserializePath(os);
} else if (type.compareTo(T1GLYPH) == 0) {
/* read in the entire glyph, except the paths */
final T1Glyph glyph = (T1Glyph) os.readObject();
/*
* we now need to extract the paths for this glyph from the stream
*/
/* the number of paths in the glyph */
final int count = (Integer) os.readObject();
final GeneralPath[] paths = new GeneralPath[count];
/* iterate through the stream, and deserialize each path */
for (int j = 0; j < count; j++) {
paths[j] = PathSerializer.deserializePath(os);
}
/*
* now we need to create a new Vector_Path object, and pass in the
* paths we have just exrtracted from the sream
*/
final Vector_Path vp = new Vector_Path();
vp.set(paths);
vp.setCurrent_item(paths.length);
/* set the Vector_Path object in the glyph */
glyph.setPaths(vp);
nextObject = glyph;
} else if (type.compareTo(TTGLYPH) == 0) {
/* read in the entire glyph, except the paths */
final TTGlyph glyph = (TTGlyph) os.readObject();
/*
* we now need to extract the paths for this glyph from the stream
*/
/* the number of paths in the glyph */
final int count = (Integer) os.readObject();
final GeneralPath[] paths = new GeneralPath[count];
/* iterate through the stream, and deserialize each path */
for (int j = 0; j < count; j++) {
paths[j] = PathSerializer.deserializePath(os);
}
/*
* now we need to create a new Vector_Path object, and pass in the
* paths we have just exrtracted from the sream
*/
final Vector_Path vp = new Vector_Path();
vp.set(paths);
vp.setCurrent_item(paths.length);
/* set the Vector_Path object in the glyph */
glyph.setPaths(vp);
nextObject = glyph;
} else if (type.compareTo(T3GLYPH) == 0) {
nextObject = new T3Glyph(os);
} else if (type.compareTo(TEXTUREDPAINT) == 0) {
//restore image
final byte[] bytes = (byte[]) os.readObject();
/* read the bytes in and rebuild the image */
final BufferedImage img = DefaultImageHelper.read(bytes);
/*and the rectangle*/
final float x = os.readFloat();
final float y = os.readFloat();
final float w = os.readFloat();
final float h = os.readFloat();
final Rectangle2D anchor = new Rectangle2D.Float(x, y, w, h);
nextObject = new PdfTexturePaint(img, anchor);
} else if (type.compareTo(AREA) == 0) {
/* deserialize the path that makes up this Area */
final GeneralPath path = PathSerializer.deserializePath(os);
/* create a new Area based on the path */
nextObject = new Area(path);
} else {
/*
* this object has been serialized using the default mechanism,
* so just deserialize normaly
*/
nextObject = os.readObject();
}
items[i] = nextObject;
}
}
public void trim() {
final Object[] newItems = new Object[current_item];
System.arraycopy(items, 0, newItems, 0, current_item);
items = newItems;
max_size = current_item;
}
}