nl.tudelft.simulation.dsol.animation.gis.SerializablePath Maven / Gradle / Ivy
package nl.tudelft.simulation.dsol.animation.gis;
import java.awt.Shape;
import java.awt.geom.Path2D;
import java.awt.geom.PathIterator;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
/**
* The SerializablePath class is a serializable version of the java.awt.geom.Path2D.Float class.
*
* Copyright (c) 2020-2024 Delft University of Technology, Jaffalaan 5, 2628 BX Delft, the Netherlands. All rights reserved. See
* for project information DSOL Manual. The DSOL
* project is distributed under a three-clause BSD-style license, which can be found at
* DSOL License.
*
* @author Alexander Verbraeck
*/
public class SerializablePath extends Path2D.Float implements Serializable, Shape, Cloneable
{
/**
* Construct a default general path that can be serialized.
*/
public SerializablePath()
{
super();
}
/**
* constructs a new SerializablePath with a winding rule.
* @param rule int; the windingRule
*/
public SerializablePath(final int rule)
{
super(rule);
}
/**
* constructs a new SerializablePath with a winding rule and a capacity.
* @param rule int; the windingRule
* @param initialCapacity int; the initial capacity
*/
public SerializablePath(final int rule, final int initialCapacity)
{
super(rule, initialCapacity);
}
/**
* constructs a new SerializablePath based on a shape.
* @param s Shape; the shape
*/
public SerializablePath(final Shape s)
{
super(s);
}
/**
* writes a float array of points to a stream.
* @param out ObjectOutputStream; the output stream
* @param array float[]; the array
* @param length int; the length
* @throws IOException on exception
*/
private void writeFloatArray(final ObjectOutputStream out, final float[] array, final int length) throws IOException
{
for (int i = 0; i < length; i++)
{
out.writeFloat(array[i]);
}
}
/**
* Serialized an object to the stream.
* @param out ObjectOutputStream; the stream
* @throws IOException on IO failure
*/
private void writeObject(final ObjectOutputStream out) throws IOException
{
out.writeInt(getWindingRule());
float[] coords = new float[6];
PathIterator i = getPathIterator(null);
// Now the Path iterator is present, we simply walk along the shape and serialize the points.
while (!i.isDone())
{
int segment = i.currentSegment(coords);
out.writeInt(segment);
switch (segment)
{
case PathIterator.SEG_CLOSE:
writeFloatArray(out, coords, 0);
// no float is serialized.. Keeps the bytestream as minimal as possible
break;
case PathIterator.SEG_CUBICTO:
writeFloatArray(out, coords, 6);
// All 6 floats are used and therefore serialized.
break;
case PathIterator.SEG_LINETO:
writeFloatArray(out, coords, 2);
// 2 floats are used and serialized. Keeps the bytestream as minimal as possible
break;
case PathIterator.SEG_MOVETO:
writeFloatArray(out, coords, 2);
// 2 floats are used and serialized. Keeps the bytestream as minimal as possible
break;
case PathIterator.SEG_QUADTO:
writeFloatArray(out, coords, 4);
// 2 floats are used and serialized.. Keeps the bytestream as minimal as possible
break;
default:
throw new RuntimeException("unknown segment");
}
i.next();
}
out.writeInt(-1); // We are ready and give an end-signal
}
/**
* Reads a serialized object from a stream.
* @param in ObjectInputStream; the input stream
* @throws IOException on IO Exception
*/
private void readObject(final ObjectInputStream in) throws IOException
{
int segment;
while ((segment = in.readInt()) != -1)
// The -1 value was our ending point.
{
switch (segment)
{
case PathIterator.SEG_CLOSE:
closePath();
break;
case PathIterator.SEG_CUBICTO:
curveTo(in.readFloat(), in.readFloat(), in.readFloat(), in.readFloat(), in.readFloat(), in.readFloat());
break;
case PathIterator.SEG_LINETO:
lineTo(in.readFloat(), in.readFloat());
break;
case PathIterator.SEG_MOVETO:
moveTo(in.readFloat(), in.readFloat());
break;
case PathIterator.SEG_QUADTO:
quadTo(in.readFloat(), in.readFloat(), in.readFloat(), in.readFloat());
break;
default:
throw new RuntimeException("unknown segment");
}
}
}
}