/**
* Copyright (c) 2013, impossibl.com
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of impossibl.com nor the names of its contributors may
* be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
package com.impossibl.postgres.system.procs;
import com.impossibl.postgres.api.data.Path;
import com.impossibl.postgres.system.Context;
import com.impossibl.postgres.types.PrimitiveType;
import com.impossibl.postgres.types.Type;
import com.impossibl.postgres.utils.GeometryParsers;
import java.io.IOException;
import io.netty.buffer.ByteBuf;
/**
* @author croudet
*
* @version $Revision: $, $Date: $, $Name: $, $Author: $
*/
public class Paths extends SimpleProcProvider {
public Paths() {
super(new TxtEncoder(), new TxtDecoder(), new BinEncoder(), new BinDecoder(), "path_");
}
static class BinDecoder extends BinaryDecoder {
@Override
public PrimitiveType getInputPrimitiveType() {
return PrimitiveType.Path;
}
@Override
public Class<?> getOutputType() {
return Path.class;
}
@Override
public Path decode(Type type, Short typeLength, Integer typeModifier, ByteBuf buffer, Context context) throws IOException {
int length = buffer.readInt();
if (length == -1) {
return null;
}
else if (length < 21) {
// at least one point
throw new IOException("invalid length " + length);
}
boolean closed = buffer.readByte() != 0;
int npts = buffer.readInt();
if (npts <= 0 || npts >= Integer.MAX_VALUE) {
throw new IOException("invalid number of points in external \"path\" value");
}
double[][] points = new double[npts][];
for (int i = 0; i < npts; ++i) {
double[] point = new double[2];
point[0] = buffer.readDouble();
point[1] = buffer.readDouble();
points[i] = point;
}
return new Path(points, closed);
}
}
static class BinEncoder extends BinaryEncoder {
@Override
public Class<?> getInputType() {
return Path.class;
}
@Override
public PrimitiveType getOutputPrimitiveType() {
return PrimitiveType.Path;
}
@Override
public void encode(Type type, ByteBuf buffer, Object val, Context context) throws IOException {
if (val == null) {
buffer.writeInt(-1);
}
else {
Path path = (Path) val;
double[][] points = path.getPoints();
// byte + int + npts * 2 points
int size = 1 + 4 + (points == null ? 0 : points.length * 8 * 2);
buffer.writeInt(size);
buffer.writeByte(path.isClosed() ? 1 : 0);
buffer.writeInt(points == null ? 0 : points.length);
if (points != null) {
for (int i = 0; i < points.length; ++i) {
double[] point = points[i];
buffer.writeDouble(point[0]);
buffer.writeDouble(point[1]);
}
}
}
}
}
static class TxtDecoder extends TextDecoder {
@Override
public PrimitiveType getInputPrimitiveType() {
return PrimitiveType.Path;
}
@Override
public Class<?> getOutputType() {
return Path.class;
}
@Override
public Path decode(Type type, Short typeLength, Integer typeModifier, CharSequence buffer, Context context) throws IOException {
return GeometryParsers.INSTANCE.parsePath(buffer);
}
}
static class TxtEncoder extends TextEncoder {
@Override
public Class<?> getInputType() {
return Path.class;
}
@Override
public PrimitiveType getOutputPrimitiveType() {
return PrimitiveType.Path;
}
@Override
public void encode(Type type, StringBuilder buffer, Object val, Context context) throws IOException {
if (val == null) {
return;
}
buffer.append(((Path) val).toString());
}
}
}