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/**
* 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.system.Context;
import com.impossibl.postgres.system.JavaTypeMapping;
import com.impossibl.postgres.types.Modifiers;
import com.impossibl.postgres.types.Type;
import static com.impossibl.postgres.system.SystemSettings.FIELD_LENGTH_MAX;
import static com.impossibl.postgres.types.Modifiers.LENGTH;
import java.io.IOException;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.net.URL;
import java.text.ParseException;
import java.util.HashMap;
import java.util.Map;
import static java.lang.Integer.min;
import io.netty.buffer.ByteBuf;
public class Strings extends SimpleProcProvider {
static final BinDecoder BINARY_DECODER = new BinDecoder();
static final BinEncoder BINARY_ENCODER = new BinEncoder();
static final TxtDecoder TEXT_DECODER = new TxtDecoder();
static final TxtEncoder TEXT_ENCODER = new TxtEncoder();
public Strings() {
super(TEXT_ENCODER, TEXT_DECODER, BINARY_ENCODER, BINARY_DECODER, new ModParser(),
"text", "varchar", "bpchar", "char", "enum_", "json_", "cstring_", "citext", "unknown", "regproc", "regtype", "regclass", "regoper");
}
private static Bools.TxtDecoder boolDecoder = new Bools.TxtDecoder();
private static Bools.TxtEncoder boolEncoder = new Bools.TxtEncoder();
private static Int2s.TxtDecoder shortDecoder = new Int2s.TxtDecoder();
private static Int2s.TxtEncoder shortEncoder = new Int2s.TxtEncoder();
private static Int4s.TxtDecoder intDecoder = new Int4s.TxtDecoder();
private static Int4s.TxtEncoder intEncoder = new Int4s.TxtEncoder();
private static Int8s.TxtDecoder longDecoder = new Int8s.TxtDecoder();
private static Int8s.TxtEncoder longEncoder = new Int8s.TxtEncoder();
private static Float4s.TxtDecoder floatDecoder = new Float4s.TxtDecoder();
private static Float4s.TxtEncoder floatEncoder = new Float4s.TxtEncoder();
private static Float8s.TxtDecoder doubleDecoder = new Float8s.TxtDecoder();
private static Float8s.TxtEncoder doubleEncoder = new Float8s.TxtEncoder();
private static Numerics.TxtDecoder decimalDecoder = new Numerics.TxtDecoder();
private static Numerics.TxtEncoder decimalEncoder = new Numerics.TxtEncoder();
private static Bytes.TxtEncoder bytesEncoder = new Bytes.TxtEncoder();
private static String convertInput(Context context, Object value, Object sourceContext) throws IOException {
if (value instanceof CharSequence) {
return value.toString();
}
StringBuilder out = new StringBuilder();
if (value instanceof Character) {
out.append(value);
}
else if (value instanceof Boolean) {
boolEncoder.encodeNativeValue(context, null, (Boolean) value, sourceContext, out);
}
else if (value instanceof Short) {
shortEncoder.encodeNativeValue(context, null, (Short) value, sourceContext, out);
}
else if (value instanceof Integer) {
intEncoder.encodeNativeValue(context, null, (Integer) value, sourceContext, out);
}
else if (value instanceof Long) {
longEncoder.encodeNativeValue(context, null, (Long) value, sourceContext, out);
}
else if (value instanceof Float) {
floatEncoder.encodeNativeValue(context, null, (Float) value, sourceContext, out);
}
else if (value instanceof Double) {
doubleEncoder.encodeNativeValue(context, null, (Double) value, sourceContext, out);
}
else if (value instanceof BigDecimal) {
decimalEncoder.encodeNativeValue(context, null, (BigDecimal) value, sourceContext, out);
}
else if (value instanceof byte[]) {
bytesEncoder.encodeValue(context, null, value, sourceContext, out);
}
else {
out.append(value);
}
return out.toString();
}
private static Object convertOutput(Context context, String decoded, Class targetClass, Object targetContext) throws IOException {
try {
if (targetClass == String.class) {
return decoded;
}
Type type = JavaTypeMapping.getType(targetClass, context.getRegistry());
if (type != null && type.getTextCodec() != null) {
return type.getTextCodec().getDecoder().decode(context, type, null, null, decoded, targetClass, targetContext);
}
if (targetClass == Boolean.class || targetClass == boolean.class) {
return boolDecoder.decodeNativeValue(context, null, null, null, decoded, Boolean.class, targetContext);
}
if (targetClass == Byte.class || targetClass == byte.class) {
return Byte.valueOf(decoded);
}
if (targetClass == Short.class || targetClass == short.class) {
return shortDecoder.decodeNativeValue(context, null, null, null, decoded, Short.class, targetContext);
}
if (targetClass == Integer.class || targetClass == int.class) {
return intDecoder.decodeNativeValue(context, null, null, null, decoded, Integer.class, targetContext);
}
if (targetClass == Long.class || targetClass == long.class) {
return longDecoder.decodeNativeValue(context, null, null, null, decoded, Long.class, targetContext);
}
if (targetClass == BigInteger.class) {
return new BigInteger(decoded);
}
if (targetClass == Float.class || targetClass == float.class) {
return floatDecoder.decodeNativeValue(context, null, null, null, decoded, Float.class, targetContext);
}
if (targetClass == Double.class || targetClass == double.class) {
return doubleDecoder.decodeNativeValue(context, null, null, null, decoded, Double.class, targetContext);
}
if (targetClass == BigDecimal.class) {
return decimalDecoder.decodeNativeValue(context, null, null, null, decoded, BigDecimal.class, targetContext);
}
if (targetClass == URL.class) {
return new URL(decoded);
}
return null;
}
catch (ParseException e) {
throw new IOException(e);
}
}
public static class BinDecoder extends AutoConvertingBinaryDecoder {
public BinDecoder() {
super(null, Strings::convertOutput);
enableRespectMaxLength();
}
@Override
public Class getDefaultClass() {
return String.class;
}
@Override
protected String decodeNativeValue(Context context, Type type, Short typeLength, Integer typeModifier, ByteBuf buffer, Class targetClass, Object targetContext) throws IOException {
int length = buffer.readableBytes();
byte[] bytes = new byte[length];
buffer.readBytes(bytes);
buffer.skipBytes(length - bytes.length);
CharSequence value = new String(bytes, context.getCharset());
Integer maxLength = context.getSetting(FIELD_LENGTH_MAX);
if (maxLength != null) {
value = value.subSequence(0, min(maxLength, value.length()));
}
return value.toString();
}
}
public static class BinEncoder extends BaseBinaryEncoder {
@Override
protected void encodeValue(Context context, Type type, Object value, Object sourceContext, ByteBuf buffer) throws IOException {
buffer.writeCharSequence(convertInput(context, value, sourceContext), context.getCharset());
}
}
public static class TxtDecoder extends AutoConvertingTextDecoder {
TxtDecoder() {
super(Strings::convertOutput);
enableRespectMaxLength();
}
@Override
public Class getDefaultClass() {
return String.class;
}
@Override
protected String decodeNativeValue(Context context, Type type, Short typeLength, Integer typeModifier, CharSequence buffer, Class targetClass, Object targetContext) throws IOException, ParseException {
CharSequence value = buffer;
Integer maxLength = context.getSetting(FIELD_LENGTH_MAX);
if (maxLength != null) {
value = value.subSequence(0, min(maxLength, value.length()));
}
return value.toString();
}
}
public static class TxtEncoder extends BaseTextEncoder {
@Override
protected void encodeValue(Context context, Type type, Object value, Object sourceContext, StringBuilder buffer) throws IOException {
buffer.append(convertInput(context, value, sourceContext));
}
}
private static class ModParser implements Modifiers.Parser {
@Override
public Map parse(long mod) {
Map mods = new HashMap<>();
if (mod > 4) {
mods.put(LENGTH, (int) (mod - 4));
}
return mods;
}
}
}