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package org.glassfish.tyrus.core;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.websocket.DecodeException;
import javax.websocket.Decoder;
/**
* Collection of decoders for all primitive types.
*
* @author Martin Matula (martin.matula at oracle.com)
* @author Danny Coward (danny.coward at oracle.com)
* @author Stepan Kopriva (stepan.kopriva at oracle.com)
*/
public abstract class PrimitiveDecoders<T> extends CoderAdapter implements Decoder.Text<T> {
public static final List<Class<? extends Decoder>> ALL;
public static final Map<Class<?>, Decoder.Text<?>> ALL_INSTANCES;
static {
ALL = Collections.unmodifiableList(Arrays.<Class<? extends Decoder>>asList(
BooleanDecoder.class,
ByteDecoder.class,
CharacterDecoder.class,
DoubleDecoder.class,
FloatDecoder.class,
IntegerDecoder.class,
LongDecoder.class,
ShortDecoder.class
));
ALL_INSTANCES = getAllInstances();
}
@Override
public boolean willDecode(String s) {
return true;
}
public static class BooleanDecoder extends PrimitiveDecoders<Boolean> {
@Override
public Boolean decode(String s) throws DecodeException {
Boolean result;
try {
result = Boolean.valueOf(s);
} catch (Exception e) {
throw new DecodeException(s, "Decoding failed", e);
}
return result;
}
}
public static class ByteDecoder extends PrimitiveDecoders<Byte> {
@Override
public Byte decode(String s) throws DecodeException {
Byte result;
try {
result = Byte.valueOf(s);
} catch (Exception e) {
throw new DecodeException(s, "Decoding failed", e);
}
return result; }
}
public static class CharacterDecoder extends PrimitiveDecoders<Character> {
@Override
public Character decode(String s) throws DecodeException {
Character result;
try {
result = s.charAt(0);
} catch (Exception e) {
throw new DecodeException(s, "Decoding failed", e);
}
return result;
}
}
public static class DoubleDecoder extends PrimitiveDecoders<Double> {
@Override
public Double decode(String s) throws DecodeException {
Double result;
try {
result = Double.valueOf(s);
} catch (Exception e) {
throw new DecodeException(s, "Decoding failed", e);
}
return result; }
}
public static class FloatDecoder extends PrimitiveDecoders<Float> {
@Override
public Float decode(String s) throws DecodeException {
Float result;
try {
result = Float.valueOf(s);
} catch (Exception e) {
throw new DecodeException(s, "Decoding failed", e);
}
return result; }
}
public static class IntegerDecoder extends PrimitiveDecoders<Integer> {
@Override
public Integer decode(String s) throws DecodeException {
Integer result;
try {
result = Integer.valueOf(s);
} catch (Exception e) {
throw new DecodeException(s, "Decoding failed", e);
}
return result; }
}
public static class LongDecoder extends PrimitiveDecoders<Long> {
@Override
public Long decode(String s) throws DecodeException {
Long result;
try {
result = Long.valueOf(s);
} catch (Exception e) {
throw new DecodeException(s, "Decoding failed", e);
}
return result; }
}
public static class ShortDecoder extends PrimitiveDecoders<Short> {
@Override
public Short decode(String s) throws DecodeException {
Short result;
try {
result = Short.valueOf(s);
} catch (Exception e) {
throw new DecodeException(s, "Decoding failed", e);
}
return result; }
}
private static Map<Class<?>, Decoder.Text<?>> getAllInstances() {
Map<Class<?>, Decoder.Text<?>> map = new HashMap<Class<?>, Decoder.Text<?>>();
for (Class<? extends Decoder> dec : ALL) {
Class<?> type = ReflectionHelper.getClassType(dec, Decoder.Text.class);
try {
map.put(type, (Decoder.Text<?>) dec.newInstance());
} catch (Exception e) {
Logger.getLogger(PrimitiveDecoders.class.getName()).log(Level.WARNING,String.format("Decoder %s could not have been instantiated.",dec));
}
}
return map;
}
}