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package org.glassfish.jersey.message.internal;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.annotation.Annotation;
import java.lang.reflect.Constructor;
import java.lang.reflect.Type;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicLong;
import javax.ws.rs.Consumes;
import javax.ws.rs.Produces;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.MultivaluedMap;
import javax.inject.Singleton;
import org.glassfish.jersey.internal.LocalizationMessages;
import org.glassfish.jersey.internal.util.ReflectionHelper;
import javax.ws.rs.core.NoContentException;
/**
* The basic types message body provider for {@link MediaType#TEXT_PLAIN} media type.
* <p/>
* The provider processes primitive types and also other {@link Number} implementations like {@link java.math.BigDecimal},
* {@link java.math.BigInteger}, {@link AtomicInteger}, {@link AtomicLong} and all other implementations which has one String
* argument constructor.
*
* @author Miroslav Fuksa (miroslav.fuksa at oracle.com)
* @author Marek Potociar (marek.potociar at oracle.com)
*/
@Produces({"text/plain"})
@Consumes({"text/plain"})
@Singleton
final class BasicTypesMessageProvider extends AbstractMessageReaderWriterProvider<Object> {
private static enum PrimitiveTypes {
BYTE(Byte.class, byte.class) {
@Override
public Object convert(String s) {
return Byte.valueOf(s);
}
},
SHORT(Short.class, short.class) {
@Override
public Object convert(String s) {
return Short.valueOf(s);
}
},
INTEGER(Integer.class, int.class) {
@Override
public Object convert(String s) {
return Integer.valueOf(s);
}
},
LONG(Long.class, long.class) {
@Override
public Object convert(String s) {
return Long.valueOf(s);
}
},
FLOAT(Float.class, float.class) {
@Override
public Object convert(String s) {
return Float.valueOf(s);
}
},
DOUBLE(Double.class, double.class) {
@Override
public Object convert(String s) {
return Double.valueOf(s);
}
},
BOOLEAN(Boolean.class, boolean.class) {
@Override
public Object convert(String s) {
return Boolean.valueOf(s);
}
},
CHAR(Character.class, char.class) {
@Override
public Object convert(String s) {
if (s.length() != 1) {
throw new MessageBodyProcessingException(LocalizationMessages
.ERROR_ENTITY_PROVIDER_BASICTYPES_CHARACTER_MORECHARS());
}
return s.charAt(0);
}
};
public static PrimitiveTypes forType(Class<?> type) {
for (PrimitiveTypes primitive : PrimitiveTypes.values()) {
if (primitive.supports(type)) {
return primitive;
}
}
return null;
}
private final Class<?> wrapper;
private final Class<?> primitive;
private PrimitiveTypes(Class<?> wrapper, Class<?> primitive) {
this.wrapper = wrapper;
this.primitive = primitive;
}
public abstract Object convert(String s);
public boolean supports(Class<?> type) {
return type == wrapper || type == primitive;
}
}
@Override
public boolean isReadable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType) {
return canProcess(type);
}
@Override
public Object readFrom(
Class<Object> type,
Type genericType,
Annotation[] annotations,
MediaType mediaType,
MultivaluedMap<String, String> httpHeaders,
InputStream entityStream) throws IOException, WebApplicationException {
final String entityString = readFromAsString(entityStream, mediaType);
if (entityString.isEmpty()) {
throw new NoContentException(LocalizationMessages.ERROR_READING_ENTITY_MISSING());
}
final PrimitiveTypes primitiveType = PrimitiveTypes.forType(type);
if (primitiveType != null) {
return primitiveType.convert(entityString);
}
final Constructor constructor = ReflectionHelper.getStringConstructor(type);
if (constructor != null) {
try {
return type.cast(constructor.newInstance(entityString));
} catch (Exception e) {
throw new MessageBodyProcessingException(LocalizationMessages.ERROR_ENTITY_PROVIDER_BASICTYPES_CONSTRUCTOR(type));
}
}
if (AtomicInteger.class.isAssignableFrom(type)) {
return new AtomicInteger((Integer) PrimitiveTypes.INTEGER.convert(entityString));
}
if (AtomicLong.class.isAssignableFrom(type)) {
return new AtomicLong((Long) PrimitiveTypes.LONG.convert(entityString));
}
throw new MessageBodyProcessingException(LocalizationMessages.ERROR_ENTITY_PROVIDER_BASICTYPES_UNKWNOWN(type));
}
@Override
public boolean isWriteable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType) {
return canProcess(type);
}
private boolean canProcess(Class<?> type) {
if (PrimitiveTypes.forType(type) != null) {
return true;
}
if (Number.class.isAssignableFrom(type)) {
final Constructor constructor = ReflectionHelper.getStringConstructor(type);
if (constructor != null) {
return true;
}
if (AtomicInteger.class.isAssignableFrom(type) || AtomicLong.class.isAssignableFrom(type)) {
return true;
}
}
return false;
}
@Override
public long getSize(Object t, Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType) {
return t.toString().length();
}
@Override
public void writeTo(
Object o,
Class<?> type,
Type genericType,
Annotation[] annotations,
MediaType mediaType,
MultivaluedMap<String, Object> httpHeaders,
OutputStream entityStream) throws IOException, WebApplicationException {
writeToAsString(o.toString(), entityStream, mediaType);
}
}