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package io.dico.dicore.command.parameter.type;
import com.google.common.collect.BiMap;
import com.google.common.collect.HashBiMap;
import com.google.common.collect.Maps;
import java.lang.annotation.Annotation;
import java.util.Objects;
/**
* More appropriate name: ParameterTypeKey
*/
public class ParameterKey {
private final Class<?> returnType;
private final Class<? extends Annotation> annotationClass;
// just a marker, not used in equals or hashCode().
// returnType is never primitive
private boolean isPrimitive;
public ParameterKey(Class<?> returnType) {
this(returnType, null);
}
public ParameterKey(Class<?> returnType, Class<? extends Annotation> annotationClass) {
boolean isPrimitive = returnType.isPrimitive();
if (isPrimitive) {
returnType = primitivesToWrappers.get(returnType);
}
this.returnType = Objects.requireNonNull(returnType);
this.annotationClass = annotationClass;
this.isPrimitive = isPrimitive;
}
public Class<?> getReturnType() {
return returnType;
}
public Class<? extends Annotation> getAnnotationClass() {
return annotationClass;
}
@Override
public boolean equals(Object o) {
return this == o || (o instanceof ParameterKey && equals((ParameterKey) o));
}
public boolean equals(ParameterKey that) {
return returnType == that.returnType && annotationClass == that.annotationClass;
}
@Override
public int hashCode() {
int result = returnType.hashCode();
result = 31 * result + (annotationClass != null ? annotationClass.hashCode() : 0);
return result;
}
private static Class<?> getPrimitiveWrapperClass(Class<?> primitiveClass) {
if (!primitiveClass.isPrimitive()) return null;
switch (primitiveClass.getName()) {
case "boolean":
return Boolean.class;
case "char":
return Character.class;
case "byte":
return Byte.class;
case "short":
return Short.class;
case "int":
return Integer.class;
case "float":
return Float.class;
case "long":
return Long.class;
case "double":
return Double.class;
case "void":
return Void.class;
default:
throw new InternalError();
}
}
private static final BiMap<Class<?>, Class<?>> primitivesToWrappers;
static {
HashBiMap<Class<?>, Class<?>> tmp = HashBiMap.create();
tmp.put(Boolean.TYPE, Boolean.class);
tmp.put(Character.TYPE, Character.class);
tmp.put(Byte.TYPE, Byte.class);
tmp.put(Short.TYPE, Short.class);
tmp.put(Integer.TYPE, Integer.class);
tmp.put(Float.TYPE, Float.class);
tmp.put(Long.TYPE, Long.class);
tmp.put(Double.TYPE, Double.class);
tmp.put(Void.TYPE, Void.class);
primitivesToWrappers = Maps.unmodifiableBiMap(tmp);
}
}
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