javax.ws.rs.core.GenericEntity Maven / Gradle / Ivy
/*
* #%L
* Apache Geronimo JAX-RS Spec 2.0
* %%
* Copyright (C) 2003 - 2014 The Apache Software Foundation
* %%
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* #L%
*/
package javax.ws.rs.core;
import java.lang.reflect.GenericArrayType;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
public class GenericEntity {
private final Class rawType;
private final Type type;
private final T entity;
protected GenericEntity(final T entity) {
if (entity == null) {
throw new IllegalArgumentException("The entity must not be null");
}
this.entity = entity;
this.type = GenericType.getTypeArgument(getClass(), GenericEntity.class);
this.rawType = entity.getClass();
}
public GenericEntity(final T entity, final Type genericType) {
if (entity == null || genericType == null) {
throw new IllegalArgumentException("Arguments must not be null.");
}
this.entity = entity;
this.rawType = entity.getClass();
checkTypeCompatibility(this.rawType, genericType);
this.type = genericType;
}
private void checkTypeCompatibility(final Class c, final Type t) {
if (t instanceof Class) {
Class ct = (Class) t;
if (ct.isAssignableFrom(c)) {
return;
}
} else if (t instanceof ParameterizedType) {
ParameterizedType pt = (ParameterizedType) t;
Type rt = pt.getRawType();
checkTypeCompatibility(c, rt);
return;
} else if (c.isArray() && (t instanceof GenericArrayType)) {
GenericArrayType at = (GenericArrayType) t;
Type rt = at.getGenericComponentType();
checkTypeCompatibility(c.getComponentType(), rt);
return;
}
throw new IllegalArgumentException("The type is incompatible with the class of the entity.");
}
public final Class getRawType() {
return rawType;
}
public final Type getType() {
return type;
}
public final T getEntity() {
return entity;
}
@Override
public boolean equals(Object obj) {
boolean result = this == obj;
if (!result && obj instanceof GenericEntity) {
GenericEntity that = (GenericEntity) obj;
return this.type.equals(that.type) && this.entity.equals(that.entity);
}
return result;
}
@Override
public int hashCode() {
return entity.hashCode() + type.hashCode() * 37 + 5;
}
@Override
public String toString() {
return "GenericEntity{" + entity.toString() + ", " + type.toString() + "}";
}
}