/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*/
package jakarta.el;
import java.lang.annotation.Annotation;
import java.util.Arrays;
/**
* Provides information about the method to which a method expression resolves.
*
* @since EL 5.0
*/
public class MethodReference {
private final Object base;
private final MethodInfo methodInfo;
private final Annotation[] annotations;
private final Object[] evaluatedParameters;
public MethodReference(Object base, MethodInfo methodInfo, Annotation[] annotations, Object[] evaluatedParameters) {
this.base = base;
this.methodInfo = methodInfo;
this.annotations = annotations;
this.evaluatedParameters = evaluatedParameters;
}
/**
* Obtain the base object on which the method will be invoked.
*
* @return The base object on which the method will be invoked or {@code null} for literal method expressions.
*/
public Object getBase() {
return base;
}
/**
* Obtain the {@link MethodInfo} for the {@link MethodExpression} for which this {@link MethodReference} has been
* generated.
*
* @return The {@link MethodInfo} for the {@link MethodExpression} for which this {@link MethodReference} has been
* generated.
*/
public MethodInfo getMethodInfo() {
return this.methodInfo;
}
/**
* Obtain the annotations on the method to which the associated expression resolves.
*
* @return The annotations on the method to which the associated expression resolves. If the are no annotations,
* then an empty array is returned.
*/
public Annotation[] getAnnotations() {
return annotations;
}
/**
* Obtain the evaluated parameter values that will be passed to the method to which the associated expression
* resolves.
*
* @return The evaluated parameters.
*/
public Object[] getEvaluatedParameters() {
return evaluatedParameters;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + Arrays.hashCode(annotations);
result = prime * result + ((base == null) ? 0 : base.hashCode());
result = prime * result + Arrays.deepHashCode(evaluatedParameters);
result = prime * result + ((methodInfo == null) ? 0 : methodInfo.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
MethodReference other = (MethodReference) obj;
if (!Arrays.equals(annotations, other.annotations)) {
return false;
}
if (base == null) {
if (other.base != null) {
return false;
}
} else if (!base.equals(other.base)) {
return false;
}
if (!Arrays.deepEquals(evaluatedParameters, other.evaluatedParameters)) {
return false;
}
if (methodInfo == null) {
return other.methodInfo == null;
} else {
return methodInfo.equals(other.methodInfo);
}
}
}