com.ryantenney.metrics.spring.MethodKey Maven / Gradle / Ivy
/**
* Copyright (C) 2012 Ryan W Tenney ([email protected])
*
* 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.
*/
package com.ryantenney.metrics.spring;
import java.lang.reflect.Method;
import java.util.Arrays;
class MethodKey {
private final String name;
private final Class returnType;
private final Class[] parameterTypes;
private final int hashCode;
public static MethodKey forMethod(Method method) {
return new MethodKey(method);
}
private MethodKey(Method method) {
this.name = method.getName();
this.returnType = method.getReturnType();
this.parameterTypes = method.getParameterTypes();
this.hashCode = computeHashCode();
}
@Override
public int hashCode() {
return hashCode;
}
private int computeHashCode() {
final int prime = 31;
int result = 1;
result = prime * result + name.hashCode();
result = prime * result + Arrays.hashCode(parameterTypes);
result = prime * result + returnType.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;
}
final MethodKey other = (MethodKey) obj;
return name.equals(other.name) && returnType.equals(other.returnType) && Arrays.equals(parameterTypes, other.parameterTypes);
}
@Override
public String toString() {
final StringBuilder sb = new StringBuilder();
sb.append(returnType.getSimpleName());
sb.append(' ');
sb.append(name);
sb.append('(');
boolean firstParam = true;
for (Class parameterType : parameterTypes) {
if (firstParam) {
firstParam = false;
}
else {
sb.append(", ");
}
sb.append(parameterType.getSimpleName());
}
sb.append(')');
return sb.toString();
}
}