/*
* Copyright 2016 NAVER Corp.
*
* 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.navercorp.pinpoint.profiler.instrument;
import com.navercorp.pinpoint.common.util.Asserts;
import java.lang.reflect.Method;
/**
* @author HyunGil Jeong
*/
public class SetterAnalyzer {
public SetterDetails analyze(Class<?> setterType) {
Asserts.notNull(setterType, "setterType");
if (!setterType.isInterface()) {
throw new IllegalArgumentException("setterType " + setterType + "is not an interface");
}
Method[] methods = setterType.getDeclaredMethods();
if (methods.length != 1) {
throw new IllegalArgumentException("Setter interface must have only one method: " + setterType.getName());
}
Method setter = methods[0];
Class<?>[] arguments = setter.getParameterTypes();
if (arguments.length != 1) {
throw new IllegalArgumentException("Setter interface method must have exactly 1 argument: " + setterType.getName());
}
Class<?> fieldType = arguments[0];
Class<?> returnType = setter.getReturnType();
if (returnType != void.class) {
throw new IllegalArgumentException("Setter must have return type void: " + setterType.getName());
}
return new SetterDetails(setter, fieldType);
}
public static final class SetterDetails {
private final Method setter;
private final Class<?> fieldType;
public SetterDetails(Method setter, Class<?> fieldType) {
this.setter = setter;
this.fieldType = fieldType;
}
public Method getSetter() {
return setter;
}
public Class<?> getFieldType() {
return fieldType;
}
}
}