com.vaadin.server.ServerRpcMethodInvocation Maven / Gradle / Ivy
/*
* Vaadin Framework 7
*
* Copyright (C) 2000-2024 Vaadin Ltd
*
* This program is available under Vaadin Commercial License and Service Terms.
*
* See for the full
* license.
*/
package com.vaadin.server;
import java.lang.reflect.Method;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import com.vaadin.shared.communication.MethodInvocation;
import com.vaadin.shared.communication.ServerRpc;
public class ServerRpcMethodInvocation extends MethodInvocation {
private static final Map invocationMethodCache = new ConcurrentHashMap(
128, 0.75f, 1);
private final Method method;
private final Class interfaceClass;
public ServerRpcMethodInvocation(String connectorId,
Class interfaceClass, String methodName,
int parameterCount) {
super(connectorId, interfaceClass.getName(), methodName);
assert ServerRpc.class.isAssignableFrom(interfaceClass);
this.interfaceClass = interfaceClass;
method = findInvocationMethod(interfaceClass, methodName,
parameterCount);
}
public Class getInterfaceClass() {
return interfaceClass;
}
public Method getMethod() {
return method;
}
/**
* Tries to find the method from the cache or alternatively by invoking
* {@link #doFindInvocationMethod(Class, String, int)} and updating the
* cache.
*
* @param targetType
* @param methodName
* @param parameterCount
* @return
*/
private Method findInvocationMethod(Class targetType, String methodName,
int parameterCount) {
// TODO currently only using method name and number of parameters as the
// signature
String signature = targetType.getName() + "." + methodName + "("
+ parameterCount;
Method invocationMethod = invocationMethodCache.get(signature);
if (invocationMethod == null) {
invocationMethod = doFindInvocationMethod(targetType, methodName,
parameterCount);
if (invocationMethod != null) {
invocationMethodCache.put(signature, invocationMethod);
}
}
if (invocationMethod == null) {
throw new IllegalStateException("Can't find method " + methodName
+ " with " + parameterCount + " parameters in "
+ targetType.getName());
}
return invocationMethod;
}
/**
* Tries to find the method from the class by looping through available
* methods.
*
* @param targetType
* @param methodName
* @param parameterCount
* @return
*/
private Method doFindInvocationMethod(Class targetType,
String methodName, int parameterCount) {
Method[] methods = targetType.getMethods();
for (Method method : methods) {
Class[] parameterTypes = method.getParameterTypes();
if (method.getName().equals(methodName)
&& parameterTypes.length == parameterCount) {
return method;
}
}
return null;
}
}