org.jboss.ejb.client.EJBMethodLocator Maven / Gradle / Ivy
Go to download
This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
/*
* JBoss, Home of Professional Open Source.
* Copyright 2017 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* 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 org.jboss.ejb.client;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.Serializable;
import java.lang.reflect.Method;
import java.util.Arrays;
import org.jboss.marshalling.FieldSetter;
import org.wildfly.common.Assert;
/**
* A locator for a specific Enterprise Bean method.
*
* @author David M. Lloyd
*/
public final class EJBMethodLocator implements Serializable {
private static final long serialVersionUID = -1387266421025030533L;
private final String methodName;
private final String[] parameterTypeNames;
private final transient int hashCode;
private static final FieldSetter hashCodeSetter = FieldSetter.get(EJBMethodLocator.class, "hashCode");
/**
* Construct a new instance.
*
* @param methodName the method name (must not be {@code null})
* @param parameterTypeNames the parameter type names array (may be empty, must not be {@code null} nor contain {@code null} elements)
*/
public EJBMethodLocator(final String methodName, final String... parameterTypeNames) {
this(methodName, parameterTypeNames, true);
}
private EJBMethodLocator(final String methodName, final String[] parameterTypeNames, boolean copy) {
Assert.checkNotNullParam("methodName", methodName);
Assert.checkNotNullParam("parameterTypeNames", parameterTypeNames);
this.methodName = methodName;
final int length = parameterTypeNames.length;
String[] clone = this.parameterTypeNames = copy && length > 0 ? parameterTypeNames.clone() : parameterTypeNames;
for (int i = 0; i < length; i++) {
Assert.checkNotNullArrayParam("parameterTypeNames", i, clone[i]);
}
hashCode = calcHashCode(methodName, parameterTypeNames);
}
/**
* Get a method locator for the given reflection method.
*
* @param method the reflection method (must not be {@code null})
* @return the method locator (not {@code null})
*/
public static EJBMethodLocator forMethod(final Method method) {
Assert.checkNotNullParam("method", method);
final String name = method.getName();
final Class[] parameterTypes = method.getParameterTypes();
final int length = parameterTypes.length;
final String[] paramNames = new String[length];
for (int i = 0; i < length; i ++) {
paramNames[i] = parameterTypes[i].getName();
}
return new EJBMethodLocator(name, paramNames, false);
}
private static int calcHashCode(final String methodName, final String[] parameterTypeNames) {
return methodName.hashCode() + 13 * Arrays.hashCode(parameterTypeNames);
}
/**
* Get the method name.
*
* @return the method name (not {@code null})
*/
public String getMethodName() {
return methodName;
}
/**
* Get the parameter count.
*
* @return the parameter count
*/
public int getParameterCount() {
return parameterTypeNames.length;
}
/**
* Get the name of the parameter at the given index.
*
* @return the name of the parameter at the given index
*/
public String getParameterTypeName(int index) {
return parameterTypeNames[index];
}
private void readObject(ObjectInputStream ois) throws IOException, ClassNotFoundException {
ois.defaultReadObject();
Assert.checkNotNullParam("methodName", methodName);
Assert.checkNotNullParam("parameterTypeNames", parameterTypeNames);
for (int i = 0; i < parameterTypeNames.length; i++) {
Assert.checkNotNullArrayParam("parameterTypeNames", i, parameterTypeNames[i]);
}
hashCodeSetter.setInt(this, calcHashCode(methodName, parameterTypeNames));
}
/**
* Determine whether this object is equal to another.
*
* @param other the other object
* @return {@code true} if they are equal, {@code false} otherwise
*/
public boolean equals(Object other) {
return other instanceof EJBMethodLocator && equals((EJBMethodLocator)other);
}
/**
* Determine whether this object is equal to another.
*
* @param other the other object
* @return {@code true} if they are equal, {@code false} otherwise
*/
public boolean equals(EJBMethodLocator other) {
return this == other || other != null && hashCode == other.hashCode && methodName.equals(other.methodName) && Arrays.equals(parameterTypeNames, other.parameterTypeNames);
}
/**
* Get the hash code.
*
* @return the hash code
*/
public int hashCode() {
return hashCode;
}
@Override
public String toString() {
final StringBuffer buffer = new StringBuffer();
buffer.append("EJBMethodLocator(method=");
buffer.append(methodName);
buffer.append(", parameters=(");
for (String parameterTypeName : parameterTypeNames) {
buffer.append(parameterTypeName);
buffer.append(' ');
}
buffer.append("))");
return buffer.toString();
}
}