package org.apache.maven.shared.transfer.dependencies.collect.internal; | |
/* | |
* 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. | |
*/ | |
import org.apache.maven.shared.transfer.dependencies.collect.DependencyCollectorException; | |
import java.lang.reflect.InvocationTargetException; | |
/** | |
* Invokes method on objects using reflection. | |
*/ | |
final class Invoker | |
{ | |
private Invoker() | |
{ | |
// do not instantiate | |
} | |
public static <T> T invoke( Object object, String method ) throws DependencyCollectorException | |
{ | |
try | |
{ | |
@SuppressWarnings( "unchecked" ) | |
T invoke = (T) object.getClass().getMethod( method ).invoke( object ); | |
return invoke; | |
} | |
catch ( IllegalAccessException | InvocationTargetException | NoSuchMethodException e ) | |
{ | |
throw new DependencyCollectorException( e.getMessage(), e ); | |
} | |
} | |
public static <T> T invoke( Class<?> objectClazz, String staticMethod, Class<?> argClazz, Object arg ) | |
throws DependencyCollectorException | |
{ | |
try | |
{ | |
@SuppressWarnings( "unchecked" ) | |
T invoke = (T) objectClazz.getMethod( staticMethod, argClazz ).invoke( null, arg ); | |
return invoke; | |
} | |
catch ( IllegalAccessException | InvocationTargetException | NoSuchMethodException e ) | |
{ | |
throw new DependencyCollectorException( e.getMessage(), e ); | |
} | |
} | |
/** | |
* @param objectClazz the class of the static method | |
* @param staticMethod the static method to call | |
* @param argClasses the classes of the argument, used to select the right static method | |
* @param args the actual arguments to be passed | |
* @return the result of the method invocation | |
* @throws DependencyCollectorException if any checked exception occurs | |
*/ | |
public static <T> T invoke( Class<?> objectClazz, String staticMethod, Class<?>[] argClasses, Object[] args ) | |
throws DependencyCollectorException | |
{ | |
if ( args.length != argClasses.length ) | |
{ | |
throw new IllegalArgumentException( "The number of elements in argClasses and args are not the same." ); | |
} | |
try | |
{ | |
@SuppressWarnings( "unchecked" ) | |
T invoke = (T) objectClazz.getMethod( staticMethod, argClasses ).invoke( null, args ); | |
return invoke; | |
} | |
catch ( IllegalAccessException | InvocationTargetException | NoSuchMethodException e ) | |
{ | |
throw new DependencyCollectorException( e.getMessage(), e ); | |
} | |
} | |
} |