| /* |
| * 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. |
| */ |
| package org.jclouds.reflect; |
| |
| import static com.google.common.base.Objects.equal; |
| import static com.google.common.base.Preconditions.checkArgument; |
| import static com.google.common.base.Preconditions.checkNotNull; |
| |
| import java.util.List; |
| |
| import com.google.common.annotations.Beta; |
| import com.google.common.base.Objects; |
| import com.google.common.collect.ImmutableList; |
| import com.google.common.reflect.Invokable; |
| |
| /** |
| * Context needed to call {@link com.google.common.reflect.Invokable#invoke(Object, Object...)} |
| */ |
| @Beta |
| public final class Invocation { |
| |
| /** |
| * @param args |
| * as these represent parameters, can contain nulls |
| */ |
| public static Invocation create(Invokable<?, ?> invokable, List<Object> args) { |
| return new Invocation(invokable, args); |
| } |
| |
| /** |
| * invocation without arguments. |
| * |
| * @throws IllegalArgumentException |
| * if in invokable requires arguments |
| */ |
| public static Invocation create(Invokable<?, ?> invokable) { |
| checkArgument( |
| invokable.getParameters().isEmpty() || (invokable.getParameters().size() == 1 && invokable.isVarArgs()), |
| "please specify arguments to %s", invokable); |
| return create(invokable, ImmutableList.of()); |
| } |
| |
| private final Invokable<?, ?> invokable; |
| private final List<Object> args; |
| |
| private Invocation(Invokable<?, ?> invokable, List<Object> args) { |
| this.invokable = checkNotNull(invokable, "invokable"); |
| this.args = checkNotNull(args, "args"); |
| } |
| |
| /** |
| * what we can invoke |
| */ |
| public Invokable<?, ?> getInvokable() { |
| return invokable; |
| } |
| |
| /** |
| * arguments applied to {@link #getInvokable()} during {@link Invokable#invoke(Object, Object...)} |
| * |
| * @param args |
| * as these represent parameters, can contain nulls |
| */ |
| public List<Object> getArgs() { |
| return args; |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (this == o) |
| return true; |
| if (o == null || getClass() != o.getClass()) |
| return false; |
| Invocation that = Invocation.class.cast(o); |
| return equal(this.invokable, that.invokable) && equal(this.args, that.args); |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hashCode(invokable, args); |
| } |
| |
| @Override |
| public String toString() { |
| return String.format("%s%s", invokable, args); |
| } |
| } |