| /* |
| * 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.apache.commons.functor.adapter; |
| |
| import java.io.Serializable; |
| |
| import org.apache.commons.functor.BinaryProcedure; |
| import org.apache.commons.functor.NullaryProcedure; |
| import org.apache.commons.lang3.Validate; |
| |
| /** |
| * Adapts a |
| * {@link BinaryProcedure BinaryProcedure} |
| * to the |
| * {@link NullaryProcedure NullaryProcedure} interface |
| * using a constant left-side argument. |
| * <p/> |
| * Note that although this class implements |
| * {@link Serializable}, a given instance will |
| * only be truly <code>Serializable</code> if the |
| * underlying objects are. Attempts to serialize |
| * an instance whose delegates are not |
| * <code>Serializable</code> will result in an exception. |
| * |
| * @version $Revision: 1365377 $ $Date: 2012-07-24 21:59:23 -0300 (Tue, 24 Jul 2012) $ |
| */ |
| public final class FullyBoundNullaryProcedure implements NullaryProcedure, Serializable { |
| /** |
| * serialVersionUID declaration. |
| */ |
| private static final long serialVersionUID = -904891610081737737L; |
| /** The {@link BinaryProcedure BinaryProcedure} I'm wrapping. */ |
| private final BinaryProcedure<Object, Object> procedure; |
| /** The left parameter to pass to {@code procedure}. */ |
| private final Object left; |
| /** The right parameter to pass to {@code procedure}. */ |
| private final Object right; |
| |
| /** |
| * Create a new FullyBoundNullaryProcedure instance. |
| * @param <L> left type |
| * @param <R> right type |
| * @param procedure the procedure to adapt |
| * @param left the left argument to use |
| * @param right the right argument to use |
| */ |
| @SuppressWarnings("unchecked") |
| public <L, R> FullyBoundNullaryProcedure(BinaryProcedure<? super L, ? super R> procedure, L left, R right) { |
| this.procedure = |
| (BinaryProcedure<Object, Object>) Validate.notNull(procedure, |
| "BinaryProcedure argument was null"); |
| this.left = left; |
| this.right = right; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public void run() { |
| procedure.run(left, right); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public boolean equals(Object obj) { |
| if (obj == this) { |
| return true; |
| } |
| if (!(obj instanceof FullyBoundNullaryProcedure)) { |
| return false; |
| } |
| FullyBoundNullaryProcedure that = (FullyBoundNullaryProcedure) obj; |
| return procedure.equals(that.procedure) |
| && (null == left ? null == that.left : left.equals(that.left)) |
| && (null == right ? null == that.right : right.equals(that.right)); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public int hashCode() { |
| int hash = "FullyBoundNullaryProcedure".hashCode(); |
| hash <<= 2; |
| hash ^= procedure.hashCode(); |
| hash <<= 2; |
| if (null != left) { |
| hash ^= left.hashCode(); |
| } |
| hash <<= 2; |
| if (null != right) { |
| hash ^= right.hashCode(); |
| } |
| return hash; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public String toString() { |
| return "FullyBoundNullaryProcedure<" + procedure + "(" + left + ", " + right + ")>"; |
| } |
| |
| /** |
| * Adapt a BinaryNullaryProcedure to the NullaryProcedure interface. |
| * @param <L> left type |
| * @param <R> right type |
| * @param procedure to adapt |
| * @param left left side argument |
| * @param right right side argument |
| * @return FullyBoundNullaryProcedure |
| */ |
| public static <L, R> FullyBoundNullaryProcedure bind( |
| BinaryProcedure<? super L, ? super R> procedure, L left, R right) { |
| return null == procedure ? null : new FullyBoundNullaryProcedure(procedure, left, right); |
| } |
| |
| } |