1 /** 2 * Copyright (C) 2006 Google Inc. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.google.inject.matcher; 18 19 import java.io.Serializable; 20 21 /** 22 * Implements {@code and()} and {@code or()}. 23 * 24 * @author crazybob@google.com (Bob Lee) 25 */ 26 public abstract class AbstractMatcher<T> implements Matcher<T> { 27 and(final Matcher<? super T> other)28 public Matcher<T> and(final Matcher<? super T> other) { 29 return new AndMatcher<T>(this, other); 30 } 31 or(Matcher<? super T> other)32 public Matcher<T> or(Matcher<? super T> other) { 33 return new OrMatcher<T>(this, other); 34 } 35 36 private static class AndMatcher<T> extends AbstractMatcher<T> implements Serializable { 37 private final Matcher<? super T> a, b; 38 AndMatcher(Matcher<? super T> a, Matcher<? super T> b)39 public AndMatcher(Matcher<? super T> a, Matcher<? super T> b) { 40 this.a = a; 41 this.b = b; 42 } 43 matches(T t)44 public boolean matches(T t) { 45 return a.matches(t) && b.matches(t); 46 } 47 equals(Object other)48 @Override public boolean equals(Object other) { 49 return other instanceof AndMatcher 50 && ((AndMatcher) other).a.equals(a) 51 && ((AndMatcher) other).b.equals(b); 52 } 53 hashCode()54 @Override public int hashCode() { 55 return 41 * (a.hashCode() ^ b.hashCode()); 56 } 57 toString()58 @Override public String toString() { 59 return "and(" + a + ", " + b + ")"; 60 } 61 62 private static final long serialVersionUID = 0; 63 } 64 65 private static class OrMatcher<T> extends AbstractMatcher<T> implements Serializable { 66 private final Matcher<? super T> a, b; 67 OrMatcher(Matcher<? super T> a, Matcher<? super T> b)68 public OrMatcher(Matcher<? super T> a, Matcher<? super T> b) { 69 this.a = a; 70 this.b = b; 71 } 72 matches(T t)73 public boolean matches(T t) { 74 return a.matches(t) || b.matches(t); 75 } 76 equals(Object other)77 @Override public boolean equals(Object other) { 78 return other instanceof OrMatcher 79 && ((OrMatcher) other).a.equals(a) 80 && ((OrMatcher) other).b.equals(b); 81 } 82 hashCode()83 @Override public int hashCode() { 84 return 37 * (a.hashCode() ^ b.hashCode()); 85 } 86 toString()87 @Override public String toString() { 88 return "or(" + a + ", " + b + ")"; 89 } 90 91 private static final long serialVersionUID = 0; 92 } 93 } 94