| // Copyright (C) 2009 The Android Open Source Project |
| // |
| // 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 com.google.gerrit.server.query; |
| |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.List; |
| |
| /** Requires one predicate to be true. */ |
| public final class OrPredicate extends Predicate { |
| private final Predicate[] children; |
| |
| public OrPredicate(final Predicate... that) { |
| this(Arrays.asList(that)); |
| } |
| |
| public OrPredicate(final Collection<Predicate> that) { |
| final ArrayList<Predicate> tmp = new ArrayList<Predicate>(that.size()); |
| for (Predicate p : that) { |
| if (p instanceof OrPredicate) { |
| tmp.addAll(p.getChildren()); |
| } else { |
| tmp.add(p); |
| } |
| } |
| if (tmp.size() < 2) { |
| throw new IllegalArgumentException("Need at least two predicates"); |
| } |
| children = new Predicate[tmp.size()]; |
| tmp.toArray(children); |
| } |
| |
| @Override |
| public List<Predicate> getChildren() { |
| return Collections.unmodifiableList(Arrays.asList(children)); |
| } |
| |
| @Override |
| public int getChildCount() { |
| return children.length; |
| } |
| |
| @Override |
| public Predicate getChild(final int i) { |
| return children[i]; |
| } |
| |
| @Override |
| public int hashCode() { |
| return children[0].hashCode() * 31 + children[1].hashCode(); |
| } |
| |
| @Override |
| public boolean equals(final Object other) { |
| return other instanceof OrPredicate |
| && getChildren().equals(((OrPredicate) other).getChildren()); |
| } |
| |
| @Override |
| public String toString() { |
| final StringBuilder r = new StringBuilder(); |
| r.append("("); |
| for (int i = 0; i < children.length; i++) { |
| if (i != 0) { |
| r.append(" OR "); |
| } |
| r.append(children[i]); |
| } |
| r.append(")"); |
| return r.toString(); |
| } |
| } |