| /* |
| * 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.myfaces.tobago.util; |
| |
| import java.text.CollationKey; |
| import java.text.Collator; |
| import java.util.Comparator; |
| |
| |
| public abstract class ComparatorBase implements Comparator { |
| |
| private Comparator comparator; |
| |
| private boolean reverse; |
| |
| protected ComparatorBase() { |
| } |
| |
| protected ComparatorBase(final boolean reverse, final Comparator comparator) { |
| this.comparator = comparator; |
| this.reverse = reverse; |
| } |
| |
| protected ComparatorBase(final boolean reverse) { |
| this.reverse = reverse; |
| } |
| |
| protected ComparatorBase(final Comparator comparator) { |
| this.comparator = comparator; |
| } |
| |
| protected int internalCompare(final Object obj1, final Object obj2) { |
| |
| final int result; |
| if (obj1 == null || obj2 == null) { |
| if (obj1 == null && obj2 == null) { |
| result = 0; |
| } else { |
| if (obj1 == null) { |
| result = 1; |
| } else { |
| result = -1; |
| } |
| } |
| } else if (!obj1.getClass().isInstance(obj2)) { |
| throw new ClassCastException(obj1.getClass().getName() + " != " + obj2.getClass().getName()); |
| } else { |
| if (comparator instanceof Collator) { |
| final CollationKey collationKey1 |
| = ((Collator) comparator).getCollationKey(obj1.toString()); |
| final CollationKey collationKey2 |
| = ((Collator) comparator).getCollationKey(obj2.toString()); |
| result = collationKey1.compareTo(collationKey2); |
| } else if (comparator != null) { |
| result = comparator.compare(obj1, obj2); |
| } else { |
| if (obj1 instanceof String) { |
| result = ((String) obj1).compareToIgnoreCase((String) obj2); |
| } else if (obj1 instanceof Comparable) { |
| result = ((Comparable) obj1).compareTo(obj2); |
| } else { |
| result = obj1.toString().compareTo(obj2.toString()); |
| } |
| } |
| } |
| return reverse ? -result : result; |
| } |
| |
| public boolean equals(Object o) { |
| if (this == o) { |
| return true; |
| } |
| if (o == null || getClass() != o.getClass()) { |
| return false; |
| } |
| |
| final ComparatorBase that = (ComparatorBase) o; |
| |
| return comparator != null ? comparator.equals(that.comparator) : that.comparator == null; |
| |
| } |
| |
| public int hashCode() { |
| return comparator != null ? comparator.hashCode() : 0; |
| } |
| |
| public Comparator getComparator() { |
| return comparator; |
| } |
| } |