| /* |
| * 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.uima.cas.impl; |
| |
| import org.apache.uima.cas.CAS; |
| |
| /** |
| * Default implementation to compare two annotations. |
| * |
| * |
| * @version $Revision: 1.2 $ |
| */ |
| public class DefaultAnnotationComparator implements FSImplComparator { |
| |
| private final int startCode; |
| |
| private final int endCode; |
| |
| private final CASImpl cas; |
| |
| public DefaultAnnotationComparator(CASImpl cas) { |
| super(); |
| this.cas = cas; |
| this.startCode = ((FeatureImpl) cas.getTypeSystem().getFeatureByFullName( |
| CAS.FEATURE_BASE_NAME_BEGIN)).getCode(); |
| this.endCode = ((FeatureImpl) cas.getTypeSystem().getFeatureByFullName( |
| CAS.FEATURE_BASE_NAME_END)).getCode(); |
| } |
| |
| /** |
| * Compare two annotations. First compare by start position, where smaller start position means |
| * smaller annotation. If start positions are equal, compare by end position, where larger end |
| * position is smaller. Finally, compare by type code, arbitrarily. Does not compare feature |
| * values. |
| * |
| * @param addr1 |
| * Address of FS1. |
| * @param addr2 |
| * Address of FS2. |
| * @return <code>-1</code>, if FS1 is "smaller" than FS2; <code>1</code>, if FS2 is smaller |
| * than FS1; and <code>0</code>, if FS1 equals FS2. |
| */ |
| public int compare(int addr1, int addr2) { |
| if (addr1 == addr2) { |
| return 0; |
| } |
| int i1 = this.cas.getFeatureValue(addr1, this.startCode); |
| int i2 = this.cas.getFeatureValue(addr2, this.startCode); |
| if (i1 < i2) { |
| return -1; |
| } else if (i1 > i2) { |
| return 1; |
| } else { // Start positions are equal. |
| i1 = this.cas.getFeatureValue(addr1, this.endCode); |
| i2 = this.cas.getFeatureValue(addr2, this.endCode); |
| if (i1 > i2) { |
| return -1; |
| } else if (i2 > i1) { |
| return 1; |
| } else { // End positions are equal. |
| i1 = this.cas.getHeapValue(addr1); |
| i2 = this.cas.getHeapValue(addr2); |
| if (i1 < i2) { |
| return -1; |
| } else if (i2 < i1) { |
| return 1; |
| } else { // Types are equal. |
| return 0; |
| } |
| } |
| } |
| } |
| |
| } |