/* | |
* 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.ruta.condition; | |
import java.util.ArrayList; | |
import java.util.List; | |
import org.apache.uima.cas.FSIterator; | |
import org.apache.uima.cas.Type; | |
import org.apache.uima.cas.text.AnnotationFS; | |
import org.apache.uima.ruta.RutaStream; | |
import org.apache.uima.ruta.expression.bool.IBooleanExpression; | |
import org.apache.uima.ruta.expression.number.INumberExpression; | |
import org.apache.uima.ruta.expression.type.TypeExpression; | |
import org.apache.uima.ruta.rule.EvaluatedCondition; | |
import org.apache.uima.ruta.rule.MatchContext; | |
import org.apache.uima.ruta.rule.RuleElement; | |
import org.apache.uima.ruta.rule.RutaRuleElement; | |
import org.apache.uima.ruta.type.RutaBasic; | |
import org.apache.uima.ruta.visitor.InferenceCrowd; | |
public class PositionCondition extends TypeSentiveCondition { | |
private final INumberExpression position; | |
private final IBooleanExpression relative; | |
public PositionCondition(TypeExpression type, INumberExpression position, | |
IBooleanExpression relative) { | |
super(type); | |
this.position = position; | |
this.relative = relative; | |
} | |
@Override | |
public EvaluatedCondition eval(MatchContext context, RutaStream stream, InferenceCrowd crowd) { | |
AnnotationFS annotation = context.getAnnotation(); | |
RuleElement element = context.getElement(); | |
Type t = type.getType(context, stream); | |
RutaBasic beginAnchor = stream.getBeginAnchor(annotation.getBegin()); | |
RutaBasic endAnchor = stream.getEndAnchor(annotation.getEnd()); | |
if (beginAnchor == null || endAnchor == null || !beginAnchor.isPartOf(t) | |
|| !endAnchor.isPartOf(t)) { | |
return new EvaluatedCondition(this, false); | |
} | |
boolean relatively = relative == null ? true : relative.getBooleanValue(context, stream); | |
FSIterator<AnnotationFS> iterator = stream.getCas().getAnnotationIndex(t).iterator(beginAnchor); | |
if (!iterator.isValid()) { | |
iterator.moveToNext(); | |
} | |
if (!iterator.isValid()) { | |
iterator.moveToLast(); | |
} | |
AnnotationFS window = null; | |
while (iterator.isValid()) { | |
AnnotationFS annotationFS = iterator.get(); | |
if (annotationFS.getBegin() <= annotation.getBegin() | |
&& annotationFS.getEnd() >= annotation.getEnd()) { | |
window = annotationFS; | |
break; | |
} | |
iterator.moveToPrevious(); | |
} | |
List<Type> targetTypes = new ArrayList<Type>(); | |
if (element instanceof RutaRuleElement) { | |
RutaRuleElement re = (RutaRuleElement) element; | |
targetTypes.addAll(re.getMatcher().getTypes(element.getParent(), stream)); | |
} else { | |
targetTypes.add(annotation.getType()); | |
} | |
if (window == null) { | |
return new EvaluatedCondition(this, false); | |
} | |
int integerValue = position.getIntegerValue(context, stream); | |
if (relatively) { | |
int counter = 0; | |
List<RutaBasic> inWindow = stream.getBasicsInWindow(window); | |
for (RutaBasic each : inWindow) { | |
if (beginsWith(each, targetTypes)) { | |
counter++; | |
if (counter == integerValue) { | |
if (each.getBegin() == beginAnchor.getBegin()) { | |
return new EvaluatedCondition(this, true); | |
} else { | |
return new EvaluatedCondition(this, false); | |
} | |
} else if (counter > integerValue) { | |
return new EvaluatedCondition(this, false); | |
} | |
} | |
} | |
return new EvaluatedCondition(this, false); | |
} else { | |
int counter = 0; | |
List<RutaBasic> inWindow = stream.getBasicsInWindow(window); | |
for (RutaBasic each : inWindow) { | |
counter++; | |
boolean beginsWith = beginsWith(each, targetTypes); | |
if (each.getBegin() == beginAnchor.getBegin() && beginsWith && counter == integerValue) { | |
return new EvaluatedCondition(this, true); | |
} else if (counter > integerValue) { | |
return new EvaluatedCondition(this, false); | |
} | |
} | |
return new EvaluatedCondition(this, false); | |
} | |
} | |
private boolean beginsWith(RutaBasic each, List<Type> targetTypes) { | |
for (Type type : targetTypes) { | |
if (each.beginsWith(type)) { | |
return true; | |
} | |
} | |
return false; | |
} | |
public INumberExpression getPosition() { | |
return position; | |
} | |
public IBooleanExpression getRelative() { | |
return relative; | |
} | |
} |