/*
* 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.jackrabbit.oak.query.ast;
import java.util.List;
import java.util.Set;
import javax.jcr.PropertyType;
import org.apache.jackrabbit.oak.api.PropertyValue;
import org.apache.jackrabbit.oak.query.index.FilterImpl;
import org.apache.jackrabbit.oak.spi.query.PropertyValues;
import static org.apache.jackrabbit.oak.api.Type.STRING;
/**
* The function "lower(..)".
*/
public class LowerCaseImpl extends DynamicOperandImpl {
private final DynamicOperandImpl operand;
public LowerCaseImpl(DynamicOperandImpl operand) {
this.operand = operand;
}
public DynamicOperandImpl getOperand() {
return operand;
}
@Override
boolean accept(AstVisitor v) {
return v.visit(this);
}
@Override
public String toString() {
return "lower(" + operand + ')';
}
@Override
public PropertyExistenceImpl getPropertyExistence() {
return operand.getPropertyExistence();
}
@Override
public Set<SelectorImpl> getSelectors() {
return operand.getSelectors();
}
@Override
public PropertyValue currentProperty() {
PropertyValue p = operand.currentProperty();
if (p == null) {
return null;
}
// TODO what is the expected result of LOWER(x) for an array property?
// currently throws an exception
String value = p.getValue(STRING);
// TODO toLowerCase(): document the Turkish locale problem
return PropertyValues.newString(value.toLowerCase());
}
@Override
public void restrict(FilterImpl f, Operator operator, PropertyValue v) {
// LOWER(x) implies x is not null
operand.restrict(f, Operator.NOT_EQUAL, null);
}
@Override
public void restrictList(FilterImpl f, List<PropertyValue> list) {
// "LOWER(x) IN (A, B)" implies x is not null
operand.restrict(f, Operator.NOT_EQUAL, null);
}
@Override
public boolean canRestrictSelector(SelectorImpl s) {
return operand.canRestrictSelector(s);
}
@Override
int getPropertyType() {
return PropertyType.STRING;
}
@Override
public DynamicOperandImpl createCopy() {
return new LowerCaseImpl(operand.createCopy());
}
}