| /* |
| * 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.Collections; |
| import java.util.List; |
| import java.util.Locale; |
| import java.util.Set; |
| |
| import javax.jcr.PropertyType; |
| |
| import org.apache.jackrabbit.oak.api.PropertyValue; |
| import org.apache.jackrabbit.oak.api.Type; |
| import org.apache.jackrabbit.oak.query.SQL2Parser; |
| import org.apache.jackrabbit.oak.query.index.FilterImpl; |
| import org.apache.jackrabbit.oak.spi.query.Filter.PathRestriction; |
| import org.apache.jackrabbit.oak.spi.query.QueryConstants; |
| import org.apache.jackrabbit.oak.spi.query.QueryIndex.OrderEntry; |
| |
| /** |
| * A property expression. |
| */ |
| public class PropertyValueImpl extends DynamicOperandImpl { |
| |
| private final String selectorName; |
| private final String propertyName; |
| private final int propertyType; |
| private SelectorImpl selector; |
| |
| public PropertyValueImpl(String selectorName, String propertyName) { |
| this(selectorName, propertyName, null); |
| } |
| |
| public PropertyValueImpl(String selectorName, String propertyName, String propertyType) { |
| this.selectorName = selectorName; |
| this.propertyName = propertyName; |
| this.propertyType = propertyType == null ? |
| PropertyType.UNDEFINED : |
| SQL2Parser.getPropertyTypeFromName(propertyType); |
| } |
| |
| public String getSelectorName() { |
| return selectorName; |
| } |
| |
| public String getPropertyName() { |
| return propertyName; |
| } |
| |
| @Override |
| boolean accept(AstVisitor v) { |
| return v.visit(this); |
| } |
| |
| @Override |
| public String toString() { |
| String s = quote(selectorName) + '.' + quote(propertyName); |
| if (propertyType != PropertyType.UNDEFINED) { |
| s = "property(" + s + ", '" + |
| PropertyType.nameFromValue(propertyType).toLowerCase(Locale.ENGLISH) + |
| "')"; |
| } |
| return s; |
| } |
| |
| @Override |
| public boolean supportsRangeConditions() { |
| // the jcr:path pseudo-property doesn't support LIKE conditions, |
| // because the path doesn't might be escaped, and possibly contain |
| // expressions that would result in incorrect results (/test[1] for example) |
| return !propertyName.equals(QueryConstants.JCR_PATH); |
| } |
| |
| @Override |
| public PropertyExistenceImpl getPropertyExistence() { |
| if (propertyName.equals("*")) { |
| return null; |
| } |
| return new PropertyExistenceImpl(selector, selectorName, propertyName); |
| } |
| |
| @Override |
| public Set<SelectorImpl> getSelectors() { |
| return Collections.singleton(selector); |
| } |
| |
| @Override |
| public PropertyValue currentProperty() { |
| PropertyValue p; |
| if (propertyType == PropertyType.UNDEFINED) { |
| p = selector.currentProperty(propertyName); |
| } else { |
| p = selector.currentProperty(propertyName, propertyType); |
| } |
| return p; |
| } |
| |
| public void bindSelector(SourceImpl source) { |
| selector = source.getExistingSelector(selectorName); |
| } |
| |
| @Override |
| public void restrict(FilterImpl f, Operator operator, PropertyValue v) { |
| if (f.getSelector().equals(selector)) { |
| String pn = normalizePropertyName(propertyName); |
| if (pn.equals(QueryConstants.JCR_PATH)) { |
| if (operator == Operator.EQUAL) { |
| f.restrictPath(v.getValue(Type.STRING), PathRestriction.EXACT); |
| } |
| } else { |
| if (operator == Operator.NOT_EQUAL && v != null) { |
| // "x <> 1" also means "x is not null" |
| f.restrictProperty(pn, Operator.NOT_EQUAL, null, propertyType); |
| } else { |
| f.restrictProperty(pn, operator, v, propertyType); |
| } |
| } |
| } |
| } |
| |
| @Override |
| public void restrictList(FilterImpl f, List<PropertyValue> list) { |
| if (f.getSelector().equals(selector)) { |
| String pn = normalizePropertyName(propertyName); |
| f.restrictPropertyAsList(pn, list); |
| } |
| } |
| |
| @Override |
| public String getFunction(SelectorImpl s) { |
| if (!s.equals(selector)) { |
| return null; |
| } |
| String pn = normalizePropertyName(propertyName); |
| return "@" + pn; |
| } |
| |
| @Override |
| public boolean canRestrictSelector(SelectorImpl s) { |
| return s.equals(selector); |
| } |
| |
| @Override |
| int getPropertyType() { |
| return propertyType; |
| } |
| |
| @Override |
| public PropertyValueImpl createCopy() { |
| return new PropertyValueImpl(selectorName, propertyName); |
| } |
| |
| @Override |
| public OrderEntry getOrderEntry(SelectorImpl s, OrderingImpl o) { |
| if (!s.equals(selector)) { |
| // ordered by a different selector |
| return null; |
| } |
| String pn = normalizePropertyName(propertyName); |
| return new OrderEntry( |
| pn, |
| Type.UNDEFINED, |
| o.isDescending() ? |
| OrderEntry.Order.DESCENDING : OrderEntry.Order.ASCENDING); |
| } |
| |
| } |