| /* |
| * 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 static com.google.common.base.Preconditions.checkNotNull; |
| |
| import org.apache.jackrabbit.oak.api.PropertyValue; |
| |
| /** |
| * A result column expression. |
| */ |
| public class ColumnImpl extends AstElement { |
| |
| private final String selectorName, propertyName, columnName; |
| private SelectorImpl selector; |
| |
| public ColumnImpl(String selectorName, String propertyName, String columnName) { |
| this.selectorName = checkNotNull(selectorName); |
| this.propertyName = checkNotNull(propertyName); |
| this.columnName = checkNotNull(columnName); |
| } |
| |
| public String getColumnName() { |
| return columnName; |
| } |
| |
| public String getPropertyName() { |
| return propertyName; |
| } |
| |
| @Override |
| boolean accept(AstVisitor v) { |
| return v.visit(this); |
| } |
| |
| @Override |
| public String toString() { |
| return quote(selectorName) + '.' + quote(propertyName) |
| + " as " + quote(columnName); |
| } |
| |
| public PropertyValue currentProperty() { |
| return selector.currentProperty(propertyName); |
| } |
| |
| public void bindSelector(SourceImpl source) { |
| selector = source.getExistingSelector(selectorName); |
| } |
| |
| public SelectorImpl getSelector() { |
| return selector; |
| } |
| |
| @Override |
| public AstElement copyOf() { |
| return new ColumnImpl(selectorName, propertyName, columnName); |
| } |
| } |