/*
* 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.spi.commons.query.qom;
/**
* <code>DefaultTraversingQOMTreeVisitor</code> default implementation of a
* traversing {@link QOMTreeVisitor}.
*/
public class DefaultTraversingQOMTreeVisitor extends DefaultQOMTreeVisitor {
/**
* Calls accept on each of the attached constraints of the AND node.
*/
public final Object visit(AndImpl node, Object data) throws Exception {
((ConstraintImpl) node.getConstraint1()).accept(this, data);
((ConstraintImpl) node.getConstraint2()).accept(this, data);
return data;
}
/**
* Calls accept on the two operands in the comparison node.
*/
public Object visit(ComparisonImpl node, Object data) throws Exception {
((DynamicOperandImpl) node.getOperand1()).accept(this, data);
((StaticOperandImpl) node.getOperand2()).accept(this, data);
return data;
}
/**
* Calls accept on the static operand in the fulltext search constraint.
*/
public Object visit(FullTextSearchImpl node, Object data) throws Exception {
((StaticOperandImpl) node.getFullTextSearchExpression()).accept(this, data);
return data;
}
/**
* Calls accept on the two sources and the join condition in the join node.
*/
public Object visit(JoinImpl node, Object data) throws Exception {
((SourceImpl) node.getRight()).accept(this, data);
((SourceImpl) node.getLeft()).accept(this, data);
((JoinConditionImpl) node.getJoinCondition()).accept(this, data);
return data;
}
/**
* Calls accept on the property value in the length node.
*/
public Object visit(LengthImpl node, Object data) throws Exception {
((PropertyValueImpl) node.getPropertyValue()).accept(this, data);
return data;
}
/**
* Calls accept on the dynamic operand in the lower-case node.
*/
public Object visit(LowerCaseImpl node, Object data) throws Exception {
((DynamicOperandImpl) node.getOperand()).accept(this, data);
return data;
}
/**
* Calls accept on the constraint in the NOT node.
*/
public Object visit(NotImpl node, Object data) throws Exception {
((ConstraintImpl) node.getConstraint()).accept(this, data);
return data;
}
/**
* Calls accept on the dynamic operand in the ordering node.
*/
public Object visit(OrderingImpl node, Object data) throws Exception {
((DynamicOperandImpl) node.getOperand()).accept(this, data);
return data;
}
/**
* Calls accept on each of the attached constraints of the OR node.
*/
public Object visit(OrImpl node, Object data) throws Exception {
((ConstraintImpl) node.getConstraint1()).accept(this, data);
((ConstraintImpl) node.getConstraint2()).accept(this, data);
return data;
}
/**
* Calls accept on the following contained QOM nodes:
* <ul>
* <li>Source</li>
* <li>Constraints</li>
* <li>Orderings</li>
* <li>Columns</li>
* </ul>
*/
public Object visit(QueryObjectModelTree node, Object data) throws Exception {
node.getSource().accept(this, data);
ConstraintImpl constraint = node.getConstraint();
if (constraint != null) {
constraint.accept(this, data);
}
OrderingImpl[] orderings = node.getOrderings();
for (int i = 0; i < orderings.length; i++) {
orderings[i].accept(this, data);
}
ColumnImpl[] columns = node.getColumns();
for (int i = 0; i < columns.length; i++) {
columns[i].accept(this, data);
}
return data;
}
/**
* Calls accept on the dynamic operand in the lower-case node.
*/
public Object visit(UpperCaseImpl node, Object data) throws Exception {
((DynamicOperandImpl) node.getOperand()).accept(this, data);
return data;
}
}