/*
* Licensed to CRATE Technology GmbH ("Crate") under one or more contributor
* license agreements. See the NOTICE file distributed with this work for
* additional information regarding copyright ownership. Crate 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.
*
* However, if you have executed another commercial license agreement
* with Crate these terms will supersede the license and you may use the
* software solely pursuant to the terms of the relevant commercial agreement.
*/
package io.crate.sql.tree;
public abstract class DefaultTraversalVisitor<R, C>
extends AstVisitor<R, C> {
@Override
protected R visitExtract(Extract node, C context) {
return process(node.getExpression(), context);
}
@Override
protected R visitCast(Cast node, C context) {
return process(node.getExpression(), context);
}
@Override
protected R visitTryCast(TryCast node, C context) {
return process(node.getExpression(), context);
}
@Override
protected R visitArithmeticExpression(ArithmeticExpression node, C context) {
process(node.getLeft(), context);
process(node.getRight(), context);
return null;
}
@Override
protected R visitBetweenPredicate(BetweenPredicate node, C context) {
process(node.getValue(), context);
process(node.getMin(), context);
process(node.getMax(), context);
return null;
}
@Override
protected R visitComparisonExpression(ComparisonExpression node, C context) {
process(node.getLeft(), context);
process(node.getRight(), context);
return null;
}
@Override
protected R visitQuery(Query node, C context) {
if (node.getWith().isPresent()) {
process(node.getWith().get(), context);
}
process(node.getQueryBody(), context);
for (SortItem sortItem : node.getOrderBy()) {
process(sortItem, context);
}
return null;
}
@Override
protected R visitWith(With node, C context) {
for (WithQuery query : node.getQueries()) {
process(query, context);
}
return null;
}
@Override
protected R visitWithQuery(WithQuery node, C context) {
return process(node.getQuery(), context);
}
@Override
protected R visitSelect(Select node, C context) {
for (SelectItem item : node.getSelectItems()) {
process(item, context);
}
return null;
}
@Override
protected R visitSingleColumn(SingleColumn node, C context) {
process(node.getExpression(), context);
return null;
}
@Override
protected R visitWhenClause(WhenClause node, C context) {
process(node.getOperand(), context);
process(node.getResult(), context);
return null;
}
@Override
protected R visitInPredicate(InPredicate node, C context) {
process(node.getValue(), context);
process(node.getValueList(), context);
return null;
}
@Override
protected R visitFunctionCall(FunctionCall node, C context) {
for (Expression argument : node.getArguments()) {
process(argument, context);
}
return null;
}
@Override
protected R visitSimpleCaseExpression(SimpleCaseExpression node, C context) {
process(node.getOperand(), context);
for (WhenClause clause : node.getWhenClauses()) {
process(clause, context);
}
if (node.getDefaultValue() != null) {
process(node.getDefaultValue(), context);
}
return null;
}
@Override
protected R visitInListExpression(InListExpression node, C context) {
for (Expression value : node.getValues()) {
process(value, context);
}
return null;
}
@Override
protected R visitIfExpression(IfExpression node, C context) {
process(node.getCondition(), context);
process(node.getTrueValue(), context);
if (node.getFalseValue().isPresent()) {
process(node.getFalseValue().get(), context);
}
return null;
}
@Override
protected R visitNegativeExpression(NegativeExpression node, C context) {
return process(node.getValue(), context);
}
@Override
protected R visitNotExpression(NotExpression node, C context) {
return process(node.getValue(), context);
}
@Override
protected R visitSearchedCaseExpression(SearchedCaseExpression node, C context) {
for (WhenClause clause : node.getWhenClauses()) {
process(clause, context);
}
if (node.getDefaultValue() != null) {
process(node.getDefaultValue(), context);
}
return null;
}
@Override
protected R visitLikePredicate(LikePredicate node, C context) {
process(node.getValue(), context);
process(node.getPattern(), context);
if (node.getEscape() != null) {
process(node.getEscape(), context);
}
return null;
}
@Override
protected R visitIsNotNullPredicate(IsNotNullPredicate node, C context) {
return process(node.getValue(), context);
}
@Override
protected R visitIsNullPredicate(IsNullPredicate node, C context) {
return process(node.getValue(), context);
}
@Override
protected R visitLogicalBinaryExpression(LogicalBinaryExpression node, C context) {
process(node.getLeft(), context);
process(node.getRight(), context);
return null;
}
@Override
protected R visitSubqueryExpression(SubqueryExpression node, C context) {
return process(node.getQuery(), context);
}
@Override
protected R visitSortItem(SortItem node, C context) {
return process(node.getSortKey(), context);
}
@Override
protected R visitQuerySpecification(QuerySpecification node, C context) {
// visit the from first, since this qualifies the select
if (node.getFrom() != null) {
for (Relation relation : node.getFrom()) {
process(relation, context);
}
}
process(node.getSelect(), context);
if (node.getWhere().isPresent()) {
process(node.getWhere().get(), context);
}
for (Expression expression : node.getGroupBy()) {
process(expression, context);
}
if (node.getHaving().isPresent()) {
process(node.getHaving().get(), context);
}
for (SortItem sortItem : node.getOrderBy()) {
process(sortItem, context);
}
return null;
}
@Override
protected R visitUnion(Union node, C context) {
for (Relation relation : node.getRelations()) {
process(relation, context);
}
return null;
}
@Override
protected R visitIntersect(Intersect node, C context) {
for (Relation relation : node.getRelations()) {
process(relation, context);
}
return null;
}
@Override
protected R visitExcept(Except node, C context) {
process(node.getLeft(), context);
process(node.getRight(), context);
return null;
}
@Override
protected R visitTableSubquery(TableSubquery node, C context) {
return process(node.getQuery(), context);
}
@Override
protected R visitAliasedRelation(AliasedRelation node, C context) {
return process(node.getRelation(), context);
}
@Override
protected R visitJoin(Join node, C context) {
process(node.getLeft(), context);
process(node.getRight(), context);
if (node.getCriteria().isPresent() && node.getCriteria().get() instanceof JoinOn) {
process(((JoinOn) node.getCriteria().get()).getExpression(), context);
}
return null;
}
@Override
public R visitInsertFromValues(InsertFromValues node, C context) {
process(node.table(), context);
for (ValuesList valuesList : node.valuesLists()) {
process(valuesList, context);
}
return null;
}
@Override
public R visitValuesList(ValuesList node, C context) {
for (Expression value : node.values()) {
process(value, context);
}
return null;
}
@Override
public R visitUpdate(Update node, C context) {
process(node.relation(), context);
for (Assignment assignment : node.assignements()) {
process(assignment, context);
}
if (node.whereClause().isPresent()) {
process(node.whereClause().get(), context);
}
return null;
}
@Override
public R visitDelete(Delete node, C context) {
process(node.getRelation(), context);
return null;
}
@Override
public R visitCopyFrom(CopyFrom node, C context) {
process(node.table(), context);
return null;
}
@Override
public R visitCopyTo(CopyTo node, C context) {
process(node.table(), context);
return null;
}
@Override
public R visitAlterTable(AlterTable node, C context) {
process(node.table(), context);
return null;
}
@Override
public R visitInsertFromSubquery(InsertFromSubquery node, C context) {
process(node.table(), context);
process(node.subQuery(), context);
return null;
}
@Override
public R visitDropTable(DropTable node, C context) {
process(node.table(), context);
return super.visitDropTable(node, context);
}
@Override
public R visitCreateTable(CreateTable node, C context) {
process(node.name(), context);
return null;
}
@Override
public R visitShowCreateTable(ShowCreateTable node, C context) {
process(node.table(), context);
return null;
}
@Override
public R visitRefreshStatement(RefreshStatement node, C context) {
for (Table nodeTable : node.tables()) {
process(nodeTable, context);
}
return null;
}
@Override
public R visitMatchPredicate(MatchPredicate node, C context) {
for (MatchPredicateColumnIdent columnIdent : node.idents()) {
process(columnIdent.columnIdent(), context);
process(columnIdent.boost(), context);
}
process(node.value(), context);
return null;
}
}