/*
* 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.analyze;
import io.crate.sql.ExpressionFormatter;
import io.crate.sql.tree.ArrayComparisonExpression;
import io.crate.sql.tree.Expression;
import io.crate.sql.tree.QualifiedNameReference;
import io.crate.sql.tree.SubscriptExpression;
import java.util.List;
import java.util.NoSuchElementException;
public class OutputNameFormatter {
private final static InnerOutputNameFormatter INSTANCE = new InnerOutputNameFormatter();
public static String format(Expression expression) {
return INSTANCE.process(expression, null);
}
private static class InnerOutputNameFormatter extends ExpressionFormatter.Formatter {
@Override
protected String visitQualifiedNameReference(QualifiedNameReference node, Void context) {
List<String> parts = node.getName().getParts();
if (parts.isEmpty()) {
throw new NoSuchElementException("Parts of QualifiedNameReference are empty: " + node.getName());
}
return parts.get(parts.size() - 1);
}
@Override
protected String visitSubscriptExpression(SubscriptExpression node, Void context) {
return process(node.name(), null) + '[' + process(node.index(), null) + ']';
}
@Override
public String visitArrayComparisonExpression(ArrayComparisonExpression node, Void context) {
return process(node.getLeft(), null) + ' ' +
node.getType().getValue() + ' ' +
node.quantifier().name() + '(' +
process(node.getRight(), null) + ')';
}
}
}