/**
* 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.drill.common.expression;
import java.util.Collections;
import java.util.Iterator;
import org.apache.drill.common.expression.visitors.ExprVisitor;
import org.apache.drill.common.types.TypeProtos.MajorType;
import static com.google.common.base.Preconditions.checkNotNull;
public class CastExpression extends LogicalExpressionBase implements Iterable<LogicalExpression>{
static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(CastExpression.class);
private final LogicalExpression input;
private final MajorType type;
public CastExpression(LogicalExpression input, MajorType type, ExpressionPosition pos) {
super(pos);
this.input = input;
this.type = checkNotNull(type, "Major type cannot be null");
}
@Override
public <T, V, E extends Exception> T accept(ExprVisitor<T, V, E> visitor, V value) throws E {
return visitor.visitCastExpression(this, value);
}
@Override
public Iterator<LogicalExpression> iterator() {
return Collections.singleton(input).iterator();
}
public LogicalExpression getInput() {
return input;
}
@Override
public MajorType getMajorType() {
return type;
}
@Override
public String toString() {
return "CastExpression [input=" + input + ", type=" + type + "]";
}
}