TryCastExpr.java

// 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.
// This file is copied from
// https://github.com/apache/impala/blob/branch-2.9.0/fe/src/main/java/org/apache/impala/CastExpr.java
// and modified by Doris

package org.apache.doris.analysis;

import org.apache.doris.catalog.Type;
import org.apache.doris.thrift.TExprNode;
import org.apache.doris.thrift.TExprNodeType;
import org.apache.doris.thrift.TExprOpcode;

public class TryCastExpr extends CastExpr {

    private boolean originCastNullable = false;

    public TryCastExpr(Type targetType, Expr e, boolean nullable, boolean originCastNullable) {
        super(targetType, e, nullable);
        this.opcode = TExprOpcode.TRY_CAST;
        this.originCastNullable = originCastNullable;
    }

    protected TryCastExpr(TryCastExpr other) {
        super(other);
        opcode = TExprOpcode.TRY_CAST;
        originCastNullable = other.originCastNullable;
    }

    @Override
    public Expr clone() {
        return new TryCastExpr(this);
    }

    @Override
    public <R, C> R accept(ExprVisitor<R, C> visitor, C context) {
        return visitor.visitTryCastExpr(this, context);
    }

    @Override
    protected void toThrift(TExprNode msg) {
        msg.node_type = TExprNodeType.TRY_CAST_EXPR;
        msg.setIsCastNullable(originCastNullable);
        msg.setOpcode(opcode);
    }
}