com.hazelcast.sql.impl.expression.string.ConcatFunction Maven / Gradle / Ivy
/*
* Copyright 2024 Hazelcast Inc.
*
* Licensed under the Hazelcast Community License (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://hazelcast.com/hazelcast-community-license
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.hazelcast.sql.impl.expression.string;
import com.hazelcast.jet.sql.impl.JetSqlSerializerHook;
import com.hazelcast.sql.impl.expression.BiExpression;
import com.hazelcast.sql.impl.expression.Expression;
import com.hazelcast.sql.impl.expression.ExpressionEvalContext;
import com.hazelcast.sql.impl.row.Row;
import com.hazelcast.sql.impl.type.QueryDataType;
import static com.hazelcast.sql.impl.expression.string.StringFunctionUtils.asVarchar;
/**
* A function which accepts a string, and return another string.
*/
public class ConcatFunction extends BiExpression {
public ConcatFunction() {
// No-op.
}
private ConcatFunction(Expression> first, Expression> second) {
super(first, second);
}
public static ConcatFunction create(Expression> first, Expression> second) {
return new ConcatFunction(first, second);
}
@Override
public String eval(Row row, ExpressionEvalContext context) {
String first = asVarchar(operand1, row, context);
String second = asVarchar(operand2, row, context);
return StringFunctionUtils.concat(first, second);
}
@Override
public QueryDataType getType() {
return QueryDataType.VARCHAR;
}
@Override
public int getClassId() {
return JetSqlSerializerHook.EXPRESSION_CONCAT;
}
}
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