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/*
 * 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 com.hazelcast.org.apache.calcite.sql.validate;

import com.hazelcast.org.apache.calcite.rel.type.RelDataType;
import com.hazelcast.org.apache.calcite.schema.Function;
import com.hazelcast.org.apache.calcite.schema.FunctionParameter;
import com.hazelcast.org.apache.calcite.sql.SqlFunction;
import com.hazelcast.org.apache.calcite.sql.SqlFunctionCategory;
import com.hazelcast.org.apache.calcite.sql.SqlIdentifier;
import com.hazelcast.org.apache.calcite.sql.SqlKind;
import com.hazelcast.org.apache.calcite.sql.type.SqlOperandMetadata;
import com.hazelcast.org.apache.calcite.sql.type.SqlOperandTypeChecker;
import com.hazelcast.org.apache.calcite.sql.type.SqlOperandTypeInference;
import com.hazelcast.org.apache.calcite.sql.type.SqlReturnTypeInference;
import com.hazelcast.org.apache.calcite.util.Util;

import com.hazelcast.org.checkerframework.checker.nullness.qual.Nullable;

import java.util.List;

/**
* User-defined scalar function.
 *
 * 

Created by the validator, after resolving a function call to a function * defined in a Calcite schema.

*/ public class SqlUserDefinedFunction extends SqlFunction { public final Function function; @Deprecated // to be removed before 2.0 public SqlUserDefinedFunction(SqlIdentifier opName, SqlReturnTypeInference returnTypeInference, SqlOperandTypeInference operandTypeInference, @Nullable SqlOperandTypeChecker operandTypeChecker, List paramTypes, Function function) { this(opName, SqlKind.OTHER_FUNCTION, returnTypeInference, operandTypeInference, operandTypeChecker instanceof SqlOperandMetadata ? (SqlOperandMetadata) operandTypeChecker : null, function); Util.discard(paramTypes); // no longer used } /** Creates a {@link SqlUserDefinedFunction}. */ public SqlUserDefinedFunction(SqlIdentifier opName, SqlKind kind, SqlReturnTypeInference returnTypeInference, SqlOperandTypeInference operandTypeInference, @Nullable SqlOperandMetadata operandMetadata, Function function) { this(opName, kind, returnTypeInference, operandTypeInference, operandMetadata, function, SqlFunctionCategory.USER_DEFINED_FUNCTION); } /** Constructor used internally and by derived classes. */ protected SqlUserDefinedFunction(SqlIdentifier opName, SqlKind kind, SqlReturnTypeInference returnTypeInference, SqlOperandTypeInference operandTypeInference, @Nullable SqlOperandMetadata operandMetadata, Function function, SqlFunctionCategory category) { super(Util.last(opName.names), opName, kind, returnTypeInference, operandTypeInference, operandMetadata, category); this.function = function; } @Override public @Nullable SqlOperandMetadata getOperandTypeChecker() { return (@Nullable SqlOperandMetadata) super.getOperandTypeChecker(); } /** * Returns function that implements given operator call. * @return function that implements given operator call */ public Function getFunction() { return function; } @SuppressWarnings("deprecation") @Override public List getParamNames() { return Util.transform(function.getParameters(), FunctionParameter::getName); } }




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