content: /*
   * 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.calcite.piglet;
  
  import org.apache.calcite.schema.Function;
  import org.apache.calcite.sql.SqlFunctionCategory;
  import org.apache.calcite.sql.SqlIdentifier;
  import org.apache.calcite.sql.SqlKind;
  import org.apache.calcite.sql.SqlSyntax;
  import org.apache.calcite.sql.parser.SqlParserPos;
  import org.apache.calcite.sql.type.SqlOperandMetadata;
  import org.apache.calcite.sql.type.SqlOperandTypeInference;
  import org.apache.calcite.sql.type.SqlReturnTypeInference;
  import org.apache.calcite.sql.validate.SqlUserDefinedFunction;
  
  import org.apache.pig.FuncSpec;
  
  import com.google.common.collect.ImmutableList;
  
  /** Pig user-defined function. */
  public class PigUserDefinedFunction extends SqlUserDefinedFunction {
    public final FuncSpec funcSpec;
  
    private PigUserDefinedFunction(SqlIdentifier opName,
        SqlReturnTypeInference returnTypeInference,
        SqlOperandTypeInference operandTypeInference,
        SqlOperandMetadata operandMetadata,
        Function function,
        FuncSpec funcSpec) {
      super(opName, SqlKind.OTHER_FUNCTION, returnTypeInference,
          operandTypeInference, operandMetadata, function,
          SqlFunctionCategory.USER_DEFINED_CONSTRUCTOR, SqlSyntax.FUNCTION);
      this.funcSpec = funcSpec;
    }
  
    public PigUserDefinedFunction(String name,
        SqlReturnTypeInference returnTypeInference,
        SqlOperandMetadata operandMetadata, Function function,
        FuncSpec funcSpec) {
      this(new SqlIdentifier(ImmutableList.of(name), SqlParserPos.ZERO),
          returnTypeInference, null, operandMetadata, function, funcSpec);
    }
  
    public PigUserDefinedFunction(String name,
        SqlReturnTypeInference returnTypeInference,
        SqlOperandMetadata operandMetadata, Function function) {
      this(name, returnTypeInference, operandMetadata, function, null);
    }
  }
  