org.apache.drill.common.expression.fn.BooleanFunctions.java Source code

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Here is the source code for org.apache.drill.common.expression.fn.BooleanFunctions.java

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 * 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
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 * 
 * http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.drill.common.expression.fn;

import com.fasterxml.jackson.databind.ser.std.StaticListSerializerBase;
import org.apache.drill.common.expression.ArgumentValidators.AllowedTypeList;
import org.apache.drill.common.expression.ArgumentValidators.ComparableArguments;
import org.apache.drill.common.expression.CallProvider;
import org.apache.drill.common.expression.FunctionDefinition;
import org.apache.drill.common.expression.OutputTypeDeterminer;
import org.apache.drill.common.expression.types.DataType;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.HashMap;
import java.util.Map;

public class BooleanFunctions implements CallProvider {
    static final Logger logger = LoggerFactory.getLogger(BooleanFunctions.class);

    @Override
    public FunctionDefinition[] getFunctionDefintions() {
        return new FunctionDefinition[] {
                FunctionDefinition.operator("or", new AllowedTypeList(2, Integer.MAX_VALUE, DataType.BOOLEAN),
                        OutputTypeDeterminer.FIXED_BOOLEAN, "or", "||"),
                FunctionDefinition.operator("and", new AllowedTypeList(2, Integer.MAX_VALUE, DataType.BOOLEAN),
                        OutputTypeDeterminer.FIXED_BOOLEAN, "and", "&&"),
                FunctionDefinition.operator("greater than", new ComparableArguments(2),
                        OutputTypeDeterminer.FIXED_BOOLEAN, ">"),
                FunctionDefinition.operator("less than", new ComparableArguments(2),
                        OutputTypeDeterminer.FIXED_BOOLEAN, "<"),
                FunctionDefinition.operator("equal", new ComparableArguments(2), OutputTypeDeterminer.FIXED_BOOLEAN,
                        "==", "<>"),
                FunctionDefinition.operator("greater than or equal to", new ComparableArguments(2),
                        OutputTypeDeterminer.FIXED_BOOLEAN, ">="),
                FunctionDefinition.operator("less than or equal to", new ComparableArguments(2),
                        OutputTypeDeterminer.FIXED_BOOLEAN, "<="), };

    }

    public static FunctionDefinition getFunctionDefintion(String name) {

        Map<String, Integer> funtionMap = new HashMap<String, Integer>();
        funtionMap.put("or", 0);
        funtionMap.put("and", 1);
        funtionMap.put("greater than", 2);
        funtionMap.put("less than", 3);
        funtionMap.put("equal", 4);
        funtionMap.put("greater than or equal to", 5);
        funtionMap.put("less than or equal to", 6);

        return new BooleanFunctions().getFunctionDefintions()[funtionMap.get(name)];
    }

}