age.groovy

import io.crate.udf.UserDefinedScalarFunction
import io.crate.operation.aggregation.AggregationState
import io.crate.DataType
import io.crate.metadata.FunctionIdent
import io.crate.metadata.FunctionInfo
import io.crate.metadata.DynamicFunctionResolver
import io.crate.planner.symbol.Symbol
import io.crate.operation.Input
import java.util.Arrays
import java.lang.Long


class GroovyMathMin extends UserDefinedScalarFunction<Long, Long> {

    def String name() {
        return 'groovy_math_min'
    }

    def FunctionIdent ident() {
        return FunctionIdent(name(),
                             Arrays.asList(DataType.LONG, DataType.LONG))
    }

    def FunctionInfo info() {
        return FunctionInfo(ident(), DataType.LONG)
    }

    def Symbol normalizeSymbol(Symbol symbol) {
        return symbol
    }

    def DynamicFunctionResolver dynamicFunctionResolver() {
        return null
    }

    def Long evaluate(Input<Long> ... args) {
        return new Long([args[0].value(), args[1].value()].min())
    }
}