/**
* 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.drill.exec.fn.impl.testing;
import java.util.Random;
import org.apache.drill.exec.ExecTest;
import org.apache.drill.exec.expr.DrillSimpleFunc;
import org.apache.drill.exec.expr.annotations.FunctionTemplate;
import org.apache.drill.exec.expr.annotations.FunctionTemplate.FunctionScope;
import org.apache.drill.exec.expr.annotations.Output;
import org.apache.drill.exec.expr.annotations.Param;
import org.apache.drill.exec.expr.annotations.Workspace;
import org.apache.drill.exec.expr.holders.BigIntHolder;
import org.apache.drill.exec.expr.holders.Float8Holder;
public class GeneratorFunctions extends ExecTest {
public static final Random random = new Random(1234L);
@FunctionTemplate(name = "increasingBigInt", isRandom = true,
scope = FunctionScope.SIMPLE, nulls = FunctionTemplate.NullHandling.NULL_IF_NULL)
public static class IncreasingBigInt implements DrillSimpleFunc {
@Param BigIntHolder start;
@Workspace long current;
@Output BigIntHolder out;
public void setup() {
current = 0;
}
public void eval() {
out.value = start.value + current++;
}
}
@FunctionTemplate(name = "randomBigInt", isRandom = true,
scope = FunctionScope.SIMPLE, nulls = FunctionTemplate.NullHandling.NULL_IF_NULL)
public static class RandomBigIntGauss implements DrillSimpleFunc {
@Param BigIntHolder range;
@Output BigIntHolder out;
public void setup() {
}
public void eval() {
out.value = (long)(org.apache.drill.exec.fn.impl.testing.GeneratorFunctions.random.nextGaussian() * range.value);
}
}
@FunctionTemplate(name = "randomBigInt", isRandom = true,
scope = FunctionScope.SIMPLE, nulls = FunctionTemplate.NullHandling.NULL_IF_NULL)
public static class RandomBigInt implements DrillSimpleFunc {
@Param BigIntHolder min;
@Param BigIntHolder max;
@Output BigIntHolder out;
public void setup() {
}
public void eval() {
out.value = (long)(org.apache.drill.exec.fn.impl.testing.GeneratorFunctions.random.nextFloat() * (max.value - min.value) + min.value);
}
}
@FunctionTemplate(name = "randomFloat8", isRandom = true,
scope = FunctionScope.SIMPLE, nulls = FunctionTemplate.NullHandling.NULL_IF_NULL)
public static class RandomFloat8Gauss implements DrillSimpleFunc {
@Param BigIntHolder range;
@Output
Float8Holder out;
public void setup() {
}
public void eval() {
out.value = org.apache.drill.exec.fn.impl.testing.GeneratorFunctions.random.nextGaussian() * range.value;
}
}
@FunctionTemplate(name = "randomFloat8", isRandom = true,
scope = FunctionScope.SIMPLE, nulls = FunctionTemplate.NullHandling.NULL_IF_NULL)
public static class RandomFloat8 implements DrillSimpleFunc {
@Param BigIntHolder min;
@Param BigIntHolder max;
@Output Float8Holder out;
public void setup() {
}
public void eval() {
out.value = org.apache.drill.exec.fn.impl.testing.GeneratorFunctions.random.nextFloat() * (max.value - min.value) + min.value;
}
}
}