| /* |
| * Copyright 2009-2010 by The Regents of the University of California |
| * Licensed 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 from |
| * |
| * 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 edu.uci.ics.hyracks.storage.am.common; |
| |
| import edu.uci.ics.hyracks.storage.am.common.datagen.ProbabilityHelper; |
| |
| |
| public class TestOperationSelector { |
| |
| public static enum TestOperation { |
| INSERT, |
| DELETE, |
| UPDATE, |
| UPSERT, |
| POINT_SEARCH, |
| RANGE_SEARCH, |
| SCAN, |
| DISKORDER_SCAN, |
| MERGE |
| } |
| |
| private final TestOperation[] ops; |
| private final int[] cumulIntRanges; |
| |
| public TestOperationSelector(TestOperation[] ops, double[] opProbs) { |
| sanityCheck(ops, opProbs); |
| this.ops = ops; |
| this.cumulIntRanges = ProbabilityHelper.getCumulIntRanges(opProbs); |
| } |
| |
| private void sanityCheck(TestOperation[] ops, double[] opProbs) { |
| if (ops.length == 0) { |
| throw new RuntimeException("Empty op array."); |
| } |
| if (opProbs.length == 0) { |
| throw new RuntimeException("Empty op probabilities."); |
| } |
| if (ops.length != opProbs.length) { |
| throw new RuntimeException("Ops and op probabilities have unequal length."); |
| } |
| float sum = 0.0f; |
| for (int i = 0; i < opProbs.length; i++) { |
| sum += opProbs[i]; |
| } |
| if (sum != 1.0f) { |
| throw new RuntimeException("Op probabilities don't add up to 1."); |
| } |
| } |
| |
| public TestOperation getOp(int randomInt) { |
| int ix = ProbabilityHelper.choose(cumulIntRanges, randomInt); |
| return ops[ix]; |
| } |
| } |