MarcosZyk commented on code in PR #8607: URL: https://github.com/apache/iotdb/pull/8607#discussion_r1057517724
########## node-commons/src/test/java/org/apache/iotdb/commons/path/PatternDFATest.java: ########## @@ -0,0 +1,129 @@ +/* + * 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.iotdb.commons.path; + +import org.apache.iotdb.commons.exception.IllegalPathException; +import org.apache.iotdb.commons.path.fa.IFAState; +import org.apache.iotdb.commons.path.fa.IFATransition; +import org.apache.iotdb.commons.path.fa.IPatternFA; +import org.apache.iotdb.commons.path.fa.dfa.PatternDFA; + +import org.junit.Assert; +import org.junit.Ignore; +import org.junit.Test; + +import java.util.Iterator; +import java.util.List; + +public class PatternDFATest { + @Test + public void testMatchFullPath() throws IllegalPathException { + PartialPath p1 = new PartialPath("root.sg1.d1.*"); + + Assert.assertTrue(p1.matchFullPath(new PartialPath("root.sg1.d1.s2"))); + Assert.assertTrue(checkMatchUsingDFA(p1, new PartialPath("root.sg1.d1.s2"))); + Assert.assertFalse(p1.matchFullPath(new PartialPath("root.sg1.d1"))); + Assert.assertFalse(checkMatchUsingDFA(p1, new PartialPath("root.sg1.d1"))); + Assert.assertFalse(p1.matchFullPath(new PartialPath("root.sg2.d1.*"))); + Assert.assertFalse(checkMatchUsingDFA(p1, new PartialPath("root.sg2.d1.*"))); + Assert.assertFalse(p1.matchFullPath(new PartialPath("", false))); + Assert.assertFalse(checkMatchUsingDFA(p1, new PartialPath("", false))); + + PartialPath path = new PartialPath("root.sg1.d1.s1"); + String[] patterns1 = { + "root.sg1.d1.s1", + "root.sg1.*.s1", + "root.*.d1.*", + "root.*.*.*", + "root.s*.d1.s1", + "root.*g1.d1.s1", + "root.s*.d1.*", + "root.s*.d*.s*", + "root.**", + "root.**.s1", + "root.sg1.**", + }; + for (String pattern : patterns1) { + Assert.assertTrue(new PartialPath(pattern).matchFullPath(path)); + Assert.assertTrue(checkMatchUsingDFA(new PartialPath(pattern), path)); + } + + String[] patterns2 = { + "root2.sg1.d1.s1", + "root.sg1.*.s2", + "root.*.d2.s1", + "root.*.d*.s2", + "root.*.a*.s1", + "root.*", + "root.*.*", + "root.s*.d*.a*", + "root2.**", + "root.**.s2", + "root.**.d1", + "root.sg2.**", + }; + for (String pattern : patterns2) { + Assert.assertFalse(new PartialPath(pattern).matchFullPath(path)); + Assert.assertFalse(checkMatchUsingDFA(new PartialPath(pattern), path)); + } + } + + // TODO: remove this + @Test + @Ignore + public void test() throws IllegalPathException { + + Assert.assertFalse( Review Comment: Remove this. ########## node-commons/src/main/java/org/apache/iotdb/commons/path/fa/dfa/graph/DFAGraph.java: ########## @@ -0,0 +1,169 @@ +/* + * 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.iotdb.commons.path.fa.dfa.graph; + +import org.apache.iotdb.commons.path.fa.IFAState; +import org.apache.iotdb.commons.path.fa.IFATransition; +import org.apache.iotdb.commons.path.fa.dfa.DFAState; +import org.apache.iotdb.commons.utils.TestOnly; + +import java.util.ArrayList; +import java.util.Collection; +import java.util.HashMap; +import java.util.List; +import java.util.Map; +import java.util.Stack; + +public class DFAGraph { + private final List<IFAState> dfaStateList = new ArrayList<>(); + private final List<IFAState>[] dfaTransitionTable; + + public DFAGraph(NFAGraph nfaGraph, Collection<IFATransition> transitions) { + dfaTransitionTable = new List[transitions.size()]; + int closureSize = nfaGraph.getStateSize(); + // init start state + int index = 0; + // Map NFAStateClosure to DFASate + Map<Closure, DFAState> closureStateMap = new HashMap<>(); + for (IFATransition transition : transitions) { + dfaTransitionTable[transition.getIndex()] = new ArrayList<>(); + dfaTransitionTable[transition.getIndex()].add(null); + } + DFAState curState = new DFAState(index); + dfaStateList.add(curState); + Closure curClosure = new Closure(closureSize); + curClosure.addState(curState); + closureStateMap.put(curClosure, curState); + Stack<Closure> closureStack = new Stack<>(); + closureStack.push(curClosure); + + // construct DFA + while (!closureStack.isEmpty()) { + curClosure = closureStack.pop(); + for (IFATransition transition : transitions) { Review Comment: Add annotation ```subset construction``` referred to fundamentals of compiling. -- This is an automated message from the Apache Git Service. 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