2 * Copyright 2000-2016 JetBrains s.r.o.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
16 package com.intellij.codeInspection.ui;
18 import com.intellij.codeInspection.CommonProblemDescriptor;
19 import com.intellij.openapi.diagnostic.Logger;
20 import com.intellij.util.ui.tree.TreeUtil;
21 import gnu.trove.THashMap;
24 import java.util.function.Supplier;
29 //guarded by single tree rebuild thread
30 public class InspectionTreeNodeReuser {
31 private final static Logger LOG = Logger.getInstance(InspectionTreeNodeReuser.class);
32 private final Map<CommonProblemDescriptor, ProblemDescriptionNode> myReusedNodes = new THashMap<>();
34 public InspectionTreeNodeReuser(InspectionTree tree) {
35 TreeUtil.traverse(tree.getRoot(), n -> {
36 if (n instanceof ProblemDescriptionNode) {
37 CommonProblemDescriptor descriptor = ((ProblemDescriptionNode)n).getDescriptor();
38 if (descriptor != null) {
39 myReusedNodes.put(descriptor, (ProblemDescriptionNode)n);
46 public ProblemDescriptionNode getOrCreate(CommonProblemDescriptor descriptor, Supplier<ProblemDescriptionNode> produces) {
47 ProblemDescriptionNode node = myReusedNodes.get(descriptor);
51 return produces.get();