| /* |
| * 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. |
| */ |
| /* |
| * Contributor(s): Alexandru Gyori <Alexandru.Gyori at gmail.com> |
| */ |
| package org.netbeans.modules.java.hints.jdk.mapreduce; |
| |
| import com.sun.source.tree.BlockTree; |
| import com.sun.source.tree.EnhancedForLoopTree; |
| import com.sun.source.tree.StatementTree; |
| import com.sun.source.tree.Tree; |
| import com.sun.source.util.TreePath; |
| import javax.lang.model.SourceVersion; |
| import org.netbeans.api.java.source.CompilationInfo; |
| import org.netbeans.spi.editor.hints.ErrorDescription; |
| import org.netbeans.spi.editor.hints.Fix; |
| import org.netbeans.spi.java.hints.ErrorDescriptionFactory; |
| import org.netbeans.spi.java.hints.Hint; |
| import org.netbeans.spi.java.hints.HintContext; |
| import org.netbeans.spi.java.hints.JavaFix; |
| import org.netbeans.spi.java.hints.TriggerTreeKind; |
| import org.openide.util.NbBundle.Messages; |
| |
| @Hint(displayName = "#DN_ForLoopToFunctionalHint", description = "#DESC_ForLoopToFunctionalHint", category = "general", |
| minSourceVersion = "8") |
| @Messages({ |
| "DN_ForLoopToFunctionalHint=Use Functional Operations", |
| "DESC_ForLoopToFunctionalHint=Use functional operations instead of imperative style loop." |
| }) |
| public class ForLoopToFunctionalHint { |
| |
| static boolean DISABLE_CHECK_FOR_STREAM = false; |
| |
| @TriggerTreeKind(Tree.Kind.ENHANCED_FOR_LOOP) |
| @Messages("ERR_ForLoopToFunctionalHint=Can use functional operations") |
| public static ErrorDescription computeWarning(HintContext ctx) { |
| if (ctx.getInfo().getElements().getTypeElement("java.util.stream.Streams") == null && !DISABLE_CHECK_FOR_STREAM) return null; |
| |
| PreconditionsChecker pc = new PreconditionsChecker(ctx.getPath().getLeaf(), ctx.getInfo()); |
| if (pc.isSafeToRefactor()) { |
| EnhancedForLoopTree eflt = (EnhancedForLoopTree)ctx.getPath().getLeaf(); |
| StatementTree stmt = eflt.getStatement(); |
| if (stmt == null) { |
| return null; |
| } |
| if (stmt.getKind() == Tree.Kind.BLOCK) { |
| BlockTree bt = (BlockTree)stmt; |
| if (bt.getStatements() == null || bt.getStatements().isEmpty()) { |
| return null; |
| } |
| } |
| Fix fix = new FixImpl(ctx.getInfo(), ctx.getPath(), null).toEditorFix(); |
| return ErrorDescriptionFactory.forName(ctx, ctx.getPath(), Bundle.ERR_ForLoopToFunctionalHint(), fix); |
| } |
| return null; |
| } |
| |
| private static final class FixImpl extends JavaFix { |
| |
| public FixImpl(CompilationInfo info, TreePath tp, PreconditionsChecker pc) { |
| super(info, tp); |
| this.pc = pc; |
| |
| } |
| |
| @Override |
| @Messages("FIX_ForLoopToFunctionalHint=Use Functional Operation") |
| protected String getText() { |
| return Bundle.FIX_ForLoopToFunctionalHint(); |
| } |
| private PreconditionsChecker pc; |
| private Refactorer refactorer; |
| |
| @Override |
| protected void performRewrite(TransformationContext ctx) { |
| EnhancedForLoopTree loop = (EnhancedForLoopTree) ctx.getPath().getLeaf(); |
| pc = new PreconditionsChecker(loop, ctx.getWorkingCopy()); |
| refactorer = new Refactorer(loop, ctx.getWorkingCopy(), pc); |
| if (pc.isSafeToRefactor() && refactorer.isRefactorable()) { |
| ctx.getWorkingCopy().rewrite(ctx.getPath().getLeaf(), refactorer.refactor(ctx.getWorkingCopy().getTreeMaker())); |
| } |
| } |
| } |
| } |