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...jdt.ls.core/src/org/eclipse/jdt/ls/core/internal/handlers/ChangeSignatureInfoHandler.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,100 @@ | ||
| /******************************************************************************* | ||
| * Copyright (c) 2016-2024 Red Hat Inc. and others. | ||
| * All rights reserved. This program and the accompanying materials | ||
| * are made available under the terms of the Eclipse Public License 2.0 | ||
| * which accompanies this distribution, and is available at | ||
| * https://www.eclipse.org/legal/epl-2.0/ | ||
| * | ||
| * SPDX-License-Identifier: EPL-2.0 | ||
| * | ||
| * Contributors: | ||
| * Red Hat Inc. - initial API and implementation | ||
| *******************************************************************************/ | ||
| package org.eclipse.jdt.ls.core.internal.handlers; | ||
|
|
||
| import java.util.ArrayList; | ||
| import java.util.List; | ||
|
|
||
| import org.eclipse.core.runtime.CoreException; | ||
| import org.eclipse.core.runtime.IProgressMonitor; | ||
| import org.eclipse.core.runtime.NullProgressMonitor; | ||
| import org.eclipse.jdt.core.ICompilationUnit; | ||
| import org.eclipse.jdt.core.IJavaElement; | ||
| import org.eclipse.jdt.core.IMethod; | ||
| import org.eclipse.jdt.core.dom.ASTNode; | ||
| import org.eclipse.jdt.core.dom.CompilationUnit; | ||
| import org.eclipse.jdt.core.dom.IMethodBinding; | ||
| import org.eclipse.jdt.core.dom.MethodDeclaration; | ||
| import org.eclipse.jdt.core.manipulation.CoreASTProvider; | ||
| import org.eclipse.jdt.internal.corext.refactoring.ExceptionInfo; | ||
| import org.eclipse.jdt.internal.corext.refactoring.ParameterInfo; | ||
| import org.eclipse.jdt.internal.corext.refactoring.RefactoringAvailabilityTesterCore; | ||
| import org.eclipse.jdt.internal.corext.refactoring.structure.ChangeSignatureProcessor; | ||
| import org.eclipse.jdt.internal.corext.util.JdtFlags; | ||
| import org.eclipse.jdt.ls.core.internal.JDTUtils; | ||
| import org.eclipse.jdt.ls.core.internal.JavaLanguageServerPlugin; | ||
| import org.eclipse.jdt.ls.core.internal.handlers.ChangeSignatureHandler.MethodException; | ||
| import org.eclipse.jdt.ls.core.internal.handlers.ChangeSignatureHandler.MethodParameter; | ||
| import org.eclipse.jdt.ls.core.internal.text.correction.ChangeSignatureInfo; | ||
| import org.eclipse.jdt.ls.core.internal.text.correction.CodeActionUtility; | ||
| import org.eclipse.jdt.ui.text.java.IInvocationContext; | ||
| import org.eclipse.lsp4j.CodeActionParams; | ||
| import org.eclipse.ltk.core.refactoring.RefactoringStatus; | ||
|
|
||
| public class ChangeSignatureInfoHandler { | ||
|
|
||
| /** | ||
| * | ||
| */ | ||
| private static final String CANNOT_CHANGE_SIGNATURE = "Cannot change signature."; | ||
|
|
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| public static ChangeSignatureInfo getChangeSignatureInfo(CodeActionParams params, IProgressMonitor monitor) { | ||
| if (monitor.isCanceled()) { | ||
| return null; | ||
| } | ||
| final ICompilationUnit unit = JDTUtils.resolveCompilationUnit(params.getTextDocument().getUri()); | ||
| if (unit == null || monitor.isCanceled()) { | ||
| return null; | ||
| } | ||
| CompilationUnit astRoot = CoreASTProvider.getInstance().getAST(unit, CoreASTProvider.WAIT_YES, monitor); | ||
| if (astRoot == null || monitor.isCanceled()) { | ||
| return null; | ||
| } | ||
| IInvocationContext context = CodeActionHandler.getContext(unit, astRoot, params.getRange()); | ||
| ASTNode methodNode = CodeActionUtility.inferASTNode(context.getCoveringNode(), MethodDeclaration.class); | ||
| if (methodNode == null) { | ||
| return null; | ||
| } | ||
| IMethodBinding methodBinding = ((MethodDeclaration) methodNode).resolveBinding(); | ||
| if (methodBinding == null) { | ||
| return null; | ||
| } | ||
| IJavaElement element = methodBinding.getJavaElement(); | ||
| if (element instanceof IMethod method) { | ||
| try { | ||
| ChangeSignatureProcessor processor = new ChangeSignatureProcessor(method); | ||
| if (RefactoringAvailabilityTesterCore.isChangeSignatureAvailable(method)) { | ||
| RefactoringStatus status = processor.checkInitialConditions(new NullProgressMonitor()); | ||
| if (status.isOK()) { | ||
| List<MethodParameter> parameters = new ArrayList<>(); | ||
| for (ParameterInfo info : processor.getParameterInfos()) { | ||
| parameters.add(new MethodParameter(info.getOldTypeName(), info.getOldName(), info.getDefaultValue() == null ? "null" : info.getDefaultValue(), info.getOldIndex())); | ||
| } | ||
| List<MethodException> exceptions = new ArrayList<>(); | ||
| for (ExceptionInfo info : processor.getExceptionInfos()) { | ||
| exceptions.add(new MethodException(info.getFullyQualifiedName(), info.getElement().getHandleIdentifier())); | ||
| } | ||
| return new ChangeSignatureInfo(method.getHandleIdentifier(), JdtFlags.getVisibilityString(processor.getVisibility()), processor.getReturnTypeString(), method.getElementName(), | ||
| parameters.toArray(MethodParameter[]::new), exceptions.toArray(MethodException[]::new)); | ||
| } else { | ||
| return new ChangeSignatureInfo(CANNOT_CHANGE_SIGNATURE + status.getMessageMatchingSeverity(status.getSeverity())); | ||
| } | ||
| } | ||
| } catch (CoreException e) { | ||
| JavaLanguageServerPlugin.logException(e); | ||
| } | ||
| } | ||
| return new ChangeSignatureInfo(CANNOT_CHANGE_SIGNATURE); | ||
| } | ||
|
|
||
| } |
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