org.eclipse.lsp4j.jsonrpc.ResponseErrorException#org.eclipse.lsp4j.PrepareRenameResult源码实例Demo

@Test
public void testRenameParameter() throws JavaModelException, BadLocationException {
	IPackageFragment pack1 = sourceFolder.createPackageFragment("test1", false, null);

	String[] codes = {
		"package test1;\n",
		"public class E {\n",
		"   public int foo(String str) {\n",
		"  		str|*.length();\n",
		"   }\n",
		"   public int bar(String str) {\n",
		"   	str.length();\n",
		"   }\n",
		"}\n"
	};
	StringBuilder builder = new StringBuilder();
	Position pos = mergeCode(builder, codes);
	ICompilationUnit cu = pack1.createCompilationUnit("E.java", builder.toString(), false, null);

	Either<Range, PrepareRenameResult> result = prepareRename(cu, pos, "newname");

	assertNotNull(result.getLeft());
	assertTrue(result.getLeft().getStart().getLine() > 0);
}
 

@Test
public void testRenameLocalVariable() throws JavaModelException, BadLocationException {
	IPackageFragment pack1 = sourceFolder.createPackageFragment("test1", false, null);

	String[] codes = {
		"package test1;\n",
		"public class E {\n",
		"   public int bar() {\n",
		"		String str = new String();\n",
		"   	str.length();\n",
		"   }\n",
		"   public int foo() {\n",
		"		String str = new String();\n",
		"   	str|*.length()\n",
		"   }\n",
		"}\n"
	};
	StringBuilder builder = new StringBuilder();
	Position pos = mergeCode(builder, codes);
	ICompilationUnit cu = pack1.createCompilationUnit("E.java", builder.toString(), false, null);

	Either<Range, PrepareRenameResult> result = prepareRename(cu, pos, "newname");
	assertNotNull(result.getLeft());
	assertTrue(result.getLeft().getStart().getLine() > 0);
}
 

@Test
public void testRenameField() throws JavaModelException, BadLocationException {
	IPackageFragment pack1 = sourceFolder.createPackageFragment("test1", false, null);

	String[] codes = {
			"package test1;\n",
			"public class E {\n",
			"	private int myValue = 2;\n",
			"   public void bar() {\n",
			"		myValue|* = 3;\n",
			"   }\n",
			"}\n"
	};
	StringBuilder builder = new StringBuilder();
	Position pos = mergeCode(builder, codes);
	ICompilationUnit cu = pack1.createCompilationUnit("E.java", builder.toString(), false, null);

	Either<Range, PrepareRenameResult> result = prepareRename(cu, pos, "newname");
	assertNotNull(result.getLeft());
	assertTrue(result.getLeft().getStart().getLine() > 0);
}
 

@Test
public void testRenameMethod() throws JavaModelException, BadLocationException {
	IPackageFragment pack1 = sourceFolder.createPackageFragment("test1", false, null);

	String[] codes = {
		"package test1;\n",
		"public class E {\n",
		"   public int bar() {\n",
		"   }\n",
		"   public int foo() {\n",
		"		this.bar|*();\n",
		"   }\n",
		"}\n"
	};
	StringBuilder builder = new StringBuilder();
	Position pos = mergeCode(builder, codes);
	ICompilationUnit cu = pack1.createCompilationUnit("E.java", builder.toString(), false, null);

	Either<Range, PrepareRenameResult> result = prepareRename(cu, pos, "newname");
	assertNotNull(result.getLeft());
	assertTrue(result.getLeft().getStart().getLine() > 0);
}
 

@Test
public void testRenameTypeWithResourceChanges() throws JavaModelException, BadLocationException {
	when(clientPreferences.isResourceOperationSupported()).thenReturn(true);

	IPackageFragment pack1 = sourceFolder.createPackageFragment("test1", false, null);

	String[] codes = { "package test1;\n",
			           "public class E|* {\n",
			           "   public E() {\n",
			           "   }\n",
			           "   public int bar() {\n", "   }\n",
			           "   public int foo() {\n",
			           "		this.bar();\n",
			           "   }\n",
			           "}\n" };
	StringBuilder builder = new StringBuilder();
	Position pos = mergeCode(builder, codes);
	ICompilationUnit cu = pack1.createCompilationUnit("E.java", builder.toString(), false, null);

	Either<Range, PrepareRenameResult> result = prepareRename(cu, pos, "Newname");
	assertNotNull(result.getLeft());
	assertTrue(result.getLeft().getStart().getLine() > 0);
}
 

@Test
public void testRenameTypeParameter() throws JavaModelException, BadLocationException {
	IPackageFragment pack1 = sourceFolder.createPackageFragment("test1", false, null);

	String[] codes= {
			"package test1;\n",
			"public class A<T|*> {\n",
			"	private T t;\n",
			"	public T get() { return t; }\n",
			"}\n"
	};

	StringBuilder builder = new StringBuilder();
	Position pos = mergeCode(builder, codes);
	ICompilationUnit cu = pack1.createCompilationUnit("A.java", builder.toString(), false, null);


	Either<Range, PrepareRenameResult> result = prepareRename(cu, pos, "TT");
	assertNotNull(result.getLeft());
	assertTrue(result.getLeft().getStart().getLine() > 0);
}
 

@Test
public void testRenameTypeParameterInMethod() throws JavaModelException, BadLocationException {
	IPackageFragment pack1 = sourceFolder.createPackageFragment("test1", false, null);

	String[] codes = {
			"package test1;\n",
			"public class B<T> {\n",
			"	private T t;\n",
			"	public <U|* extends Number> inspect(U u) { return u; }\n",
			"}\n"
	};

	StringBuilder builder = new StringBuilder();
	Position pos = mergeCode(builder, codes);
	ICompilationUnit cu = pack1.createCompilationUnit("B.java", builder.toString(), false, null);

	Either<Range, PrepareRenameResult> result = prepareRename(cu, pos, "UU");
	assertNotNull(result.getLeft());
	assertTrue(result.getLeft().getStart().getLine() > 0);
}
 

@Test
public void testRenameLambdaParameter() throws JavaModelException, BadLocationException {
	IPackageFragment pack1 = sourceFolder.createPackageFragment("test1", false, null);

	// @formatter:off
	String[] codes =
		{
			"package test1;\n",
			"import java.util.function.Function;\n",
			"public class Test {\n",
			"    Function<Integer, String> f = i|* -> \"\" + i;\n",
			"}\n"
		};
	// @formatter:on
	StringBuilder builder = new StringBuilder();
	Position pos = mergeCode(builder, codes);
	ICompilationUnit cu = pack1.createCompilationUnit("Test.java", builder.toString(), false, null);

	Either<Range, PrepareRenameResult> result = prepareRename(cu, pos, "j");
	assertNotNull(result.getLeft());
	assertTrue(result.getLeft().getStart().getLine() > 0);
}
 

@Test
public void testRenameJavadoc() throws JavaModelException, BadLocationException {
	IPackageFragment pack1 = sourceFolder.createPackageFragment("test1", false, null);

	String[] codes = {
			"package test1;\n",
			"public class E {\n",
			"	/**\n",
			"	 *@param i int\n",
			"	 */\n",
			"   public int foo(int i|*) {\n",
			"		E e = new E();\n",
			"		e.foo();\n",
			"   }\n",
			"}\n"
	};
	StringBuilder builder = new StringBuilder();
	Position pos = mergeCode(builder, codes);
	ICompilationUnit cu = pack1.createCompilationUnit("E.java", builder.toString(), false, null);

	Either<Range, PrepareRenameResult> result = prepareRename(cu, pos, "i2");
	assertNotNull(result.getLeft());
	assertTrue(result.getLeft().getStart().getLine() > 0);
}
 

/**
 * @since 2.18
 */
@Override
public CompletableFuture<Either<Range, PrepareRenameResult>> prepareRename(TextDocumentPositionParams params) {
	URI uri = getURI(params);
	return openFilesManager.runInOpenFileContext(uri, "prepareRename", (ofc, ci) -> {
		return prepareRename(ofc, params, ci);
	});
}
 

/**
 * Prepare the rename operation. Executed in a read request.
 */
protected Either<Range, PrepareRenameResult> prepareRename(OpenFileContext ofc, TextDocumentPositionParams params,
		CancelIndicator cancelIndicator) {
	URI uri = ofc.getURI();
	IRenameService2 renameService = getService(uri, IRenameService2.class);
	if (renameService == null) {
		throw new UnsupportedOperationException();
	}
	IRenameService2.PrepareRenameOptions options = new IRenameService2.PrepareRenameOptions();
	options.setLanguageServerAccess(access);
	options.setParams(params);
	options.setCancelIndicator(cancelIndicator);
	return renameService.prepareRename(options);
}
 

public Either<Range, PrepareRenameResult> prepareRename(TextDocumentPositionParams params, IProgressMonitor monitor) {

		final ICompilationUnit unit = JDTUtils.resolveCompilationUnit(params.getTextDocument().getUri());
		if (unit != null) {
			try {
				OccurrencesFinder finder = new OccurrencesFinder();
				CompilationUnit ast = CoreASTProvider.getInstance().getAST(unit, CoreASTProvider.WAIT_YES, monitor);

				if (ast != null) {
					int offset = JsonRpcHelpers.toOffset(unit.getBuffer(), params.getPosition().getLine(), params.getPosition().getCharacter());
					String error = finder.initialize(ast, offset, 0);
					if (error == null) {
						OccurrenceLocation[] occurrences = finder.getOccurrences();
						if (occurrences != null) {
							for (OccurrenceLocation loc : occurrences) {
								if (monitor.isCanceled()) {
									return Either.forLeft(new Range());
								}
								if (loc.getOffset() <= offset && loc.getOffset() + loc.getLength() >= offset) {
									InnovationContext context = new InnovationContext(unit, loc.getOffset(), loc.getLength());
									context.setASTRoot(ast);
									ASTNode node = context.getCoveredNode();
									// Rename package is not fully supported yet.
									if (!isBinaryOrPackage(node)) {
										return Either.forLeft(JDTUtils.toRange(unit, loc.getOffset(), loc.getLength()));
									}
								}
							}
						}
					}
				}

			} catch (CoreException e) {
				JavaLanguageServerPlugin.logException("Problem computing occurrences for" + unit.getElementName() + " in prepareRename", e);
			}
		}
		throw new ResponseErrorException(new ResponseError(ResponseErrorCode.InvalidRequest, "Renaming this element is not supported.", null));
	}
 

@Override
public CompletableFuture<Either<Range, PrepareRenameResult>> prepareRename(PrepareRenameParams params) {
	logInfo(">> document/prepareRename");
	PrepareRenameHandler handler = new PrepareRenameHandler();
	return computeAsync((monitor) -> {
		waitForLifecycleJobs(monitor);
		return handler.prepareRename(params, monitor);
	});
}
 

protected void renameAndFail(final String model, final Position position, final String messageFragment) {
  final String modelFile = this.writeFile("MyType.testlang", model);
  this.initialize();
  try {
    final TextDocumentIdentifier identifier = new TextDocumentIdentifier(modelFile);
    PrepareRenameParams _prepareRenameParams = new PrepareRenameParams(identifier, position);
    final Either<Range, PrepareRenameResult> prepareRenameResult = this.languageServer.prepareRename(_prepareRenameParams).get();
    StringConcatenation _builder = new StringConcatenation();
    _builder.append("expected null result got ");
    _builder.append(prepareRenameResult);
    _builder.append(" instead");
    Assert.assertNull(_builder.toString(), prepareRenameResult);
    TextDocumentIdentifier _textDocumentIdentifier = new TextDocumentIdentifier(modelFile);
    final RenameParams renameParams = new RenameParams(_textDocumentIdentifier, position, "Tescht");
    this.languageServer.rename(renameParams).get();
    Assert.fail("Rename should have failed");
  } catch (final Throwable _t) {
    if (_t instanceof Exception) {
      final Exception exc = (Exception)_t;
      final Throwable rootCause = Throwables.getRootCause(exc);
      Assert.assertTrue((rootCause instanceof ResponseErrorException));
      final ResponseError error = ((ResponseErrorException) rootCause).getResponseError();
      Assert.assertTrue(error.getData().toString().contains(messageFragment));
    } else {
      throw Exceptions.sneakyThrow(_t);
    }
  }
}
 

/**
 * Prepare the rename operation. Executed in a read request.
 * @since 2.20
 */
protected Either<Range, PrepareRenameResult> prepareRename(PrepareRenameParams params,
		CancelIndicator cancelIndicator) {
	URI uri = getURI(params);
	IRenameService2 renameService = getService(uri, IRenameService2.class);
	if (renameService == null) {
		throw new UnsupportedOperationException();
	}
	IRenameService2.PrepareRenameOptions options = new IRenameService2.PrepareRenameOptions();
	options.setLanguageServerAccess(access);
	options.setParams(params);
	options.setCancelIndicator(cancelIndicator);
	return renameService.prepareRename(options);
}
 

private Either<Range, PrepareRenameResult> prepareRename(ICompilationUnit cu, Position pos, String newName) {
	TextDocumentIdentifier identifier = new TextDocumentIdentifier(JDTUtils.toURI(cu));

	TextDocumentPositionParams params = new TextDocumentPositionParams(identifier, pos);
	return handler.prepareRename(params, monitor);
}
 

protected Either<Range, PrepareRenameResult> doPrepareRename(Resource resource, Document document,
		PrepareRenameParams params, CancelIndicator cancelIndicator) {
	String uri = params.getTextDocument().getUri();
	if (resource instanceof XtextResource) {
		ICompositeNode rootNode = null;
		XtextResource xtextResource = (XtextResource) resource;
		if (xtextResource != null) {
			IParseResult parseResult = xtextResource.getParseResult();
			if (parseResult != null) {
				rootNode = parseResult.getRootNode();
			}
		}
		if (rootNode == null) {
			RenameService2.LOG.trace("Could not retrieve root node for resource. URI: " + uri);
			return null;
		}
		Position caretPosition = params.getPosition();
		try {
			int caretOffset = document.getOffSet(caretPosition);
			EObject element = null;
			int candidateOffset = caretOffset;
			do {
				element = getElementWithIdentifierAt(xtextResource, candidateOffset);
				if (element != null && !element.eIsProxy()) {
					ILeafNode leaf = NodeModelUtils.findLeafNodeAtOffset(rootNode, candidateOffset);
					if (leaf != null && isIdentifier(leaf)) {
						String convertedNameValue = getConvertedValue(leaf.getGrammarElement(), leaf);
						String elementName = getElementName(element);
						if (!Strings.isEmpty(convertedNameValue) && !Strings.isEmpty(elementName)
								&& Objects.equal(convertedNameValue, elementName)) {
							Position start = document.getPosition(leaf.getOffset());
							Position end = document.getPosition(leaf.getEndOffset());
							return Either.forLeft(new Range(start, end));
						}
					}
				}
				candidateOffset = (candidateOffset - 1);
			} while (((candidateOffset >= 0) && ((candidateOffset + 1) >= caretOffset)));
		} catch (IndexOutOfBoundsException e) {
			RenameService2.LOG.trace("Invalid document " + toPositionFragment(caretPosition, uri));
			return null;
		}
		RenameService2.LOG.trace("No element found at " + toPositionFragment(caretPosition, uri));
	} else {
		RenameService2.LOG.trace("Loaded resource is not an XtextResource. URI: " + resource.getURI());
	}
	return null;
}
 

/**
 * If this method returns {@code false}, it is sure, that the rename operation will fail. There is no guarantee that
 * it will succeed even if it returns {@code true}.
 */
protected boolean mayPerformRename(Either<Range, PrepareRenameResult> prepareRenameResult,
		RenameParams renameParams) {
	return prepareRenameResult != null && prepareRenameResult.getLeft() != null
			&& Ranges.containsPosition(prepareRenameResult.getLeft(), renameParams.getPosition());
}
 

/**
 * @since 2.18
 */
@Override
public CompletableFuture<Either<Range, PrepareRenameResult>> prepareRename(PrepareRenameParams params) {
	return requestManager.runRead(cancelIndicator -> prepareRename(params, cancelIndicator));
}
 

/**
 * Returns a {@link Range range} describing the range of the string to rename and optionally a placeholder text of
 * the string content to be renamed.
 * 
 * <p>
 * If {@code null} is returned then it is deemed that invoking {@link #rename rename} with the same text document
 * position will not result in a valid {@link WorkspaceEdit workspace edit}.
 * 
 * <p>
 * The default implementation only checks whether there is an identifier under the give text document position or
 * not.
 * 
 * <p>
 * This method should be used to set up and to test the validity of a rename operation at a given location.</br>
 * See <a href=
 * "https://microsoft.github.io/language-server-protocol/specification#textDocument_prepareRename">{@code textDocument/prepareRename}</a>
 * for more details.
 */
Either<Range, PrepareRenameResult> prepareRename(IRenameService2.PrepareRenameOptions options);
 

/**
 * The prepare rename request is sent from the client to the server to setup and test the validity of a rename
 * operation at a given location.
 * 
 * Since version 3.12.0
 */
@JsonRequest
@ResponseJsonAdapter(PrepareRenameResponseAdapter.class)
default CompletableFuture<Either<Range, PrepareRenameResult>> prepareRename(PrepareRenameParams params) {
	throw new UnsupportedOperationException();
}