Java ICompilationUnit.codeComplete方法代码示例

import org.eclipse.jdt.core.ICompilationUnit; //导入方法依赖的package包/类
private void complete(String projectName, String packageName, String unitName, String completeAt, String completeBehind, int[] ignoredKinds, int warmupCount,
    int iterationCount) throws CoreException {

  AbstractJavaModelTests.waitUntilIndexesReady();

  TestCompletionRequestor requestor = new TestCompletionRequestor();
  if (ignoredKinds != null) {
    for (int i = 0; i < ignoredKinds.length; i++) {
      requestor.setIgnored(ignoredKinds[i], true);
    }
  }

  ICompilationUnit unit = getCompilationUnit(projectName, packageName, unitName);

  String str = unit.getSource();
  int completionIndex = str.indexOf(completeAt) + completeBehind.length();

  if (DEBUG)
    System.out.print("Perform code assist inside " + unitName + "...");

  for (int j = 0; j < iterationCount; j++) {
    unit.codeComplete(completionIndex, requestor);
  }
  if (DEBUG)
    System.out.println("done!");
}
 

import org.eclipse.jdt.core.ICompilationUnit; //导入方法依赖的package包/类
private SimilarElement[] process(ICompilationUnit cu, int pos) throws JavaModelException {
	try {
		cu.codeComplete(pos, this);
		processKeywords();
		return fResult.toArray(new SimilarElement[fResult.size()]);
	} finally {
		fResult.clear();
	}
}
 

import org.eclipse.jdt.core.ICompilationUnit; //导入方法依赖的package包/类
public SignatureHelp signatureHelp(TextDocumentPositionParams position, IProgressMonitor monitor) {

		SignatureHelp help = new SignatureHelp();

		if (!preferenceManager.getPreferences(null).isSignatureHelpEnabled()) {
			return help;
		}

		try {
			ICompilationUnit unit = JDTUtils.resolveCompilationUnit(position.getTextDocument().getUri());
			final int offset = JsonRpcHelpers.toOffset(unit.getBuffer(), position.getPosition().getLine(), position.getPosition().getCharacter());
			int[] contextInfomation = getContextInfomation(unit.getBuffer(), offset);
			if (contextInfomation[0] == -1) {
				return help;
			}
			SignatureHelpRequestor collector = new SignatureHelpRequestor(unit, contextInfomation[0] + 1);

			if (offset > -1 && !monitor.isCanceled()) {
				unit.codeComplete(contextInfomation[0] + 1, collector, monitor);
				help = collector.getSignatureHelp(monitor);

				if (help != null) {
					int currentParameter = contextInfomation[1];
					List<SignatureInformation> infos = help.getSignatures();
					for (int i = 0; i < infos.size(); i++) {
						if (infos.get(i).getParameters().size() >= currentParameter + 1) {
							help.setActiveSignature(i);
							help.setActiveParameter(currentParameter);
							break;
						}
					}
				}
			}
		} catch (CoreException ex) {
			JavaLanguageServerPlugin.logException("Find signatureHelp failure ", ex);
		}
		return help;
	}
 

import org.eclipse.jdt.core.ICompilationUnit; //导入方法依赖的package包/类
public static String[] getStaticImportFavorites(ICompilationUnit cu, final String elementName, boolean isMethod, String[] favorites) throws JavaModelException {
	StringBuffer dummyCU= new StringBuffer();
	String packName= cu.getParent().getElementName();
	IType type= cu.findPrimaryType();
	if (type == null) {
		return new String[0];
	}

	if (packName.length() > 0) {
		dummyCU.append("package ").append(packName).append(';'); //$NON-NLS-1$
	}
	dummyCU.append("public class ").append(type.getElementName()).append("{\n static {\n").append(elementName); // static initializer  //$NON-NLS-1$//$NON-NLS-2$
	int offset= dummyCU.length();
	dummyCU.append("\n}\n }"); //$NON-NLS-1$

	ICompilationUnit newCU= null;
	try {
		newCU= cu.getWorkingCopy(null);
		newCU.getBuffer().setContents(dummyCU.toString());

		final HashSet<String> result= new HashSet<>();

		CompletionRequestor requestor= new CompletionRequestor(true) {
			@Override
			public void accept(CompletionProposal proposal) {
				if (elementName.equals(new String(proposal.getName()))) {
					CompletionProposal[] requiredProposals= proposal.getRequiredProposals();
					for (int i= 0; i < requiredProposals.length; i++) {
						CompletionProposal curr= requiredProposals[i];
						if (curr.getKind() == CompletionProposal.METHOD_IMPORT || curr.getKind() == CompletionProposal.FIELD_IMPORT) {
							result.add(JavaModelUtil.concatenateName(Signature.toCharArray(curr.getDeclarationSignature()), curr.getName()));
						}
					}
				}
			}
		};

		if (isMethod) {
			requestor.setIgnored(CompletionProposal.METHOD_REF, false);
			requestor.setAllowsRequiredProposals(CompletionProposal.METHOD_REF, CompletionProposal.METHOD_IMPORT, true);
		} else {
			requestor.setIgnored(CompletionProposal.FIELD_REF, false);
			requestor.setAllowsRequiredProposals(CompletionProposal.FIELD_REF, CompletionProposal.FIELD_IMPORT, true);
		}
		requestor.setFavoriteReferences(favorites);

		newCU.codeComplete(offset, requestor);

		return result.toArray(new String[result.size()]);
	} finally {
		if (newCU != null) {
			newCU.discardWorkingCopy();
		}
	}
}
 

import org.eclipse.jdt.core.ICompilationUnit; //导入方法依赖的package包/类
private List<CompletionItem> computeContentAssist(ICompilationUnit unit, int line, int column, IProgressMonitor monitor) throws JavaModelException {
	CompletionResponses.clear();
	if (unit == null) {
		return Collections.emptyList();
	}
	List<CompletionItem> proposals = new ArrayList<>();

	final int offset = JsonRpcHelpers.toOffset(unit.getBuffer(), line, column);
	CompletionProposalRequestor collector = new CompletionProposalRequestor(unit, offset);
	// Allow completions for unresolved types - since 3.3
	collector.setAllowsRequiredProposals(CompletionProposal.FIELD_REF, CompletionProposal.TYPE_REF, true);
	collector.setAllowsRequiredProposals(CompletionProposal.FIELD_REF, CompletionProposal.TYPE_IMPORT, true);
	collector.setAllowsRequiredProposals(CompletionProposal.FIELD_REF, CompletionProposal.FIELD_IMPORT, true);

	collector.setAllowsRequiredProposals(CompletionProposal.METHOD_REF, CompletionProposal.TYPE_REF, true);
	collector.setAllowsRequiredProposals(CompletionProposal.METHOD_REF, CompletionProposal.TYPE_IMPORT, true);
	collector.setAllowsRequiredProposals(CompletionProposal.METHOD_REF, CompletionProposal.METHOD_IMPORT, true);

	collector.setAllowsRequiredProposals(CompletionProposal.CONSTRUCTOR_INVOCATION, CompletionProposal.TYPE_REF, true);

	collector.setAllowsRequiredProposals(CompletionProposal.ANONYMOUS_CLASS_CONSTRUCTOR_INVOCATION, CompletionProposal.TYPE_REF, true);
	collector.setAllowsRequiredProposals(CompletionProposal.ANONYMOUS_CLASS_DECLARATION, CompletionProposal.TYPE_REF, true);

	collector.setAllowsRequiredProposals(CompletionProposal.TYPE_REF, CompletionProposal.TYPE_REF, true);

	if (offset >-1 && !monitor.isCanceled()) {
		IBuffer buffer = unit.getBuffer();
		if (buffer != null && buffer.getLength() >= offset) {
			IProgressMonitor subMonitor = new ProgressMonitorWrapper(monitor) {
				private long timeLimit;
				private static final long TIMEOUT = 5000;

				@Override
				public void beginTask(String name, int totalWork) {
					timeLimit = System.currentTimeMillis() + TIMEOUT;
				}

				@Override
				public boolean isCanceled() {
					return super.isCanceled() || timeLimit <= System.currentTimeMillis();
				}

			};
			try {
				unit.codeComplete(offset, collector, subMonitor);
				proposals.addAll(collector.getCompletionItems());
			} catch (OperationCanceledException e) {
				monitor.setCanceled(true);
			}
		}
	}
	return proposals;
}