Java CompletionProposal.POTENTIAL_METHOD_DECLARATION属性代码示例

private void ignoreAll() {
  int[] ignoredKinds = new int[] {
      CompletionProposal.ANONYMOUS_CLASS_DECLARATION,
      CompletionProposal.FIELD_REF, CompletionProposal.KEYWORD,
      CompletionProposal.LABEL_REF, CompletionProposal.LOCAL_VARIABLE_REF,
      CompletionProposal.METHOD_REF, CompletionProposal.METHOD_DECLARATION,
      CompletionProposal.PACKAGE_REF, CompletionProposal.TYPE_REF,
      CompletionProposal.VARIABLE_DECLARATION,
      CompletionProposal.POTENTIAL_METHOD_DECLARATION,
      CompletionProposal.METHOD_NAME_REFERENCE,
      CompletionProposal.ANNOTATION_ATTRIBUTE_REF,
      CompletionProposal.JAVADOC_FIELD_REF,
      CompletionProposal.JAVADOC_METHOD_REF,
      CompletionProposal.JAVADOC_TYPE_REF,
      CompletionProposal.JAVADOC_VALUE_REF,
      CompletionProposal.JAVADOC_PARAM_REF,
      CompletionProposal.JAVADOC_BLOCK_TAG,
      CompletionProposal.JAVADOC_INLINE_TAG, CompletionProposal.FIELD_IMPORT,
      CompletionProposal.METHOD_IMPORT, CompletionProposal.TYPE_IMPORT};

  for (int kind : ignoredKinds) {
    setIgnored(kind, true);
  }
}
 

/**
 * Creates and returns the method signature suitable for display.
 *
 * @param proposal
 *            the proposal to create the description for
 * @return the string of method signature suitable for display
 */
public StringBuilder createMethodProposalDescription(CompletionProposal proposal) {
	int kind = proposal.getKind();
	StringBuilder description = new StringBuilder();
	switch (kind) {
		case CompletionProposal.METHOD_REF:
		case CompletionProposal.METHOD_NAME_REFERENCE:
		case CompletionProposal.POTENTIAL_METHOD_DECLARATION:
		case CompletionProposal.CONSTRUCTOR_INVOCATION:

			// method name
			description.append(proposal.getName());

			// parameters
			description.append('(');
			appendUnboundedParameterList(description, proposal);
			description.append(')');

			// return type
			if (!proposal.isConstructor()) {
				// TODO remove SignatureUtil.fix83600 call when bugs are fixed
				char[] returnType = createTypeDisplayName(SignatureUtil.getUpperBound(Signature.getReturnType(SignatureUtil.fix83600(proposal.getSignature()))));
				description.append(RETURN_TYPE_SEPARATOR);
				description.append(returnType);
			}
	}
	return description; // dummy
}
 

@Override
public void accept(CompletionProposal proposal) {
	if (!isIgnored(proposal.getKind())) {
		if (proposal.getKind() == CompletionProposal.POTENTIAL_METHOD_DECLARATION) {
			acceptPotentialMethodDeclaration(proposal);
		} else {
			if (proposal.getKind() == CompletionProposal.PACKAGE_REF && unit.getParent() != null && String.valueOf(proposal.getCompletion()).equals(unit.getParent().getElementName())) {
				// Hacky way to boost relevance of current package, for package completions, until
				// https://bugs.eclipse.org/518140 is fixed
				proposal.setRelevance(proposal.getRelevance() + 1);
			}
			proposals.add(proposal);
		}
	}
}
 

/**
 * Computes the relevance for a given <code>CompletionProposal</code>.
 *
 * @param proposal the proposal to compute the relevance for
 * @return the relevance for <code>proposal</code>
 */
public static String computeSortText(CompletionProposal proposal) {
	final int baseRelevance= proposal.getRelevance() * 16;
	switch (proposal.getKind()) {
	case CompletionProposal.LABEL_REF:
		return convertRelevance( baseRelevance + 1);
	case CompletionProposal.KEYWORD:
		return convertRelevance(baseRelevance + 2);
	case CompletionProposal.TYPE_REF:
	case CompletionProposal.ANONYMOUS_CLASS_DECLARATION:
	case CompletionProposal.ANONYMOUS_CLASS_CONSTRUCTOR_INVOCATION:
		return convertRelevance(baseRelevance + 3);
	case CompletionProposal.METHOD_REF:
	case CompletionProposal.CONSTRUCTOR_INVOCATION:
	case CompletionProposal.METHOD_NAME_REFERENCE:
	case CompletionProposal.METHOD_DECLARATION:
	case CompletionProposal.ANNOTATION_ATTRIBUTE_REF:
	case CompletionProposal.POTENTIAL_METHOD_DECLARATION:
		return convertRelevance(baseRelevance + 4);
	case CompletionProposal.FIELD_REF:
		return convertRelevance(baseRelevance + 5);
	case CompletionProposal.LOCAL_VARIABLE_REF:
	case CompletionProposal.VARIABLE_DECLARATION:
		return convertRelevance(baseRelevance + 6);
	case CompletionProposal.PACKAGE_REF://intentional fall-through
	default:
		return convertRelevance(baseRelevance);
	}
}
 

/**
 * {@inheritDoc}
 *
 * <p>Subclasses may replace, but usually should not need to. Consider replacing {@linkplain
 * #createJavaCompletionProposal(org.eclipse.jdt.core.CompletionProposal)
 * createJavaCompletionProposal} instead.
 */
@Override
public void accept(CompletionProposal proposal) {
  long start = DEBUG ? System.currentTimeMillis() : 0;
  try {
    if (isFiltered(proposal)) return;

    if (proposal.getKind() == CompletionProposal.POTENTIAL_METHOD_DECLARATION) {
      acceptPotentialMethodDeclaration(proposal);
    } else {
      IJavaCompletionProposal javaProposal = createJavaCompletionProposal(proposal);
      if (javaProposal != null) {
        fJavaProposals.add(javaProposal);
        if (proposal.getKind() == CompletionProposal.KEYWORD) fKeywords.add(javaProposal);
      }
    }
  } catch (IllegalArgumentException e) {
    // all signature processing method may throw IAEs
    // https://bugs.eclipse.org/bugs/show_bug.cgi?id=84657
    // don't abort, but log and show all the valid proposals
    JavaPlugin.log(
        new Status(
            IStatus.ERROR,
            JavaPlugin.getPluginId(),
            IStatus.OK,
            "Exception when processing proposal for: " + String.valueOf(proposal.getCompletion()),
            e)); // $NON-NLS-1$
  }

  if (DEBUG) fUITime += System.currentTimeMillis() - start;
}
 

/**
 * Computes the relevance for a given <code>CompletionProposal</code>.
 *
 * <p>Subclasses may replace, but usually should not need to.
 *
 * @param proposal the proposal to compute the relevance for
 * @return the relevance for <code>proposal</code>
 */
protected int computeRelevance(CompletionProposal proposal) {
  final int baseRelevance = proposal.getRelevance() * 16;
  switch (proposal.getKind()) {
    case CompletionProposal.PACKAGE_REF:
      return baseRelevance + 0;
    case CompletionProposal.LABEL_REF:
      return baseRelevance + 1;
    case CompletionProposal.KEYWORD:
      return baseRelevance + 2;
    case CompletionProposal.TYPE_REF:
    case CompletionProposal.ANONYMOUS_CLASS_DECLARATION:
    case CompletionProposal.ANONYMOUS_CLASS_CONSTRUCTOR_INVOCATION:
      return baseRelevance + 3;
    case CompletionProposal.METHOD_REF:
    case CompletionProposal.CONSTRUCTOR_INVOCATION:
    case CompletionProposal.METHOD_NAME_REFERENCE:
    case CompletionProposal.METHOD_DECLARATION:
    case CompletionProposal.ANNOTATION_ATTRIBUTE_REF:
      return baseRelevance + 4;
    case CompletionProposal.POTENTIAL_METHOD_DECLARATION:
      return baseRelevance + 4 /* + 99 */;
    case CompletionProposal.FIELD_REF:
      return baseRelevance + 5;
    case CompletionProposal.LOCAL_VARIABLE_REF:
    case CompletionProposal.VARIABLE_DECLARATION:
      return baseRelevance + 6;
    default:
      return baseRelevance;
  }
}
 

/**
 * Returns the type signature of the declaring type of a <code>CompletionProposal</code>, or
 * <code>null</code> for proposals that do not have a declaring type. The return value is
 * <em>not</em> <code>null</code> for proposals of the following kinds:
 *
 * <ul>
 *   <li>METHOD_DECLARATION
 *   <li>METHOD_NAME_REFERENCE
 *   <li>METHOD_REF
 *   <li>ANNOTATION_ATTRIBUTE_REF
 *   <li>POTENTIAL_METHOD_DECLARATION
 *   <li>ANONYMOUS_CLASS_DECLARATION
 *   <li>FIELD_REF
 *   <li>PACKAGE_REF (returns the package, but no type)
 *   <li>TYPE_REF
 * </ul>
 *
 * @param proposal the completion proposal to get the declaring type for
 * @return the type signature of the declaring type, or <code>null</code> if there is none
 * @see org.eclipse.jdt.core.Signature#toCharArray(char[])
 */
protected final char[] getDeclaringType(CompletionProposal proposal) {
  switch (proposal.getKind()) {
    case CompletionProposal.METHOD_DECLARATION:
    case CompletionProposal.METHOD_NAME_REFERENCE:
    case CompletionProposal.JAVADOC_METHOD_REF:
    case CompletionProposal.METHOD_REF:
    case CompletionProposal.CONSTRUCTOR_INVOCATION:
    case CompletionProposal.ANONYMOUS_CLASS_CONSTRUCTOR_INVOCATION:
    case CompletionProposal.METHOD_REF_WITH_CASTED_RECEIVER:
    case CompletionProposal.ANNOTATION_ATTRIBUTE_REF:
    case CompletionProposal.POTENTIAL_METHOD_DECLARATION:
    case CompletionProposal.ANONYMOUS_CLASS_DECLARATION:
    case CompletionProposal.FIELD_REF:
    case CompletionProposal.FIELD_REF_WITH_CASTED_RECEIVER:
    case CompletionProposal.JAVADOC_FIELD_REF:
    case CompletionProposal.JAVADOC_VALUE_REF:
      char[] declaration = proposal.getDeclarationSignature();
      // special methods may not have a declaring type: methods defined on arrays etc.
      // Currently known: class literals don't have a declaring type - use Object
      if (declaration == null) return "java.lang.Object".toCharArray(); // $NON-NLS-1$
      return Signature.toCharArray(declaration);
    case CompletionProposal.PACKAGE_REF:
      return proposal.getDeclarationSignature();
    case CompletionProposal.JAVADOC_TYPE_REF:
    case CompletionProposal.TYPE_REF:
      return Signature.toCharArray(proposal.getSignature());
    case CompletionProposal.LOCAL_VARIABLE_REF:
    case CompletionProposal.VARIABLE_DECLARATION:
    case CompletionProposal.KEYWORD:
    case CompletionProposal.LABEL_REF:
    case CompletionProposal.JAVADOC_BLOCK_TAG:
    case CompletionProposal.JAVADOC_INLINE_TAG:
    case CompletionProposal.JAVADOC_PARAM_REF:
      return null;
    default:
      Assert.isTrue(false);
      return null;
  }
}
 

protected int computeRelevance() {
  final int baseRelevance = fProposal.getRelevance() * 16;
  switch (fProposal.getKind()) {
    case CompletionProposal.PACKAGE_REF:
      return baseRelevance + 0;
    case CompletionProposal.LABEL_REF:
      return baseRelevance + 1;
    case CompletionProposal.KEYWORD:
      return baseRelevance + 2;
    case CompletionProposal.TYPE_REF:
    case CompletionProposal.ANONYMOUS_CLASS_DECLARATION:
    case CompletionProposal.ANONYMOUS_CLASS_CONSTRUCTOR_INVOCATION:
      return baseRelevance + 3;
    case CompletionProposal.METHOD_REF:
    case CompletionProposal.CONSTRUCTOR_INVOCATION:
    case CompletionProposal.METHOD_NAME_REFERENCE:
    case CompletionProposal.METHOD_DECLARATION:
    case CompletionProposal.ANNOTATION_ATTRIBUTE_REF:
      return baseRelevance + 4;
    case CompletionProposal.POTENTIAL_METHOD_DECLARATION:
      return baseRelevance + 4 /* + 99 */;
    case CompletionProposal.FIELD_REF:
      return baseRelevance + 5;
    case CompletionProposal.LOCAL_VARIABLE_REF:
    case CompletionProposal.VARIABLE_DECLARATION:
      return baseRelevance + 6;
    default:
      return baseRelevance;
  }
}
 

/**
 * Updates the description fields of the item.
 *
 * @param proposal
 * @param item
 */
public void updateDescription(CompletionProposal proposal, CompletionItem item) {
	switch (proposal.getKind()) {
		case CompletionProposal.METHOD_NAME_REFERENCE:
		case CompletionProposal.METHOD_REF:
		case CompletionProposal.CONSTRUCTOR_INVOCATION:
		case CompletionProposal.METHOD_REF_WITH_CASTED_RECEIVER:
		case CompletionProposal.POTENTIAL_METHOD_DECLARATION:
			if (fContext != null && fContext.isInJavadoc()) {
				createJavadocMethodProposalLabel(proposal, item);
				break;
			}
			createMethodProposalLabel(proposal, item);
			break;
		case CompletionProposal.METHOD_DECLARATION:
			createOverrideMethodProposalLabel(proposal, item);
			break;
		case CompletionProposal.ANONYMOUS_CLASS_DECLARATION:
		case CompletionProposal.ANONYMOUS_CLASS_CONSTRUCTOR_INVOCATION:
			createAnonymousTypeLabel(proposal, item);
			break;
		case CompletionProposal.TYPE_REF:
			createTypeProposalLabel(proposal, item);
			break;
		case CompletionProposal.JAVADOC_TYPE_REF:
			createJavadocTypeProposalLabel(proposal, item);
			break;
		case CompletionProposal.JAVADOC_FIELD_REF:
		case CompletionProposal.JAVADOC_VALUE_REF:
		case CompletionProposal.JAVADOC_BLOCK_TAG:
		case CompletionProposal.JAVADOC_INLINE_TAG:
		case CompletionProposal.JAVADOC_PARAM_REF:
			createJavadocSimpleProposalLabel(proposal, item);
			break;
		case CompletionProposal.JAVADOC_METHOD_REF:
			createJavadocMethodProposalLabel(proposal, item);
			break;
		case CompletionProposal.PACKAGE_REF:
		case CompletionProposal.MODULE_DECLARATION:
		case CompletionProposal.MODULE_REF:
			createPackageProposalLabel(proposal, item);
			break;
		case CompletionProposal.ANNOTATION_ATTRIBUTE_REF:
		case CompletionProposal.FIELD_REF:
		case CompletionProposal.FIELD_REF_WITH_CASTED_RECEIVER:
			createLabelWithTypeAndDeclaration(proposal, item);
			break;
		case CompletionProposal.LOCAL_VARIABLE_REF:
		case CompletionProposal.VARIABLE_DECLARATION:
			createSimpleLabelWithType(proposal, item);
			break;
		case CompletionProposal.KEYWORD:
		case CompletionProposal.LABEL_REF:
			item.setLabel(createSimpleLabel(proposal).toString());
			break;
		default:
			JavaLanguageServerPlugin.logInfo(new String(proposal.getName()) + " is of type " + getProposal(proposal));
			Assert.isTrue(false);
	}
}
 

private CompletionItemKind mapKind(final int kind) {
	switch (kind) {
	case CompletionProposal.ANONYMOUS_CLASS_CONSTRUCTOR_INVOCATION:
	case CompletionProposal.CONSTRUCTOR_INVOCATION:
		return CompletionItemKind.Constructor;
	case CompletionProposal.ANONYMOUS_CLASS_DECLARATION:
	case CompletionProposal.TYPE_REF:
		return CompletionItemKind.Class;
	case CompletionProposal.FIELD_IMPORT:
	case CompletionProposal.METHOD_IMPORT:
	case CompletionProposal.METHOD_NAME_REFERENCE:
	case CompletionProposal.PACKAGE_REF:
	case CompletionProposal.TYPE_IMPORT:
		return CompletionItemKind.Module;
	case CompletionProposal.FIELD_REF:
	case CompletionProposal.FIELD_REF_WITH_CASTED_RECEIVER:
		return CompletionItemKind.Field;
	case CompletionProposal.KEYWORD:
		return CompletionItemKind.Keyword;
	case CompletionProposal.LABEL_REF:
		return CompletionItemKind.Reference;
	case CompletionProposal.LOCAL_VARIABLE_REF:
	case CompletionProposal.VARIABLE_DECLARATION:
		return CompletionItemKind.Variable;
	case CompletionProposal.METHOD_DECLARATION:
	case CompletionProposal.METHOD_REF:
	case CompletionProposal.METHOD_REF_WITH_CASTED_RECEIVER:
	case CompletionProposal.POTENTIAL_METHOD_DECLARATION:
		return CompletionItemKind.Function;
		//text
	case CompletionProposal.ANNOTATION_ATTRIBUTE_REF:
	case CompletionProposal.JAVADOC_BLOCK_TAG:
	case CompletionProposal.JAVADOC_FIELD_REF:
	case CompletionProposal.JAVADOC_INLINE_TAG:
	case CompletionProposal.JAVADOC_METHOD_REF:
	case CompletionProposal.JAVADOC_PARAM_REF:
	case CompletionProposal.JAVADOC_TYPE_REF:
	case CompletionProposal.JAVADOC_VALUE_REF:
	default:
		return CompletionItemKind.Text;
	}
}
 

/**
 * Updates the replacement and any additional replacement for the given item.
 *
 * @param proposal
 * @param item
 * @param trigger
 */
public void updateReplacement(CompletionProposal proposal, CompletionItem item, char trigger) {
	// reset importRewrite
	this.importRewrite = TypeProposalUtils.createImportRewrite(compilationUnit);

	List<org.eclipse.lsp4j.TextEdit> additionalTextEdits = new ArrayList<>();

	StringBuilder completionBuffer = new StringBuilder();
	Range range = null;
	if (isSupportingRequiredProposals(proposal)) {
		CompletionProposal[] requiredProposals= proposal.getRequiredProposals();
		if (requiredProposals != null) {
			for (CompletionProposal requiredProposal : requiredProposals) {
				switch(requiredProposal.getKind()) {
				case CompletionProposal.TYPE_IMPORT:
				case CompletionProposal.METHOD_IMPORT:
				case CompletionProposal.FIELD_IMPORT:
					appendImportProposal(completionBuffer, requiredProposal, proposal.getKind());
					break;
				case CompletionProposal.TYPE_REF:
					org.eclipse.lsp4j.TextEdit edit = toRequiredTypeEdit(requiredProposal, trigger, proposal.canUseDiamond(context));
						if (proposal.getKind() == CompletionProposal.CONSTRUCTOR_INVOCATION || proposal.getKind() == CompletionProposal.ANONYMOUS_CLASS_CONSTRUCTOR_INVOCATION
								|| proposal.getKind() == CompletionProposal.ANONYMOUS_CLASS_DECLARATION) {
						completionBuffer.append(edit.getNewText());
						range = edit.getRange();
					} else {
						additionalTextEdits.add(edit);
					}
					break;
				default:
					/*
					 * In 3.3 we only support the above required proposals, see
					 * CompletionProposal#getRequiredProposals()
					 */
					Assert.isTrue(false);
				}
			}
		}
	}

	if (range == null) {
		range = toReplacementRange(proposal);
	}
	if(proposal.getKind() == CompletionProposal.METHOD_DECLARATION){
		appendMethodOverrideReplacement(completionBuffer, proposal);
	} else if (proposal.getKind() == CompletionProposal.POTENTIAL_METHOD_DECLARATION && proposal instanceof GetterSetterCompletionProposal) {
		appendMethodPotentialReplacement(completionBuffer, (GetterSetterCompletionProposal) proposal);
	} else if (proposal.getKind() == CompletionProposal.ANONYMOUS_CLASS_CONSTRUCTOR_INVOCATION || proposal.getKind() == CompletionProposal.ANONYMOUS_CLASS_DECLARATION) {
		appendAnonymousClass(completionBuffer, proposal, range);
	} else {
		appendReplacementString(completionBuffer, proposal);
	}
	//select insertTextFormat.
	if( client.isCompletionSnippetsSupported()){
		item.setInsertTextFormat(InsertTextFormat.Snippet);
	}else{
		item.setInsertTextFormat(InsertTextFormat.PlainText);
	}
	String text = completionBuffer.toString();
	if(range != null){
		item.setTextEdit(new org.eclipse.lsp4j.TextEdit(range, text));
	}else{
		// fallback
		item.setInsertText(text);
	}
	addImports(additionalTextEdits);
	if(!additionalTextEdits.isEmpty()){
		item.setAdditionalTextEdits(additionalTextEdits);
	}
}
 

public GetterSetterCompletionProposal(IField field, boolean isGetter, int offset) {
	super(CompletionProposal.POTENTIAL_METHOD_DECLARATION, offset);
	fField = field;
	fIsGetter = isGetter;
}
 

/**
 * Creates a display label with styles for a given <code>CompletionProposal</code>.
 *
 * @param proposal the completion proposal to create the display label for
 * @return the display label for <code>proposal</code>
 * @since 3.4
 */
public StyledString createStyledLabel(CompletionProposal proposal) {
  switch (proposal.getKind()) {
    case CompletionProposal.METHOD_NAME_REFERENCE:
    case CompletionProposal.METHOD_REF:
    case CompletionProposal.CONSTRUCTOR_INVOCATION:
    case CompletionProposal.METHOD_REF_WITH_CASTED_RECEIVER:
    case CompletionProposal.POTENTIAL_METHOD_DECLARATION:
      if (fContext != null && fContext.isInJavadoc())
        return createJavadocMethodProposalLabel(proposal);
      return createMethodProposalLabel(proposal);
    case CompletionProposal.METHOD_DECLARATION:
      return createOverrideMethodProposalLabel(proposal);
    case CompletionProposal.ANONYMOUS_CLASS_DECLARATION:
    case CompletionProposal.ANONYMOUS_CLASS_CONSTRUCTOR_INVOCATION:
      return createAnonymousTypeLabel(proposal);
    case CompletionProposal.TYPE_REF:
      return createTypeProposalLabel(proposal);
    case CompletionProposal.JAVADOC_TYPE_REF:
      return createJavadocTypeProposalLabel(proposal);
    case CompletionProposal.JAVADOC_FIELD_REF:
    case CompletionProposal.JAVADOC_VALUE_REF:
    case CompletionProposal.JAVADOC_BLOCK_TAG:
    case CompletionProposal.JAVADOC_INLINE_TAG:
    case CompletionProposal.JAVADOC_PARAM_REF:
      return createJavadocSimpleProposalLabel(proposal);
    case CompletionProposal.JAVADOC_METHOD_REF:
      return createJavadocMethodProposalLabel(proposal);
    case CompletionProposal.PACKAGE_REF:
      return createPackageProposalLabel(proposal);
    case CompletionProposal.ANNOTATION_ATTRIBUTE_REF:
    case CompletionProposal.FIELD_REF:
    case CompletionProposal.FIELD_REF_WITH_CASTED_RECEIVER:
      return createLabelWithTypeAndDeclaration(proposal);
    case CompletionProposal.LOCAL_VARIABLE_REF:
    case CompletionProposal.VARIABLE_DECLARATION:
      return createSimpleLabelWithType(proposal);
    case CompletionProposal.KEYWORD:
    case CompletionProposal.LABEL_REF:
      return createSimpleLabel(proposal);
    default:
      Assert.isTrue(false);
      return null;
  }
}
 

/**
 * Creates and returns a decorated image descriptor for a completion proposal.
 *
 * @param proposal the proposal for which to create an image descriptor
 * @return the created image descriptor, or <code>null</code> if no image is available
 */
public ImageDescriptor createImageDescriptor(CompletionProposal proposal) {
  final int flags = proposal.getFlags();

  ImageDescriptor descriptor;
  switch (proposal.getKind()) {
    case CompletionProposal.METHOD_DECLARATION:
    case CompletionProposal.METHOD_NAME_REFERENCE:
    case CompletionProposal.METHOD_REF:
    case CompletionProposal.CONSTRUCTOR_INVOCATION:
    case CompletionProposal.METHOD_REF_WITH_CASTED_RECEIVER:
    case CompletionProposal.ANNOTATION_ATTRIBUTE_REF:
    case CompletionProposal.POTENTIAL_METHOD_DECLARATION:
    case CompletionProposal.ANONYMOUS_CLASS_DECLARATION:
    case CompletionProposal.ANONYMOUS_CLASS_CONSTRUCTOR_INVOCATION:
      descriptor = JavaElementImageProvider.getMethodImageDescriptor(false, flags);
      break;
    case CompletionProposal.TYPE_REF:
      switch (Signature.getTypeSignatureKind(proposal.getSignature())) {
        case Signature.CLASS_TYPE_SIGNATURE:
          descriptor =
              JavaElementImageProvider.getTypeImageDescriptor(false, false, flags, false);
          break;
        case Signature.TYPE_VARIABLE_SIGNATURE:
          descriptor = JavaPluginImages.DESC_OBJS_TYPEVARIABLE;
          break;
        default:
          descriptor = null;
      }
      break;
    case CompletionProposal.FIELD_REF:
    case CompletionProposal.FIELD_REF_WITH_CASTED_RECEIVER:
      descriptor = JavaElementImageProvider.getFieldImageDescriptor(false, flags);
      break;
    case CompletionProposal.LOCAL_VARIABLE_REF:
    case CompletionProposal.VARIABLE_DECLARATION:
      descriptor = JavaPluginImages.DESC_OBJS_LOCAL_VARIABLE;
      break;
    case CompletionProposal.PACKAGE_REF:
      descriptor = JavaPluginImages.DESC_OBJS_PACKAGE;
      break;
    case CompletionProposal.KEYWORD:
    case CompletionProposal.LABEL_REF:
      descriptor = null;
      break;
    case CompletionProposal.JAVADOC_METHOD_REF:
    case CompletionProposal.JAVADOC_TYPE_REF:
    case CompletionProposal.JAVADOC_FIELD_REF:
    case CompletionProposal.JAVADOC_VALUE_REF:
    case CompletionProposal.JAVADOC_BLOCK_TAG:
    case CompletionProposal.JAVADOC_INLINE_TAG:
    case CompletionProposal.JAVADOC_PARAM_REF:
      descriptor = JavaPluginImages.DESC_OBJS_JAVADOCTAG;
      break;
    default:
      descriptor = null;
      Assert.isTrue(false);
  }

  if (descriptor == null) return null;
  return decorateImageDescriptor(descriptor, proposal);
}
 

/**
 * Creates a new java completion proposal from a core proposal. This may involve computing the
 * display label and setting up some context.
 *
 * <p>This method is called for every proposal that will be displayed to the user, which may be
 * hundreds. Implementations should therefore defer as much work as possible: Labels should be
 * computed lazily to leverage virtual table usage, and any information only needed when
 * <em>applying</em> a proposal should not be computed yet.
 *
 * <p>Implementations may return <code>null</code> if a proposal should not be included in the
 * list presented to the user.
 *
 * <p>Subclasses may extend or replace this method.
 *
 * @param proposal the core completion proposal to create a UI proposal for
 * @return the created java completion proposal, or <code>null</code> if no proposal should be
 *     displayed
 */
protected IJavaCompletionProposal createJavaCompletionProposal(CompletionProposal proposal) {
  switch (proposal.getKind()) {
    case CompletionProposal.KEYWORD:
      return createKeywordProposal(proposal);
    case CompletionProposal.PACKAGE_REF:
      return createPackageProposal(proposal);
    case CompletionProposal.TYPE_REF:
      return createTypeProposal(proposal);
    case CompletionProposal.JAVADOC_TYPE_REF:
      return createJavadocLinkTypeProposal(proposal);
    case CompletionProposal.FIELD_REF:
    case CompletionProposal.JAVADOC_FIELD_REF:
    case CompletionProposal.JAVADOC_VALUE_REF:
      return createFieldProposal(proposal);
    case CompletionProposal.FIELD_REF_WITH_CASTED_RECEIVER:
      return createFieldWithCastedReceiverProposal(proposal);
    case CompletionProposal.METHOD_REF:
    case CompletionProposal.CONSTRUCTOR_INVOCATION:
    case CompletionProposal.METHOD_REF_WITH_CASTED_RECEIVER:
    case CompletionProposal.METHOD_NAME_REFERENCE:
    case CompletionProposal.JAVADOC_METHOD_REF:
      return createMethodReferenceProposal(proposal);
    case CompletionProposal.METHOD_DECLARATION:
      return createMethodDeclarationProposal(proposal);
    case CompletionProposal.ANONYMOUS_CLASS_CONSTRUCTOR_INVOCATION:
      return createAnonymousTypeProposal(proposal, getInvocationContext());
    case CompletionProposal.ANONYMOUS_CLASS_DECLARATION:
      return createAnonymousTypeProposal(proposal, null);
    case CompletionProposal.LABEL_REF:
      return createLabelProposal(proposal);
    case CompletionProposal.LOCAL_VARIABLE_REF:
    case CompletionProposal.VARIABLE_DECLARATION:
      return createLocalVariableProposal(proposal);
    case CompletionProposal.ANNOTATION_ATTRIBUTE_REF:
      return createAnnotationAttributeReferenceProposal(proposal);
    case CompletionProposal.JAVADOC_BLOCK_TAG:
    case CompletionProposal.JAVADOC_PARAM_REF:
      return createJavadocSimpleProposal(proposal);
    case CompletionProposal.JAVADOC_INLINE_TAG:
      return createJavadocInlineTagProposal(proposal);
    case CompletionProposal.POTENTIAL_METHOD_DECLARATION:
    default:
      return null;
  }
}