org.eclipse.ui.workbench.texteditor.hyperlinkDetectors

참고 : http://help.eclipse.org/stable/index.jsp?topic=/org.eclipse.platform.doc.isv/reference/extension-points/org_eclipse_ui_workbench_texteditor_hyperlinkDetectors.html

EJB를 사용할 때 ctrl+click해서 구현한 Bean에 바로가기 위해서 만들어 본 것

public class JavaElementHyperlinkDetector extends AbstractHyperlinkDetector {

	/*
	 * @see
	 * org.eclipse.jface.text.hyperlink.IHyperlinkDetector#detectHyperlinks(
	 * org.eclipse.jface.text.ITextViewer, org.eclipse.jface.text.IRegion,
	 * boolean)
	 */
	public IHyperlink[] detectHyperlinks(ITextViewer textViewer,
			IRegion region, boolean canShowMultipleHyperlinks) {
		ITextEditor textEditor = (ITextEditor) getAdapter(ITextEditor.class);
		if (region == null || !(textEditor instanceof JavaEditor)) {
			return null;
		}

		IAction openAction = textEditor.getAction("OpenEditor");
		if (!(openAction instanceof SelectionDispatchAction)) {
			return null;
		}

		int offset = region.getOffset();

		IJavaElement input = EditorUtility.getEditorInputJavaElement(
				textEditor, false);
		if (input == null) {
			return null;
		}

		try {
			IDocument document = textEditor.getDocumentProvider().getDocument(
					textEditor.getEditorInput());
			IRegion wordRegion = JavaWordFinder.findWord(document, offset);
			if (wordRegion == null || wordRegion.getLength() == 0) {
				return null;
			}

			IJavaElement[] elements = null;
			elements = ((ICodeAssist) input).codeSelect(wordRegion.getOffset(),
					wordRegion.getLength());
			elements = selectOpenableElements(elements);
			if (elements.length == 0) {
				return null;
			}

			IHyperlink[] result = new IHyperlink[elements.length];
			for (int i = 0; i < elements.length; i++) {
				result[i] = new JavaElementHyperlink(wordRegion,
						(SelectionDispatchAction) openAction, elements[i],
						elements.length > 1);
			}
			return result;
		} catch (JavaModelException e) {
			return null;
		}
	}

	private IJavaElement[] selectOpenableElements(IJavaElement[] elements) {
		List result = new ArrayList(elements.length);
		for (int i = 0; i < elements.length; i++) {
			IJavaElement element = elements[i];
			switch (element.getElementType()) {
			case IJavaElement.PACKAGE_DECLARATION:
			case IJavaElement.PACKAGE_FRAGMENT:
			case IJavaElement.PACKAGE_FRAGMENT_ROOT:
			case IJavaElement.JAVA_PROJECT:
			case IJavaElement.JAVA_MODEL:
				break;
			default:
				IJavaElement ejbElement = getElementToOpen(element);
				if (ejbElement != element) {
					result.add(ejbElement);
				}
				break;
			}
		}
		return (IJavaElement[]) result.toArray(new IJavaElement[result.size()]);
	}

	private IJavaElement getElementToOpen(final IJavaElement element) {
		IJavaElement target = element;

		boolean isMethod = false;
		if (element.getElementType() == IJavaElement.METHOD) {
			isMethod = true;
			target = element.getParent();
		}

		if (target.getElementType() == IJavaElement.TYPE) {

			try {
				if (target instanceof IType) {
					IType type = (IType) target;

					if (JavaEEProjectUtilities.isEJBProject(target
							.getJavaProject().getProject())) {
						EnterpriseBean bean = J2EEProjectUtilities
								.getEnterpriseBean(type.getCompilationUnit());
						if (bean != null) {
							type = target.getJavaProject().findType(
									bean.getEjbClassName());
							if (type != null) {
								target = type;

								if (isMethod) {
									IMethod lMethod = (IMethod) element;
									IMethod eMethod = null;
									IJavaElement[] children = type
											.getChildren();
									if (children != null && children.length > 0) {
										for (IJavaElement c : children) {
											if (c.getElementType() == element.getElementType()
													&& c.getElementName().equals(element.getElementName())) {
												eMethod = (IMethod) c;
												if (ArrayUtils.equals(lMethod.getParameterTypes(), eMethod.getParameterTypes())) {
													return c;
												}
												target = c; // 일단 이름만 비슷한걸로 찾기 위해서 
											}
										}
									}
								}

								return target;
							}
						}
					}
				}
			} catch (Exception e) {
				return element;
			}
		}

		return element;
	}
}