Examples of org.eclipse.jdt.core.IJavaElement

org.eclipse.jdt.core.IJavaElement
Common protocol for all elements provided by the Java model. Java model elements are exposed to clients as handles to the actual underlying element. The Java model may hand out any number of handles for each element. Handles that refer to the same element are guaranteed to be equal, but not necessarily identical.
Methods annotated as "handle-only" do not require underlying elements to exist. Methods that require underlying elements to exist throw a JavaModelException when an underlying element is missing. JavaModelException.isDoesNotExist can be used to recognize this common special case.
@noimplement This interface is not intended to be implemented by clients.

     */
    private static int getAnonCompilePriority50(IJavaElement javaElement,
        IJavaElement firstAncestor, IJavaElement topAncestor) {


        // search for initializer block
        IJavaElement initBlock = getLastAncestor(javaElement, IJavaElement.INITIALIZER);
        // test is for anon. classes from initializer blocks
        if (initBlock != null) {
            return 10; // from inner from class init
        }

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        IJavaElement firstAncestor, IJavaElement topAncestor, boolean is50OrHigher) {
        if(is50OrHigher){
            return getAnonCompilePriority50(elt, firstAncestor, topAncestor);
        }


        IJavaElement firstNonAnon = getFirstNonAnonymous(elt, topAncestor);


        // get rid of children from local types
        if(topAncestor != firstNonAnon && isLocal(firstNonAnon)){
            return 5; // local anon. types have same prio as anon. from regular code
        }


        IJavaElement initBlock = getLastAncestor(elt, IJavaElement.INITIALIZER);
        // test is for anon. classes from initializer blocks
        if (initBlock != null) {
            if(isAnyParentLocal(firstAncestor, topAncestor)){
                return 5; // init blocks from local types have same prio as regular
            }

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        IClassFile classFile = getClassFile();
        if (classFile == null) {
            return null;
        }
        IJavaElement result = null;
        if (isDecompiled()) {
            IDocument document = getDocumentProvider().getDocument(
                getEditorInput());
            try {
                // XXX have test if the requested line is from bytecode or sourcecode?!?

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        } else {
            int offset = sourceViewer.getVisibleRegion().getOffset();
            caret = offset + styledText.getCaretOffset();
        }


        IJavaElement element = getElementAt(caret);


        if (!(element instanceof ISourceReference)) {
            return null;
        }
        return (ISourceReference) element;

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     * @param file the class file
     * @return the package fragment root of the given class file
     */
    IPackageFragmentRoot getPackageFragmentRoot(IClassFile file) {


        IJavaElement element= file.getParent();
        while (element != null && element.getElementType() != IJavaElement.PACKAGE_FRAGMENT_ROOT) {
            element= element.getParent();
        }


        return (IPackageFragmentRoot) element;
    }

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         * Very simple comparision based on init/not init block decision and then on the
         * source code position
         */
        private int compare50(IType m1, IType m2){


            IJavaElement firstAncestor1 = getFirstAncestor(m1);
            IJavaElement firstAncestor2 = getFirstAncestor(m2);


            int compilePrio1 = getCompilePrio(m1, firstAncestor1);
            int compilePrio2 = getCompilePrio(m2, firstAncestor2);


            if (compilePrio1 > compilePrio2) {

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            IType m2 = (IType) o2;
            if(is50OrHigher){
                return compare50(m1, m2);
            }


            IJavaElement firstAncestor1 = getFirstAncestor(m1);
            IJavaElement firstAncestor2 = getFirstAncestor(m2);


            int compilePrio1 = getCompilePrio(m1, firstAncestor1);
            int compilePrio2 = getCompilePrio(m2, firstAncestor2);


            if (compilePrio1 > compilePrio2) {

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     * @return editor input as IJavaElement
     */
    public static IJavaElement getJavaInput(IEditorPart part) {
        IEditorInput editorInput = part.getEditorInput();
        if (editorInput != null) {
            IJavaElement input = (IJavaElement) editorInput
                .getAdapter(IJavaElement.class);
            return input;
        }
        return null;
    }

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        int type = resource.getElementType();
        if (type == IJavaElement.PACKAGE_FRAGMENT
            || type == IJavaElement.PACKAGE_FRAGMENT_ROOT) {
            return name;
        }
        IJavaElement ancestor = resource
            .getAncestor(IJavaElement.PACKAGE_FRAGMENT);
        if (ancestor != null) {
            return ancestor.getElementName();
        }
        return ""; //$NON-NLS-1$
    }

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    public void run(IAction action) {
        // always only one element!
        IJavaElement[] resources = getSelectedResources();


        // select one from input dialog
        IJavaElement element2 = selectJavaElement();
        if (element2 == null) {
            return;
        }
        try {
            exec(resources[0], element2);

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