com.halware.nakedide.eclipse.ext.annot.tracker.AstJob.java Source code

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Here is the source code for com.halware.nakedide.eclipse.ext.annot.tracker.AstJob.java

Source

package com.halware.nakedide.eclipse.ext.annot.tracker;

import java.util.Calendar;
import java.util.Date;

import org.apache.log4j.Logger;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.runtime.jobs.Job;
import org.eclipse.jdt.core.IClassFile;
import org.eclipse.jdt.core.ICompilationUnit;
import org.eclipse.jdt.core.IJavaElement;
import org.eclipse.jdt.core.IOpenable;
import org.eclipse.jdt.core.dom.AST;
import org.eclipse.jdt.core.dom.ASTParser;
import org.eclipse.jdt.core.dom.CompilationUnit;
import org.eclipse.jface.viewers.IStructuredSelection;

public class AstJob extends Job {

    private final static Logger LOGGER = Logger.getLogger(AstJob.class);

    public Logger getLOGGER() {
        return LOGGER;
    }

    public AstJob(EditorContent editorContent, IStructuredSelection selectionHint) {
        this(editorContent, selectionHint, true, true);
        setSystem(true); // shouldn't appear in the progress view.
    }

    private AstJob(EditorContent editorContent, IStructuredSelection selectionHint, boolean resolveBindings,
            boolean statementsRecovery) {
        super(deriveJobName(editorContent));
        this.editorContent = editorContent;
        this.selectionHint = selectionHint;
        this.resolveBindings = resolveBindings;
        this.statementsRecovery = statementsRecovery;
        this.scheduledAt = Calendar.getInstance().getTime();
    }

    private static String deriveJobName(EditorContent editorContent) {
        IJavaElement openable = (IJavaElement) editorContent.getOpenable();
        return openable != null ? openable.getElementName() : "NULL";
    }

    private final EditorContent editorContent;

    public EditorContent getEditorContent() {
        return editorContent;
    }

    private final boolean resolveBindings;

    public boolean isResolveBindings() {
        return resolveBindings;
    }

    private final boolean statementsRecovery;

    public boolean isStatementsRecovery() {
        return statementsRecovery;
    }

    private final Date scheduledAt;

    public Date getScheduledAt() {
        return scheduledAt;
    }

    @Override
    protected IStatus run(IProgressMonitor monitor) {
        getLOGGER().debug("run(): started");
        try {
            if (!editorContent.isValid() || editorContent.isNull()) {
                return Status.OK_STATUS;
            }
            if (isCancelRequested()) {
                return Status.CANCEL_STATUS;
            }
            ASTParser parser = ASTParser.newParser(AST.JLS3);
            parser.setResolveBindings(isResolveBindings());
            IOpenable openable = editorContent.getOpenable();
            if (openable instanceof ICompilationUnit) {
                parser.setSource((ICompilationUnit) openable);
            } else {
                parser.setSource((IClassFile) openable);
            }
            parser.setStatementsRecovery(isStatementsRecovery());
            CompilationUnit parsedCompilationUnit = (CompilationUnit) parser.createAST(null);
            editorContent.setParsedCompilationUnit(parsedCompilationUnit);

            if (isCancelRequested()) {
                return Status.CANCEL_STATUS;
            }

            return Status.OK_STATUS;
        } finally {
            getLOGGER().debug("run(): completed");
        }
    }

    private IStructuredSelection selectionHint;

    public IStructuredSelection getSelectionHint() {
        return selectionHint;
    }

    private boolean cancelRequested = false;

    public void cancelIfPossible() {
        cancel(); // if not yet scheduled
        this.cancelRequested = true;
    }

    public boolean isCancelRequested() {
        return cancelRequested;
    }

}

/******************************************************************************
 * (c) 2007 Haywood Associates Ltd.
 * 
 * Distributed under Eclipse Public License 1.0, see
 * http://www.eclipse.org/legal/epl-v10.html for full details.
 *
 * In particular:
 * THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR 
 * CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT 
 * LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT, 
 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
 *
 * If you require this software under any other type of license, then contact 
 * Dan Haywood through http://www.haywood-associates.co.uk.
 *
 *****************************************************************************/