org.libreoffice.ide.eclipse.java.JavaMainProvider.java Source code

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Here is the source code for org.libreoffice.ide.eclipse.java.JavaMainProvider.java

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/*************************************************************************
 *
 * $RCSfile: JavaMainProvider.java,v $
 *
 * $Revision: 1.2 $
 *
 * last change: $Author: cedricbosdo $ $Date: 2007/11/25 20:32:38 $
 *
 * The Contents of this file are made available subject to the terms of
 * the GNU Lesser General Public License Version 2.1
 *
 * Sun Microsystems Inc., October, 2000
 *
 *
 * GNU Lesser General Public License Version 2.1
 * =============================================
 * Copyright 2000 by Sun Microsystems, Inc.
 * 901 San Antonio Road, Palo Alto, CA 94303, USA
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License version 2.1, as published by the Free Software Foundation.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 *
 * The Initial Developer of the Original Code is: Sun Microsystems, Inc..
 *
 * Copyright: 2002 by Sun Microsystems, Inc.
 *
 * All Rights Reserved.
 *
 * Contributor(s): Cedric Bosdonnat
 *
 *
 ************************************************************************/
package org.libreoffice.ide.eclipse.java;

import java.util.Vector;

import org.eclipse.core.resources.IProject;
import org.eclipse.jdt.core.ICompilationUnit;
import org.eclipse.jdt.core.IJavaElement;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.IPackageFragmentRoot;
import org.eclipse.jdt.core.IParent;
import org.eclipse.jdt.core.IType;
import org.eclipse.jdt.core.ITypeHierarchy;
import org.eclipse.jdt.core.JavaCore;
import org.libreoffice.ide.eclipse.core.launch.IMainProvider;

/**
 * Class providing the XMain implementations in Java.
 */
public class JavaMainProvider implements IMainProvider {

    /**
     * {@inheritDoc}
     */
    @Override
    public Vector<String> getMainNames(IProject pProject) {
        Vector<String> mains = new Vector<String>();

        IJavaProject javaPrj = JavaCore.create(pProject);
        try {
            mains.addAll(getInternalMainNames(javaPrj));
        } catch (Exception e) {
        }

        return mains;
    }

    /**
     * Recursive method to find the Classes and check their hierarchy.
     *
     * @param pElement the Java AST element for scan for XMain implementations
     * @return the names of the classes implementing the XMain interface in the
     *      Java AST element.
     */
    private Vector<String> getInternalMainNames(IParent pElement) {
        Vector<String> mains = new Vector<String>();

        try {
            for (IJavaElement child : pElement.getChildren()) {

                boolean visit = true;

                if (child instanceof IPackageFragmentRoot) {
                    IPackageFragmentRoot root = (IPackageFragmentRoot) child;
                    if (root.getKind() != IPackageFragmentRoot.K_SOURCE) {
                        visit = false;
                    }
                }

                if (visit) {
                    if (child instanceof ICompilationUnit) {
                        ICompilationUnit unit = (ICompilationUnit) child;
                        IType type = unit.findPrimaryType();

                        if (isMainImplementation(type)) {
                            mains.add(type.getFullyQualifiedName());
                        }
                    } else if (child instanceof IParent) {
                        mains.addAll(getInternalMainNames((IParent) child));
                    }
                }
            }
        } catch (Exception e) {
        }

        return mains;
    }

    /**
     * Checks if the Java type implements the <code>com.sun.star.lang.XMain</code>
     * interface.
     *
     * @param pType the Java type to check
     * @return <code>true</code> if the type implements <code>XMain</code>,
     *      <code>false</code> otherwise.
     */
    private boolean isMainImplementation(IType pType) {
        boolean isMainImplementation = false;

        try {
            ITypeHierarchy hierarchy = pType.newSupertypeHierarchy(null);
            IType[] superInterfaces = hierarchy.getAllSuperInterfaces(pType);

            int i = 0;
            while (!isMainImplementation && i < superInterfaces.length) {
                if (superInterfaces[i].getFullyQualifiedName().equals("com.sun.star.lang.XMain")) { //$NON-NLS-1$
                    isMainImplementation = true;
                } else {
                    i++;
                }
            }
        } catch (Exception e) {
        }

        return isMainImplementation;
    }
}