org.hyperic.hypclipse.internal.util.HQDEJavaHelper.java Source code

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Here is the source code for org.hyperic.hypclipse.internal.util.HQDEJavaHelper.java

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/**********************************************************************************
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Icons under 'icons/fugue' are made by Yusuke Kamiyamane http://www.pinvoke.com/.
 * Licensed under a Creative Commons Attribution 3.0 license.
 * <http://creativecommons.org/licenses/by/3.0/>
 *
 *********************************************************************************/
package org.hyperic.hypclipse.internal.util;

import java.util.ArrayList;

import org.eclipse.core.resources.IProject;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.Path;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.IPackageFragmentRoot;
import org.eclipse.jdt.core.JavaCore;
import org.eclipse.jdt.core.JavaModelException;
import org.eclipse.jdt.core.search.IJavaSearchScope;
import org.eclipse.jdt.core.search.SearchEngine;
import org.eclipse.jdt.launching.JavaRuntime;

public class HQDEJavaHelper {

    public static IJavaSearchScope getSearchScope(IJavaProject project) {
        return SearchEngine.createJavaSearchScope(getNonJRERoots(project));
    }

    public static IJavaSearchScope getSearchScope(IProject project) {
        return getSearchScope(JavaCore.create(project));
    }

    public static IPackageFragmentRoot[] getNonJRERoots(IJavaProject project) {
        ArrayList<IPackageFragmentRoot> result = new ArrayList<IPackageFragmentRoot>();
        try {
            IPackageFragmentRoot[] roots = project.getAllPackageFragmentRoots();
            for (int i = 0; i < roots.length; i++) {
                if (!isJRELibrary(roots[i])) {
                    result.add(roots[i]);
                }
            }
        } catch (JavaModelException e) {
        }
        return (IPackageFragmentRoot[]) result.toArray(new IPackageFragmentRoot[result.size()]);
    }

    public static boolean isJRELibrary(IPackageFragmentRoot root) {
        try {
            IPath path = root.getRawClasspathEntry().getPath();
            if (path.equals(new Path(JavaRuntime.JRE_CONTAINER))
                    || path.equals(new Path(JavaRuntime.JRELIB_VARIABLE))) {
                return true;
            }
        } catch (JavaModelException e) {
        }
        return false;
    }

    /**
     * @param project
     * @return
     */
    public static String getJavaSourceLevel(IProject project) {
        return getJavaLevel(project, JavaCore.COMPILER_SOURCE);
    }

    /**
     * @param project
     * @return
     */
    public static String getJavaComplianceLevel(IProject project) {
        return getJavaLevel(project, JavaCore.COMPILER_COMPLIANCE);
    }

    /**
     * Precedence order from high to low:  (1) Project specific option;
     * (2) General preference option; (3) Default option; (4) Java 1.3
     * @param project
     * @param optionName
     * @return
     */
    public static String getJavaLevel(IProject project, String optionName) {
        // Returns the corresponding java project
        // No need to check for null, will return null      
        IJavaProject javaProject = JavaCore.create(project);
        String value = null;
        // Preferred to use the project
        if ((javaProject != null) && javaProject.exists()) {
            // Get the project specific option if one exists. Rolls up to the 
            // general preference option if no project specific option exists.
            value = javaProject.getOption(optionName, true);
            if (value != null) {
                return value;
            }
        }
        // Get the general preference option
        value = JavaCore.getJavaCore().getPluginPreferences().getString(optionName);
        if (value != null) {
            return value;
        }
        // Get the default option
        value = JavaCore.getOption(optionName);
        if (value != null) {
            return value;
        }
        // Return the default
        return JavaCore.VERSION_1_3;
    }

}