org.hibernate.eclipse.console.workbench.ProjectCompilerVersionChecker.java Source code

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Here is the source code for org.hibernate.eclipse.console.workbench.ProjectCompilerVersionChecker.java

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/*******************************************************************************
 * Copyright (c) 2012 Red Hat, Inc.
 * Distributed under license by Red Hat, Inc. All rights reserved.
 * This program is 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
 *
 * Contributor:
 *     Red Hat, Inc. - initial API and implementation
 ******************************************************************************/
package org.hibernate.eclipse.console.workbench;

import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.JavaCore;
import org.eclipse.jdt.internal.compiler.classfmt.ClassFileConstants;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.osgi.util.NLS;
import org.eclipse.swt.widgets.Display;
import org.hibernate.console.ConsoleConfiguration;
import org.hibernate.eclipse.console.utils.ProjectUtils;

/**
 * @author Dmitry Geraskov (geraskov@gmail.com)
 *
 */
@SuppressWarnings("restriction")
public class ProjectCompilerVersionChecker {

    /**
     * 
     * @param ccfg
     * @return false if Projects jdk version is bigger than Eclipse jdk version
     */
    public static boolean validateProjectComplianceLevel(final ConsoleConfiguration ccfg) {
        IJavaProject[] javaProjects = ProjectUtils.findJavaProjects(ccfg);
        if (javaProjects.length > 0) {
            for (final IJavaProject iJavaProject : javaProjects) {
                if (iJavaProject.exists()) {
                    String projectTarget = iJavaProject.getOption(JavaCore.COMPILER_CODEGEN_TARGET_PLATFORM, true);
                    String eclipseCompilerVersion = System.getProperty("java.specification.version"); //$NON-NLS-1$
                    long projectJdkLevel = versionToJdkLevel(projectTarget);
                    long eclipseJdkLevel = versionToJdkLevel(eclipseCompilerVersion);
                    if (eclipseJdkLevel < projectJdkLevel) {
                        Display.getDefault().syncExec(new Runnable() {
                            @Override
                            public void run() {
                                MessageDialog.openWarning(null, Messages.ProjectCompilerVersionChecker_title,
                                        NLS.bind(Messages.ProjectCompilerVersionChecker_message,
                                                iJavaProject.getElementName()));
                            }
                        });
                        return false;
                    }
                }
            }
        }
        return true;
    }

    private static final String VERSION_JSR14 = "jsr14"; //$NON-NLS-1$
    private static final String VERSION_CLDC1_1 = "cldc1.1"; //$NON-NLS-1$

    private static long versionToJdkLevel(Object versionID) {
        if (versionID instanceof String) {
            String version = (String) versionID;
            // verification is optimized for all versions with same length and same "1." prefix
            if (version.length() == 3 && version.charAt(0) == '1' && version.charAt(1) == '.') {
                switch (version.charAt(2)) {
                case '1':
                    return ClassFileConstants.JDK1_1;
                case '2':
                    return ClassFileConstants.JDK1_2;
                case '3':
                    return ClassFileConstants.JDK1_3;
                case '4':
                    return ClassFileConstants.JDK1_4;
                case '5':
                    return ClassFileConstants.JDK1_5;
                case '6':
                    return ClassFileConstants.JDK1_6;
                case '7':
                    return ClassFileConstants.JDK1_7;
                case '8':
                    return ClassFileConstants.JDK1_8;
                default:
                    return 0; // unknown
                }
            }
            if (VERSION_JSR14.equals(versionID)) {
                return ClassFileConstants.JDK1_4;
            }
            if (VERSION_CLDC1_1.equals(versionID)) {
                return ClassFileConstants.CLDC_1_1;
            }
        }
        return 0; // unknown
    }

}