org.eclipse.virgo.nano.war.deployer/src/main/java/org/eclipse/virgo/nano/war/deployer/WebBundleUtils.java

package org.eclipse.virgo.nano.war.deployer;

import org.eclipse.gemini.web.internal.WebContainerUtils;
import org.eclipse.virgo.util.osgi.manifest.BundleManifest;
import org.osgi.framework.Constants;

public class WebBundleUtils {
	
    /**
     * Determines whether the given manifest represents a web application bundle. According to the R4.2 Enterprise
     * Specification, this is true if and only if the manifest contains any of the headers in Table 128.3:
     * Bundle-SymbolicName, Bundle-Version, Bundle-ManifestVersion, Import-Package, Web-ContextPath. Note: there is no
     * need to validate the manifest as if it is invalid it will cause an error later.
     * 
     * @param manifest the bundle manifest
     * @return <code>true</code> if and only if the given manifest represents a web application bundle
     */
    public static boolean isWebApplicationBundle(BundleManifest manifest) {
        return specifiesBundleSymbolicName(manifest) || specifiesBundleVersion(manifest) || specifiesBundleManifestVersion(manifest)
            || specifiesImportPackage(manifest) || specifiesWebContextPath(manifest);
    }

    private static boolean specifiesBundleSymbolicName(BundleManifest manifest) {
        return manifest.getBundleSymbolicName().getSymbolicName() != null;
    }

    private static boolean specifiesBundleVersion(BundleManifest manifest) {
        return manifest.getHeader(Constants.BUNDLE_VERSION) != null;
    }

    private static boolean specifiesBundleManifestVersion(BundleManifest manifest) {
        return manifest.getBundleManifestVersion() != 1;
    }

    private static boolean specifiesImportPackage(BundleManifest manifest) {
        return !manifest.getImportPackage().getImportedPackages().isEmpty();
    }

    private static boolean specifiesWebContextPath(BundleManifest manifest) {
        return manifest.getHeader(WebContainerUtils.HEADER_WEB_CONTEXT_PATH) != null;
    }
}