glassfish/weld/WeldCompositeSniffer.java

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 * obtain a copy of the License at
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package org.glassfish.weld;

import static org.glassfish.weld.WeldUtils.JAR_SUFFIX;
import static org.glassfish.weld.WeldUtils.META_INF_BEANS_XML;
import static org.glassfish.weld.WeldUtils.SEPARATOR_CHAR;

import java.io.IOException;
import java.util.Enumeration;

import org.glassfish.api.container.CompositeSniffer;
import org.glassfish.api.deployment.DeploymentContext;
import org.glassfish.api.deployment.archive.ReadableArchive;
import org.glassfish.javaee.core.deployment.ApplicationHolder;
import org.jvnet.hk2.annotations.Scoped;
import org.jvnet.hk2.annotations.Service;
import org.jvnet.hk2.component.Singleton;


/**
 * This sniffer determines if there are any beans.xml at the ear level.
 */
@Service(name = "weldCompositeSniffer")
@Scoped(Singleton.class)
public class WeldCompositeSniffer extends WeldSniffer implements CompositeSniffer {

    public boolean handles(DeploymentContext context) {
        boolean isWeldApplication = false;
        ApplicationHolder holder = context.getModuleMetaData(ApplicationHolder.class);
        ReadableArchive appRoot = context.getSource();
        if ((holder != null) && (holder.app != null)) {
            isWeldApplication = scanLibDir(appRoot, holder.app.getLibraryDirectory(), context);
        }
        return isWeldApplication;
    }

    // This method returns true if at least one /lib jar is a Weld archive
    // A more thorough scan is done in WeldDeployer to extract all Weld archives
    // under the /lib directory.

    private boolean scanLibDir(ReadableArchive archive, String libLocation, DeploymentContext context) {
        boolean entryPresent = false;
        if (libLocation != null && !libLocation.isEmpty()) {
            Enumeration<String> entries = archive.entries(libLocation);
            while (entries.hasMoreElements() && !entryPresent) {
                String entryName = entries.nextElement();
                // if a jar in lib dir and not WEB-INF/lib/foo/bar.jar
                if (entryName.endsWith(JAR_SUFFIX) &&
                    entryName.indexOf(SEPARATOR_CHAR, libLocation.length() + 1 ) == -1 ) {
                    try {
                        ReadableArchive jarInLib = archive.getSubArchive(entryName);
                        entryPresent = isEntryPresent(jarInLib, META_INF_BEANS_XML);
                        jarInLib.close();
                        if (entryPresent) break;
                    } catch (IOException e) {
                    }
                }
            }
        }
        return entryPresent;
    }

    private boolean isEntryPresent(ReadableArchive archive, String entry) {
        boolean entryPresent = false;
        try {
            entryPresent = archive.exists(entry);
        } catch (IOException e) {
            // ignore
        }
        return entryPresent;
    }
}