org.glassfish.jersey.server.internal.scanning.VfsSchemeResourceFinderFactory Maven / Gradle / Ivy

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package org.glassfish.jersey.server.internal.scanning;

import java.io.FilterInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URI;
import java.net.URL;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;

import javax.ws.rs.core.UriBuilder;

import org.glassfish.jersey.server.ResourceFinder;

/**
 * A JBoss-based "vfsfile", "vfs" and "vfszip" scheme URI scanner.
 *
 * @author Paul Sandoz
 */
class VfsSchemeResourceFinderFactory implements UriSchemeResourceFinderFactory {

    public Set getSchemes() {
        return new HashSet(Arrays.asList("vfsfile", "vfszip", "vfs"));
    }

    VfsSchemeResourceFinderFactory() {
    }

    @Override
    public VfsSchemeScanner create(final URI uri, boolean recursive) {
        ResourceFinderStack resourceFinderStack = new ResourceFinderStack();

        if (!uri.getScheme().equalsIgnoreCase("vfszip")) {
            resourceFinderStack.push(
                    new FileSchemeResourceFinderFactory().create(UriBuilder.fromUri(uri).scheme("file").build(), true));
        } else {
            final String su = uri.toString();
            final int webInfIndex = su.indexOf("/WEB-INF/classes");
            if (webInfIndex != -1) {
                final String war = su.substring(0, webInfIndex);
                final String path = su.substring(webInfIndex + 1);

                final int warParentIndex = war.lastIndexOf('/');
                final String warParent = su.substring(0, warParentIndex);

                // Check is there is a war within an ear
                // If so we need to load the ear then obtain the InputStream
                // of the entry to the war
                if (warParent.endsWith(".ear")) {
                    final String warName = su.substring(warParentIndex + 1, war.length());
                    try {

                        final JarFileScanner jarFileScanner =
                                new JarFileScanner(new URL(warParent.replace("vfszip", "file")).openStream(), "", true);

                        while (jarFileScanner.hasNext()) {
                            if (jarFileScanner.next().equals(warName)) {

                                resourceFinderStack.push(new JarFileScanner(new FilterInputStream(jarFileScanner.open()) {
                                    // This is required so that the underlying ear
                                    // is not closed

                                    @Override
                                    public void close() throws IOException {
                                    }
                                }, "", true));
                            }
                        }

                    } catch (IOException e) {
                        throw new ResourceFinderException("IO error when scanning war " + uri, e);
                    }
                } else {
                    try {
                        resourceFinderStack.push(
                                new JarFileScanner(new URL(war.replace("vfszip", "file")).openStream(), path, recursive));
                    } catch (IOException e) {
                        throw new ResourceFinderException("IO error when scanning war " + uri, e);
                    }
                }
            } else {
                try {
                    resourceFinderStack.push(new JarFileScanner(new URL(su).openStream(), "", true));
                } catch (IOException e) {
                    throw new ResourceFinderException("IO error when scanning jar " + uri, e);
                }
            }
        }

        return new VfsSchemeScanner(resourceFinderStack);
    }

    private class VfsSchemeScanner implements ResourceFinder {

        private final ResourceFinderStack resourceFinderStack;

        private VfsSchemeScanner(final ResourceFinderStack resourceFinderStack) {
            this.resourceFinderStack = resourceFinderStack;
        }

        @Override
        public boolean hasNext() {
            return resourceFinderStack.hasNext();
        }

        @Override
        public String next() {
            return resourceFinderStack.next();
        }

        @Override
        public void remove() {
            resourceFinderStack.next();
        }

        @Override
        public InputStream open() {
            return resourceFinderStack.open();
        }

        @Override
        public void reset() {
            resourceFinderStack.reset();
        }
    }
}