19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package jdk.nio.zipfs;
27
28 import java.io.IOException;
29 import java.io.InputStream;
30 import java.nio.file.Path;
31 import java.util.Arrays;
32 import java.util.HashMap;
33 import java.util.Map;
34 import java.util.TreeMap;
35 import java.util.function.Consumer;
36 import java.util.function.Function;
37 import java.util.jar.Attributes;
38 import java.util.jar.Manifest;
39
40 /**
41 * Adds aliasing to ZipFileSystem to support multi-release jar files. An alias map
42 * is created by {@link JarFileSystem#createVersionedLinks(int)}. The map is then
43 * consulted when an entry is looked up in {@link JarFileSystem#getEntry(byte[])}
44 * to determine if the entry has a corresponding versioned entry. If so, the
45 * versioned entry is returned.
46 *
47 * @author Steve Drach
48 */
49
50 class JarFileSystem extends ZipFileSystem {
51 private Function<byte[],byte[]> lookup;
52
53 @Override
54 Entry getEntry(byte[] path) throws IOException {
55 // check for an alias to a versioned entry
56 byte[] versionedPath = lookup.apply(path);
57 return versionedPath == null ? super.getEntry(path) : super.getEntry(versionedPath);
58 }
59
60 JarFileSystem(ZipFileSystemProvider provider, Path zfpath, Map<String,?> env)
61 throws IOException {
62 super(provider, zfpath, env);
63 lookup = path -> path; // lookup needs to be set before isMultiReleaseJar is called
64 // because it eventually calls getEntry
65 if (isMultiReleaseJar()) {
66 int version;
67 Object o = env.get("multi-release");
68 if (o instanceof String) {
69 String s = (String)o;
70 if (s.equals("runtime")) {
71 version = sun.misc.Version.jdkMajorVersion(); // fixme waiting for jdk.util.Version
72 } else {
73 version = Integer.parseInt(s);
74 }
75 } else if (o instanceof Integer) {
76 version = (Integer)o;
77 } else if (false /*o instanceof Version*/) { // fixme waiting for jdk.util.Version
78 // version = ((Version)o).major();
79 } else {
80 throw new IllegalArgumentException("env parameter must be String, Integer, "
81 + "or Version");
82 }
83 lookup = createVersionedLinks(version < 0 ? 0 : version);
84 setReadOnly();
85 }
86 }
87
88 private boolean isMultiReleaseJar() {
89 try (InputStream is = newInputStream(getBytes("META-INF/MANIFEST.MF"))) {
90 return (new Manifest(is)).getMainAttributes()
91 .containsKey(new Attributes.Name("Multi-Release"));
92 // fixme change line above after JarFile integration to contain Attributes.Name.MULTI_RELEASE
93 } catch (IOException x) {
94 return false;
95 }
96 }
97
98 /**
|
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package jdk.nio.zipfs;
27
28 import java.io.IOException;
29 import java.io.InputStream;
30 import java.nio.file.Path;
31 import java.util.Arrays;
32 import java.util.HashMap;
33 import java.util.Map;
34 import java.util.TreeMap;
35 import java.util.function.Consumer;
36 import java.util.function.Function;
37 import java.util.jar.Attributes;
38 import java.util.jar.Manifest;
39 import jdk.Version;
40
41 /**
42 * Adds aliasing to ZipFileSystem to support multi-release jar files. An alias map
43 * is created by {@link JarFileSystem#createVersionedLinks(int)}. The map is then
44 * consulted when an entry is looked up in {@link JarFileSystem#getEntry(byte[])}
45 * to determine if the entry has a corresponding versioned entry. If so, the
46 * versioned entry is returned.
47 *
48 * @author Steve Drach
49 */
50
51 class JarFileSystem extends ZipFileSystem {
52 private Function<byte[],byte[]> lookup;
53
54 @Override
55 Entry getEntry(byte[] path) throws IOException {
56 // check for an alias to a versioned entry
57 byte[] versionedPath = lookup.apply(path);
58 return versionedPath == null ? super.getEntry(path) : super.getEntry(versionedPath);
59 }
60
61 JarFileSystem(ZipFileSystemProvider provider, Path zfpath, Map<String,?> env)
62 throws IOException {
63 super(provider, zfpath, env);
64 lookup = path -> path; // lookup needs to be set before isMultiReleaseJar is called
65 // because it eventually calls getEntry
66 if (isMultiReleaseJar()) {
67 int version;
68 Object o = env.get("multi-release");
69 if (o instanceof String) {
70 String s = (String)o;
71 if (s.equals("runtime")) {
72 version = jdk.Version.current().major();
73 } else {
74 version = Integer.parseInt(s);
75 }
76 } else if (o instanceof Integer) {
77 version = (Integer)o;
78 } else if (o instanceof Version) {
79 version = ((Version)o).major();
80 } else {
81 throw new IllegalArgumentException("env parameter must be String, Integer, "
82 + "or Version");
83 }
84 lookup = createVersionedLinks(version < 0 ? 0 : version);
85 setReadOnly();
86 }
87 }
88
89 private boolean isMultiReleaseJar() {
90 try (InputStream is = newInputStream(getBytes("META-INF/MANIFEST.MF"))) {
91 return (new Manifest(is)).getMainAttributes()
92 .containsKey(new Attributes.Name("Multi-Release"));
93 // fixme change line above after JarFile integration to contain Attributes.Name.MULTI_RELEASE
94 } catch (IOException x) {
95 return false;
96 }
97 }
98
99 /**
|