22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25 package jdk.internal.jrtfs;
26
27 import java.io.IOException;
28 import java.net.URISyntaxException;
29 import java.net.URL;
30 import java.nio.file.Files;
31 import java.nio.file.FileSystem;
32 import java.nio.file.FileSystems;
33 import java.nio.file.FileSystemNotFoundException;
34 import java.nio.file.Path;
35 import java.nio.file.Paths;
36 import java.security.AccessController;
37 import java.security.CodeSource;
38 import java.security.PrivilegedAction;
39
40 import jdk.internal.jimage.ImageReader;
41 import jdk.internal.jimage.ImageReader.Node;
42
43 /**
44 * @implNote This class needs to maintain JDK 8 source compatibility.
45 *
46 * It is used internally in the JDK to implement jimage/jrtfs access,
47 * but also compiled and delivered as part of the jrtfs.jar to support access
48 * to the jimage file provided by the shipped JDK by tools running on JDK 8.
49 */
50 @SuppressWarnings({ "removal", "suppression"} )
51 abstract class SystemImage {
52
53 abstract Node findNode(String path) throws IOException;
54 abstract byte[] getResource(Node node) throws IOException;
55 abstract void close() throws IOException;
56
57 static SystemImage open() throws IOException {
58 if (modulesImageExists) {
59 // open a .jimage and build directory structure
60 final ImageReader image = ImageReader.open(moduleImageFile);
61 return new SystemImage() {
62 @Override
63 Node findNode(String path) throws IOException {
64 return image.findNode(path);
65 }
66 @Override
67 byte[] getResource(Node node) throws IOException {
68 return image.getResource(node);
69 }
70 @Override
71 void close() throws IOException {
72 image.close();
73 }
74 };
75 }
76 if (Files.notExists(explodedModulesDir))
77 throw new FileSystemNotFoundException(explodedModulesDir.toString());
78 return new ExplodedImage(explodedModulesDir);
79 }
80
81 private static final String RUNTIME_HOME;
82 // "modules" jimage file Path
83 private static final Path moduleImageFile;
84 // "modules" jimage exists or not?
85 private static final boolean modulesImageExists;
86 // <JAVA_HOME>/modules directory Path
87 private static final Path explodedModulesDir;
88
89 static {
90 PrivilegedAction<String> pa = SystemImage::findHome;
91 RUNTIME_HOME = AccessController.doPrivileged(pa);
92
93 FileSystem fs = FileSystems.getDefault();
94 moduleImageFile = fs.getPath(RUNTIME_HOME, "lib", "modules");
95 explodedModulesDir = fs.getPath(RUNTIME_HOME, "modules");
96
97 modulesImageExists = AccessController.doPrivileged(
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22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25 package jdk.internal.jrtfs;
26
27 import java.io.IOException;
28 import java.net.URISyntaxException;
29 import java.net.URL;
30 import java.nio.file.Files;
31 import java.nio.file.FileSystem;
32 import java.nio.file.FileSystems;
33 import java.nio.file.FileSystemNotFoundException;
34 import java.nio.file.Path;
35 import java.nio.file.Paths;
36 import java.security.AccessController;
37 import java.security.CodeSource;
38 import java.security.PrivilegedAction;
39
40 import jdk.internal.jimage.ImageReader;
41 import jdk.internal.jimage.ImageReader.Node;
42 import jdk.internal.jimage.PreviewMode;
43
44 /**
45 * @implNote This class needs to maintain JDK 8 source compatibility.
46 *
47 * It is used internally in the JDK to implement jimage/jrtfs access,
48 * but also compiled and delivered as part of the jrtfs.jar to support access
49 * to the jimage file provided by the shipped JDK by tools running on JDK 8.
50 */
51 @SuppressWarnings({ "removal", "suppression"} )
52 abstract class SystemImage {
53
54 abstract Node findNode(String path) throws IOException;
55 abstract byte[] getResource(Node node) throws IOException;
56 abstract void close() throws IOException;
57
58 static SystemImage open(PreviewMode mode) throws IOException {
59 if (modulesImageExists) {
60 // open a .jimage and build directory structure
61 final ImageReader image = ImageReader.open(moduleImageFile, mode);
62 return new SystemImage() {
63 @Override
64 Node findNode(String path) throws IOException {
65 return image.findNode(path);
66 }
67 @Override
68 byte[] getResource(Node node) throws IOException {
69 return image.getResource(node);
70 }
71 @Override
72 void close() throws IOException {
73 image.close();
74 }
75 };
76 }
77
78 if (Files.notExists(explodedModulesDir))
79 throw new FileSystemNotFoundException(explodedModulesDir.toString());
80 // TODO: Support preview mode in ExplodedImage and remove this check.
81 if (mode.isPreviewModeEnabled())
82 throw new UnsupportedOperationException(
83 "Preview mode not yet supported for exploded images");
84 return new ExplodedImage(explodedModulesDir);
85 }
86
87 private static final String RUNTIME_HOME;
88 // "modules" jimage file Path
89 private static final Path moduleImageFile;
90 // "modules" jimage exists or not?
91 private static final boolean modulesImageExists;
92 // <JAVA_HOME>/modules directory Path
93 private static final Path explodedModulesDir;
94
95 static {
96 PrivilegedAction<String> pa = SystemImage::findHome;
97 RUNTIME_HOME = AccessController.doPrivileged(pa);
98
99 FileSystem fs = FileSystems.getDefault();
100 moduleImageFile = fs.getPath(RUNTIME_HOME, "lib", "modules");
101 explodedModulesDir = fs.getPath(RUNTIME_HOME, "modules");
102
103 modulesImageExists = AccessController.doPrivileged(
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