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Extracted the strategy for finding native library out of Native.

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This commit is contained in:
Adam Murdoch
2012-09-03 14:05:01 +10:00
parent 066a2be380
commit 67f057f6af
2 changed files with 69 additions and 47 deletions
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53
src/main/java/net/rubygrapefruit/platform/Native.java
View File

@@ -1,10 +1,10 @@
package net.rubygrapefruit.platform;
import net.rubygrapefruit.platform.internal.*;
import net.rubygrapefruit.platform.internal.NativeLibraryLocator;
import net.rubygrapefruit.platform.internal.Platform;
import net.rubygrapefruit.platform.internal.jni.NativeLibraryFunctions;
import java.io.*;
import java.net.URL;
import java.io.File;
/**
* Provides access to the native integrations. Use {@link #get(Class)} to load a particular integration.
@@ -27,30 +27,14 @@ public class Native {
if (!loaded) {
Platform platform = Platform.current();
try {
File libFile;
URL resource = Native.class.getClassLoader().getResource(platform.getLibraryName());
if (resource != null) {
File libDir = extractDir;
if (libDir == null) {
libDir = File.createTempFile("native-platform", "dir");
libDir.delete();
libDir.mkdirs();
}
libFile = new File(libDir, platform.getLibraryName());
libFile.deleteOnExit();
copy(resource, libFile);
} else {
libFile = new File("build/binaries/" + platform.getLibraryName());
}
if (!libFile.isFile()) {
File libFile = new NativeLibraryLocator(extractDir).find(platform.getLibraryName());
if (libFile == null) {
throw new NativeIntegrationUnavailableException(String.format("Native library is not available for this operating system and architecture."));
}
System.load(libFile.getCanonicalPath());
int nativeVersion = NativeLibraryFunctions.getVersion();
if (nativeVersion != NativeLibraryFunctions.VERSION) {
throw new NativeException(String.format(
"Unexpected native library version loaded. Expected %s, was %s.", nativeVersion,
NativeLibraryFunctions.VERSION));
throw new NativeException(String.format("Unexpected native library version loaded. Expected %s, was %s.", nativeVersion, NativeLibraryFunctions.VERSION));
}
loaded = true;
} catch (NativeException e) {
@@ -82,29 +66,4 @@ public class Native {
throw new NativeException(String.format("Failed to load native integration %s.", type.getSimpleName()), t);
}
}
private static void copy(URL source, File dest) {
try {
InputStream inputStream = source.openStream();
try {
OutputStream outputStream = new FileOutputStream(dest);
try {
byte[] buffer = new byte[4096];
while (true) {
int nread = inputStream.read(buffer);
if (nread < 0) {
break;
}
outputStream.write(buffer, 0, nread);
}
} finally {
outputStream.close();
}
} finally {
inputStream.close();
}
} catch (IOException e) {
throw new NativeException(String.format("Could not extract native JNI library."), e);
}
}
}

63
src/main/java/net/rubygrapefruit/platform/internal/NativeLibraryLocator.java Normal file
View File

@@ -0,0 +1,63 @@
package net.rubygrapefruit.platform.internal;
import net.rubygrapefruit.platform.NativeException;
import java.io.*;
import java.net.URL;
public class NativeLibraryLocator {
private final File extractDir;
public NativeLibraryLocator(File extractDir) {
this.extractDir = extractDir;
}
public File find(String libraryName) throws IOException {
File libFile;
URL resource = getClass().getClassLoader().getResource(libraryName);
if (resource != null) {
File libDir = extractDir;
if (libDir == null) {
libDir = File.createTempFile("native-platform", "dir");
libDir.delete();
libDir.mkdirs();
}
libFile = new File(libDir, libraryName);
libFile.deleteOnExit();
copy(resource, libFile);
return libFile;
}
libFile = new File("build/binaries/" + libraryName);
if (libFile.isFile()) {
return libFile;
}
return null;
}
private static void copy(URL source, File dest) {
try {
InputStream inputStream = source.openStream();
try {
OutputStream outputStream = new FileOutputStream(dest);
try {
byte[] buffer = new byte[4096];
while (true) {
int nread = inputStream.read(buffer);
if (nread < 0) {
break;
}
outputStream.write(buffer, 0, nread);
}
} finally {
outputStream.close();
}
} finally {
inputStream.close();
}
} catch (IOException e) {
throw new NativeException(String.format("Could not extract native JNI library."), e);
}
}
}