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dbus-java-core/src/main/java/org/freedesktop/dbus/FileDescriptor.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,60 +1,94 @@ | ||
| package org.freedesktop.dbus; | ||
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|
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| import org.freedesktop.dbus.exceptions.MarshallingException; | ||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
| import org.freedesktop.dbus.spi.message.ISocketProvider; | ||
| import org.freedesktop.dbus.utils.ReflectionFileDescriptorHelper; | ||
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|
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| import java.lang.reflect.*; | ||
| import java.util.Optional; | ||
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| /** | ||
| * Represents a FileDescriptor to be passed over the bus. Can be created from | ||
| * either an integer(gotten through some JNI/JNA/JNR call) or from a | ||
| * java.io.FileDescriptor. | ||
| * | ||
| * Represents a FileDescriptor to be passed over the bus. <br> | ||
| * Can be created from either an integer (gotten through some JNI/JNA/JNR call) or from a | ||
| * {@link java.io.FileDescriptor}. | ||
| */ | ||
| public class FileDescriptor { | ||
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|
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| private final Logger logger = LoggerFactory.getLogger(getClass()); | ||
| public final class FileDescriptor { | ||
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| private final int fd; | ||
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| public FileDescriptor(int _fd) { | ||
| fd = _fd; | ||
| } | ||
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| public FileDescriptor(java.io.FileDescriptor _data) throws MarshallingException { | ||
| fd = getFileDescriptor(_data); | ||
| } | ||
| /** | ||
| * Converts this DBus {@link FileDescriptor} to a {@link java.io.FileDescriptor}.<br> | ||
| * Tries to use the provided ISocketProvider if present first. <br> | ||
| * If not present or conversion failed, tries to convert using reflection. | ||
| * | ||
| * @param _provider provider or null | ||
| * | ||
| * @return java file descriptor | ||
| * @throws MarshallingException when converting fails | ||
| */ | ||
| public java.io.FileDescriptor toJavaFileDescriptor(ISocketProvider _provider) throws MarshallingException { | ||
| if (_provider != null) { | ||
| Optional<java.io.FileDescriptor> result = _provider.createFileDescriptor(fd); | ||
| if (result.isPresent()) { | ||
| return result.get(); | ||
| } | ||
| } | ||
|
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| public java.io.FileDescriptor toJavaFileDescriptor() throws MarshallingException { | ||
| return createFileDescriptorByReflection(fd); | ||
| return ReflectionFileDescriptorHelper.getInstance() | ||
| .flatMap(helper -> helper.createFileDescriptor(fd)) | ||
| .orElseThrow(() -> new MarshallingException("Could not create new FileDescriptor instance")); | ||
| } | ||
|
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| public int getIntFileDescriptor() { | ||
| return fd; | ||
| } | ||
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| private int getFileDescriptor(java.io.FileDescriptor _data) throws MarshallingException { | ||
| Field declaredField; | ||
| try { | ||
| declaredField = _data.getClass().getDeclaredField("fd"); | ||
| declaredField.setAccessible(true); | ||
| return declaredField.getInt(_data); | ||
| } catch (NoSuchFieldException | SecurityException | IllegalArgumentException | IllegalAccessException _ex) { | ||
| logger.error("Could not get filedescriptor by reflection.", _ex); | ||
| throw new MarshallingException("Could not get member 'fd' of FileDescriptor by reflection!", _ex); | ||
| @Override | ||
| public boolean equals(Object _o) { | ||
| if (this == _o) { | ||
| return true; | ||
| } | ||
| if (_o == null || getClass() != _o.getClass()) { | ||
| return false; | ||
| } | ||
| FileDescriptor that = (FileDescriptor) _o; | ||
| return fd == that.fd; | ||
| } | ||
|
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| @Override | ||
| public int hashCode() { | ||
| return fd; | ||
| } | ||
|
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| private java.io.FileDescriptor createFileDescriptorByReflection(long _demarshallint) throws MarshallingException { | ||
| try { | ||
| Constructor<java.io.FileDescriptor> constructor = java.io.FileDescriptor.class.getDeclaredConstructor(int.class); | ||
| constructor.setAccessible(true); | ||
| return constructor.newInstance((int) _demarshallint); | ||
| } catch (NoSuchMethodException | SecurityException | InstantiationException | IllegalAccessException | ||
| | IllegalArgumentException | InvocationTargetException _ex) { | ||
| logger.error("Could not create new FileDescriptor instance by reflection.", _ex); | ||
| throw new MarshallingException("Could not create new FileDescriptor instance by reflection", _ex); | ||
| @Override | ||
| public String toString() { | ||
| return FileDescriptor.class.getSimpleName() + "[fd=" + fd + "]"; | ||
| } | ||
|
|
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| /** | ||
| * Utility method to create a DBus {@link FileDescriptor} from a {@link java.io.FileDescriptor}.<br> | ||
| * Tries to use the provided ISocketProvider if present first.<br> | ||
| * If not present or conversion failed, tries to convert using reflection. | ||
| * | ||
| * @param _data file descriptor | ||
| * @param _provider socket provider or null | ||
| * | ||
| * @return DBus FileDescriptor | ||
| * @throws MarshallingException when conversion fails | ||
| */ | ||
| public static FileDescriptor fromJavaFileDescriptor(java.io.FileDescriptor _data, ISocketProvider _provider) throws MarshallingException { | ||
| if (_provider != null) { | ||
| Optional<Integer> result = _provider.getFileDescriptorValue(_data); | ||
| if (result.isPresent()) { | ||
| return new FileDescriptor(result.get()); | ||
| } | ||
| } | ||
|
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| return new FileDescriptor(ReflectionFileDescriptorHelper.getInstance() | ||
| .flatMap(helper -> helper.getFileDescriptorValue(_data)) | ||
| .orElseThrow(() -> new MarshallingException("Could not get FileDescriptor value"))); | ||
| } | ||
| } |
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