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[#5171] Ensure NioDatagramChannelConfig can be instanced on android

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Motivation:

NioDatagramChannelConfig currently uses NetworkChannel in its static { } block and so fails to init on android which not has this class.

Modifications:

Use reflection to load the NetworkChannel.class

Result:

Be able to use NIO Datagram on android as well.
This commit is contained in:
Norman Maurer 2016-05-02 14:33:47 +02:00
parent c745ac0e16
commit b2bb72b2de
1 changed files with 21 additions and 11 deletions
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32
transport/src/main/java/io/netty/channel/socket/nio/NioDatagramChannelConfig.java
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@ -25,7 +25,6 @@ import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.nio.channels.DatagramChannel;
import java.nio.channels.NetworkChannel;
import java.util.Enumeration;
/**
@ -78,16 +77,28 @@ class NioDatagramChannelConfig extends DefaultDatagramChannelConfig {
throw new Error("cannot locate the IP_MULTICAST_LOOP field", e);
}
Class<?> networkChannelClass = null;
try {
getOption = NetworkChannel.class.getDeclaredMethod("getOption", socketOptionType);
} catch (Exception e) {
throw new Error("cannot locate the getOption() method", e);
networkChannelClass = Class.forName("java.nio.channels.NetworkChannel", true, classLoader);
} catch (Throwable ignore) {
// Not Java 7+
}
try {
setOption = NetworkChannel.class.getDeclaredMethod("setOption", socketOptionType, Object.class);
} catch (Exception e) {
throw new Error("cannot locate the setOption() method", e);
if (networkChannelClass == null) {
getOption = null;
setOption = null;
} else {
try {
getOption = networkChannelClass.getDeclaredMethod("getOption", socketOptionType);
} catch (Exception e) {
throw new Error("cannot locate the getOption() method", e);
}
try {
setOption = networkChannelClass.getDeclaredMethod("setOption", socketOptionType, Object.class);
} catch (Exception e) {
throw new Error("cannot locate the setOption() method", e);
}
}
}
IP_MULTICAST_TTL = ipMulticastTtl;
@ -173,7 +184,7 @@ class NioDatagramChannelConfig extends DefaultDatagramChannelConfig {
}
private Object getOption0(Object option) {
if (PlatformDependent.javaVersion() < 7) {
if (GET_OPTION == null) {
throw new UnsupportedOperationException();
} else {
try {
@ -185,7 +196,7 @@ class NioDatagramChannelConfig extends DefaultDatagramChannelConfig {
}
private void setOption0(Object option, Object value) {
if (PlatformDependent.javaVersion() < 7) {
if (SET_OPTION == null) {
throw new UnsupportedOperationException();
} else {
try {
@ -195,5 +206,4 @@ class NioDatagramChannelConfig extends DefaultDatagramChannelConfig {
}
}
}
}