FlightSim-Streaming/XPlaneConnectCSP
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Added support for sending multiple datarefs to the Java client.

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This commit is contained in:
Jason Watkins
2015-05-07 15:05:29 -07:00
parent 5717b0f67a
commit e0c0f2f6bd
2 changed files with 81 additions and 27 deletions
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81
Java/src/XPlaneConnect.java
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@@ -331,43 +331,70 @@ public class XPlaneConnect implements AutoCloseable
* @throws IOException If the command cannot be sent.
*/
public void sendDREF(String dref, float[] value) throws IOException
{
sendDREFs(new String[] {dref}, new float[][] {value});
}
/**
* Sends a command to X-Plane that sets the given DREF.
*
* @param drefs The names of the X-Plane datarefs to set.
* @param values A sequence of arrays of floating point values whose structure depends on the drefs specified.
* @throws IOException If the command cannot be sent.
*/
public void sendDREFs(String[] drefs, float[][] values) throws IOException
{
//Preconditions
if(dref == null)
if(drefs == null || drefs.length == 0)
{
throw new IllegalArgumentException("dref must be a valid string.");
throw new IllegalArgumentException(("drefs must be non-empty."));
}
if(value == null || value.length == 0)
if(values == null || values.length != drefs.length)
{
throw new IllegalArgumentException("value must be non-null and should contain at least one value.");
throw new IllegalArgumentException("values must be of the same size as drefs.");
}
//Convert drefs to bytes.
byte[] drefBytes = dref.getBytes(StandardCharsets.UTF_8);
if(drefBytes.length == 0)
{
throw new IllegalArgumentException("DREF is an empty string!");
}
if(drefBytes.length > 255)
{
throw new IllegalArgumentException("dref must be less than 255 bytes in UTF-8. Are you sure this is a valid dref?");
}
ByteBuffer bb = ByteBuffer.allocate(4 * value.length);
bb.order(ByteOrder.LITTLE_ENDIAN);
for(int i = 0; i < value.length; ++i)
{
bb.putFloat(i * 4, value[i]);
}
//Build and send message
ByteArrayOutputStream os = new ByteArrayOutputStream();
os.write("DREF".getBytes(StandardCharsets.UTF_8));
os.write(0xFF); //Placeholder for message length
os.write(drefBytes.length);
os.write(drefBytes, 0, drefBytes.length);
os.write(value.length);
os.write(bb.array());
for(int i = 0; i < drefs.length; ++i)
{
String dref = drefs[i];
float[] value = values[i];
if (dref == null)
{
throw new IllegalArgumentException("dref must be a valid string.");
}
if (value == null || value.length == 0)
{
throw new IllegalArgumentException("value must be non-null and should contain at least one value.");
}
//Convert drefs to bytes.
byte[] drefBytes = dref.getBytes(StandardCharsets.UTF_8);
if (drefBytes.length == 0)
{
throw new IllegalArgumentException("DREF is an empty string!");
}
if (drefBytes.length > 255)
{
throw new IllegalArgumentException("dref must be less than 255 bytes in UTF-8. Are you sure this is a valid dref?");
}
ByteBuffer bb = ByteBuffer.allocate(4 * value.length);
bb.order(ByteOrder.LITTLE_ENDIAN);
for (int j = 0; j < value.length; ++j)
{
bb.putFloat(j * 4, value[j]);
}
//Build and send message
os.write(drefBytes.length);
os.write(drefBytes, 0, drefBytes.length);
os.write(value.length);
os.write(bb.array());
}
sendUDP(os.toByteArray());
}