Add Java Input/Output Stream wrappers to ceylon.interop.java

[qdzo]

There are sometimes need to use Java's InputStream and OutputStream, and it will be good to have some ceylon's wrappers on them.

There are similar interfaces in SDK :

• ceylon.buffer.readers.Reader
• ceylon.io.WritableFileDescriptor
• ceylon.io.ReadableFileDescriptor

and there are some suitable candidates for java-to-ceylon way.

• ceylon.io.impl.InputStreamAdapter
• ceylon.io.impl.OutputStreamAdapter

But need an opposite way ceylon->java.

Something like that

class CeylonInputStream(ByteBuffer buffer) extends InputStream() {
    assert (is JavaByteBuffer implementation = buffer.implementation);
    shared actual Integer read() {
        try {
            return implementation.get().unsigned;
        }
        catch (BufferUnderflowException e) {
            return -1;
        }
    }
}

class CeylonOutputStream(ByteBuffer buffer) extends OutputStream() {
    assert (is JavaByteBuffer implementation = buffer.implementation);
    shared actual void write(Integer b) {
        try {
            implementation.put(b.byte);
        }
        catch (BufferOverflowException e){
        }
    }
}

What do you think about this?

[qdzo]

Or simpler

class CeylonInputStream(ByteBuffer buffer) extends InputStream() {
    
    shared actual Integer read() {
        try {
            return buffer.get().unsigned;
        }
        catch (BufferUnderflowException e) {
            return -1;
        }
    }
}

class CeylonOutputStream(ByteBuffer buffer) extends OutputStream() {

   shared actual void write(Integer b) {
        try {
            buffer.put(b.byte);
        }
        catch (BufferOverflowException e){
        }
    }
}