Add OutputStream::Flush

Author: dlunch

java_runtime/src/classes/java/io/data_output_stream.rs

@@ -24,6 +24,7 @@ impl DataOutputStream {
                 JavaMethodProto::new("writeLong", "(J)V", Self::write_long, Default::default()),
                 JavaMethodProto::new("writeChars", "(Ljava/lang/String;)V", Self::write_chars, Default::default()),
                 JavaMethodProto::new("close", "()V", Self::close, Default::default()),
+                JavaMethodProto::new("flush", "()V", Self::flush, Default::default()),
             ],
             fields: vec![JavaFieldProto::new("out", "Ljava/io/OutputStream;", Default::default())],
         }
@@ -93,6 +94,15 @@ impl DataOutputStream {
 
         Ok(())
     }
+
+    async fn flush(jvm: &Jvm, _: &mut RuntimeContext, this: ClassInstanceRef<Self>) -> Result<()> {
+        tracing::debug!("java.io.DataInputStream::flush({:?})", &this);
+
+        let out = jvm.get_field(&this, "out", "Ljava/io/OutputStream;").await?;
+        let _: () = jvm.invoke_virtual(&out, "flush", "()V", []).await?;
+
+        Ok(())
+    }
 }
 
 #[cfg(test)]

java_runtime/src/classes/java/io/output_stream.rs

@@ -19,6 +19,7 @@ impl OutputStream {
                 JavaMethodProto::new("write", "([B)V", Self::write_bytes, Default::default()),
                 JavaMethodProto::new("write", "([BII)V", Self::write_bytes_offset, Default::default()),
                 JavaMethodProto::new_abstract("write", "(I)V", Default::default()),
+                JavaMethodProto::new("flush", "()V", Self::flush, Default::default()),
             ],
             fields: vec![],
         }
@@ -60,4 +61,10 @@ impl OutputStream {
 
         Ok(())
     }
+
+    async fn flush(_jvm: &Jvm, _: &mut RuntimeContext, this: ClassInstanceRef<Self>) -> Result<()> {
+        tracing::debug!("java.io.OutputStream::flush({:?})", &this);
+
+        Ok(())
+    }
 }