1 files changed, 53 insertions, 0 deletions
diff --git a/examples/chunk_file_example.lua b/examples/chunk_file_example.lua
new file mode 100644
index 0000000..5961c98
--- /dev/null
+++ b/examples/chunk_file_example.lua
@@ -0,0 +1,53 @@
+-- To define a readable and writable chunk, one must define a class with the
+-- following methods: __init(id, global_conf), read(handle), write(handle),
+-- get_info(), set_info(info) and an id attribute. This file demonstrates a
+-- basic chunk implementation which manages the I/O of a matrix
+
+local MatrixChunk = nerv.class("nerv.MatrixChunk")
+
+function MatrixChunk:__init(id, global_conf)
+    self.id = id
+    self.info = {}
+    self.gconf = global_conf
+end
+
+function MatrixChunk:read(handle)
+    -- pass the read handle to the matrix method
+    self.data = nerv.MMatrixFloat.load(handle)
+end
+
+function MatrixChunk:write(handle)
+    -- pass the write handle to the matrix method
+    self.data:save(handle)
+end
+
+function MatrixChunk:get_info()
+    return self.info
+end
+
+function MatrixChunk:set_info(info)
+    self.info = info
+end
+
+function MatrixChunk.create_from_matrix(id, mat)
+    local ins = nerv.MatrixChunk(id)
+    ins.data = mat
+    return ins
+end
+
+mat = nerv.MMatrixFloat(3, 4)
+for i = 0, 2 do
+    for j = 0, 3 do
+        mat[i][j] = i + j
+    end
+end
+
+cd = nerv.MatrixChunk.create_from_matrix("matrix1", mat)
+
+cf = nerv.ChunkFile("test.nerv", "w")
+cf:write_chunk(cd)
+cf:close()
+
+cf2 = nerv.ChunkFile("test.nerv", "r")
+cd2 = cf2:read_chunk("matrix1")
+print(cd2.data)