Examples of com.asakusafw.runtime.io.TsvEmitter

com.asakusafw.runtime.io.TsvEmitter

{@link ValueOption}の内容をTSV形式で出力する。

次のように利用する。

 Writer writer = ...; Iterator<SomeModel> models = ...; try { TsvEmitter emitter = new TsvEmitter(writer); while (models.hasNext();) { SomeModel model = models.next(); emitter.emit(model.getHogeOption()); emitter.emit(model.getFooOption()); emitter.emit(model.getBarOption()); emitter.endRecord(); } emitter.close(); } finally { writer.close(); }

特に指定がない限り、このクラスのメソッドの引数に {@code null}を指定した場合には {@link NullPointerException}がスローされる。

        ModelWrapper object = loader.newModel("Simple");
        DataOutputBuffer output = new DataOutputBuffer();
        ModelOutput<Object> modelOut = (ModelOutput<Object>) type.getAnnotation(ModelOutputLocation.class)
            .value()
            .getDeclaredConstructor(RecordEmitter.class)
            .newInstance(new TsvEmitter(new OutputStreamWriter(output, "UTF-8")));


        object.set("sid", 1L);
        object.set("value", new Text("hello"));
        modelOut.write(object.unwrap());


        DataOutputBuffer output = new DataOutputBuffer();
        ModelOutput<Object> modelOut = (ModelOutput<Object>) type.getAnnotation(ModelOutputLocation.class)
            .value()
            .getDeclaredConstructor(RecordEmitter.class)
            .newInstance(new TsvEmitter(new OutputStreamWriter(output, "UTF-8")));
        modelOut.write(object.unwrap());
        modelOut.write(object.unwrap());
        modelOut.write(object.unwrap());
        modelOut.close();

    @Override
    @Before
    public void setUp() throws Exception {
        super.setUp();
        this.buffer = new StringWriter();
        this.emitter = new TsvEmitter(buffer);
    }

Examples of com.asakusafw.runtime.io.TsvEmitter

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