Examples of org.kiji.schema.KijiDataRequest

org.kiji.schema.KijiDataRequest
Describes a request for columns of data to read from a Kiji table.

KijiDataRequest objects are immutable. To create a KijiDataRequest, use the {@link #builder()} method to get a new {@link KijiDataRequestBuilder} object.Populate the object's fields, then call {@link KijiDataRequestBuilder#build()}.

For example, to request the 3 most recent versions of cell data from a column bar from the family foo within the time range [123, 456):
```
 KijiDataRequestBuilder builder = KijiDataRequest.builder() .withTimeRange(123L, 456L); builder.newColumnsDef().withMaxVersions(3).add("foo", "bar"); KijiDataRequest request = builder.build(); 
```
Or:
```
 KijiDataRequest dataRequest = KijiDataRequest.builder() .withTimeRange(123L, 456L) .addColumns(KijiDataRequestBuilder.ColumnsDef.create().withMaxVersions(3).add("foo", "bar")) .build(); 
```
For convenience, you can also build KijiDataRequests for a single cell using the KijiDataRequest.create() method:
```
 KijiDataRequest dataRequest = KijiDataRequest.create("info", "foo"); 
```
You cannot set any properties of the requested column using this syntax; for further customization, see {@link KijiDataRequestBuilder}.

  // Disabled by default.
  //@Test
  public void performanceTest() throws IOException {
    setupPerformanceTest();


    final KijiDataRequest request = KijiDataRequest.builder().addColumns(
        ColumnsDef.create().withMaxVersions(10000).add("map", null)).build();
    final HBaseKijiTable table =
        HBaseKijiTable.downcast(getKiji().openTable("row_data_test_table"));
    try {
      final HBaseKijiTableReader reader = (HBaseKijiTableReader) table.openTableReader();

View Full Code Here

  public void testDataRequestToScan() throws IOException {
    KijiDataRequestBuilder builder = KijiDataRequest.builder();
    builder.newColumnsDef().withMaxVersions(1).add("info", "name");
    builder.newColumnsDef().withMaxVersions(2).addFamily("purchases");
    builder.withTimeRange(1L, 3L);
    KijiDataRequest request = builder.build();


    Scan expectedScan = new Scan();
    HBaseColumnName hbaseColumn = mColumnNameTranslator.toHBaseColumnName(
        KijiColumnName.create("info:name"));
    expectedScan.addColumn(hbaseColumn.getFamily(), hbaseColumn.getQualifier());

View Full Code Here

    assertEquals(expectedScan.toString(), hbaseDataRequest.toScan(mTableLayout).toString());
  }


  @Test
  public void testDataRequestToScanEmpty() throws IOException {
    KijiDataRequest request = KijiDataRequest.builder().build();
    HBaseDataRequestAdapter hbaseDataRequest =
        new HBaseDataRequestAdapter(request, mColumnNameTranslator);
    assertFalse(hbaseDataRequest.toScan(mTableLayout).hasFamilies());
  }

View Full Code Here

  public void testDataRequestToGet() throws IOException {
    KijiDataRequestBuilder builder = KijiDataRequest.builder();
    builder.newColumnsDef().withMaxVersions(1).add("info", "name");
    builder.newColumnsDef().withMaxVersions(2).addFamily("purchases");
    builder.withTimeRange(1L, 3L);
    KijiDataRequest request = builder.build();


    EntityId entityId = mEntityIdFactory.getEntityId("entity");
    Get expectedGet = new Get(entityId.getHBaseRowKey());
    HBaseColumnName hbaseColumn = mColumnNameTranslator.toHBaseColumnName(
        KijiColumnName.create("info:name"));

View Full Code Here

        hbaseDataRequest.toGet(entityId, mTableLayout).toString());
  }


  @Test
  public void testDataRequestToGetEmpty() throws IOException {
    KijiDataRequest request = KijiDataRequest.builder().build();
    HBaseDataRequestAdapter hbaseDataRequest =
        new HBaseDataRequestAdapter(request, mColumnNameTranslator);
    assertFalse(
        hbaseDataRequest.toGet(mEntityIdFactory.getEntityId("entity"), mTableLayout).hasFamilies());
  }

View Full Code Here


    final KijiTable table = kiji.openTable("row_data_test_table");
    try {
      final KijiTableReader reader = table.openTableReader();
      try {
        final KijiDataRequest dataRequest = KijiDataRequest.builder()
            .addColumns(ColumnsDef.create()
                .withMaxVersions(1)
                .add("family", "qual0"))
            .addColumns(ColumnsDef.create()
                .withMaxVersions(2)

View Full Code Here


    final KijiTable table = kiji.openTable("row_data_test_table");
    try {
      final KijiTableReader reader = table.openTableReader();
      try {
        final KijiDataRequest dataRequest = KijiDataRequest.builder()
            .addColumns(ColumnsDef.create()
                .addFamily("family"))
            .build();
        final KijiRowData row = reader.get(table.getEntityId("row0"), dataRequest);
        assertEquals(1, row.getValues("family", "qual0").size());

View Full Code Here


    final KijiTable table = kiji.openTable("row_data_test_table");
    try {
      final KijiTableReader reader = table.openTableReader();
      try {
        final KijiDataRequest dataRequest = KijiDataRequest.builder()
            .addColumns(ColumnsDef.create()
                .withMaxVersions(HConstants.ALL_VERSIONS)
                .add("family", "qual0"))
            .addColumns(ColumnsDef.create()
                .withMaxVersions(HConstants.ALL_VERSIONS)

View Full Code Here


    final KijiTable table = kiji.openTable("row_data_test_table");
    try {
      final KijiTableReader reader = table.openTableReader();
      try {
        final KijiDataRequest dataRequest = KijiDataRequest.builder()
            .addColumns(ColumnsDef.create()
                .withMaxVersions(HConstants.ALL_VERSIONS)
                .withPageSize(1)
                .add("family", "qual0"))
            .addColumns(ColumnsDef.create()

View Full Code Here


    final KijiTable table = kiji.openTable("row_data_test_table");
    try {
      final KijiTableReader reader = table.openTableReader();
      try {
        final KijiDataRequest dataRequest = KijiDataRequest.builder()
            .addColumns(ColumnsDef.create()
                .withPageSize(1)
                .add("family", "qual0")
                .add("family", "qual1"))
            .build();

View Full Code Here

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