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}.

  }


  /** {@inheritDoc} */
  @Override
  public KijiDataRequest getDataRequest() {
    KijiDataRequest dataRequest = KijiDataRequest.builder().build();
    for (KijiRowFilter filter : mFilters) {
      if (filter != null) {
        dataRequest = dataRequest.merge(filter.getDataRequest());
      }
    }
    return dataRequest;
  }

View Full Code Here

  // -----------------------------------------------------------------------------------------------
  // Test cases that need to interact with an actual Kiji table.


  @Test
  public void testEntityId() throws Exception {
    final KijiDataRequest dataRequest = KijiDataRequest.builder()
        .addColumns(ColumnsDef.create().add(FAMILY, QUAL0))
        .build();


    // Put some data into the table.
    mWriter.put(mEntityId, FAMILY, QUAL0, Bytes.toBytes("bot"));

View Full Code Here

    // Put some data into the table.
    mWriter.put(mEntityId, FAMILY, QUAL3, 1L, 42);


    KijiDataRequestBuilder builder = KijiDataRequest.builder();
    builder.newColumnsDef().add(FAMILY, QUAL3);
    KijiDataRequest dataRequest = builder.build();


    // Read out the results to get a KijiRowData
    final KijiRowData input = mReader.get(mEntityId, dataRequest);


    assertNotNull(input.getMostRecentValue(FAMILY, QUAL3));

View Full Code Here

  }


  @Test
  public void testGetReaderSchema() throws Exception {
    // Empty data request.
    final KijiDataRequest dataRequest = KijiDataRequest.builder().build();


    // Read data for an entity ID that does not exist.
    final KijiRowData input = mReader.get(mEntityId, dataRequest);


    assertEquals(Schema.create(Schema.Type.STRING), input.getReaderSchema("family", "empty"));

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    assertEquals(Schema.create(Schema.Type.INT), input.getReaderSchema("family", "qual3"));
  }


  @Test
  public void testGetReaderSchemaNoSuchColumn() throws Exception {
    final KijiDataRequest dataRequest = KijiDataRequest.builder().build();


    // Read data for an entity ID that does not exist.
    final KijiRowData input = mReader.get(mEntityId, dataRequest);


    try {

View Full Code Here


    mWriter.put(mEntityId, "family", "qual2", 3L, "q2-three");
    mWriter.put(mEntityId, "family", "qual2", 4L, "q2-four");
    mWriter.put(mEntityId, "family", "qual2", 6L, "q2-six");


    final KijiDataRequest dataRequest = KijiDataRequest.builder()
        .withTimeRange(2L, 7L)
        .addColumns(ColumnsDef.create().add("family", "qual0"))
        .addColumns(ColumnsDef.create().withMaxVersions(2).add("family", "qual1"))
        .addColumns(ColumnsDef.create().withMaxVersions(3).add("family", "qual2"))
        .build();

View Full Code Here

    // TODO: Test having results for a family, but not for a particular qualifier.
    // TODO: Test not having results for family or qualifier.
    mWriter.put(mEntityId, "family", "qual0", 1L, "string1");
    mWriter.put(mEntityId, "family", "qual0", 2L, "string2");


    final KijiDataRequest dataRequest = KijiDataRequest.builder()
        .addColumns(ColumnsDef.create().add("family", "qual1"))
        .build();


    final KijiRowData row1 = mReader.get(mEntityId, dataRequest);

View Full Code Here

  public void testGetMap() throws Exception {
    // Put some data into the table.
    mWriter.put(mEntityId, FAMILY, QUAL0, "bot");
    mWriter.put(mEntityId, FAMILY, EMPTY, "car");


    final KijiDataRequest dataRequest = KijiDataRequest.builder().build();


    // We didn't request any data, so the map should be null.
    final KijiRowData input = mReader.get(mEntityId, dataRequest);
  }

View Full Code Here

    mWriter.put(mEntityId, MAP, KEY1, 1L, 1);
    mWriter.put(mEntityId, MAP, KEY2, 1L, 2);
    mWriter.put(mEntityId, FAMILY, QUAL0, 1L, "string1");
    mWriter.put(mEntityId, FAMILY, QUAL0, 2L, "string2");


    final KijiDataRequest dataRequest = KijiDataRequest.builder()
        .addColumns(ColumnsDef.create().withMaxVersions(1).addFamily(MAP))
        .build();


    final KijiRowData row1 = mReader.get(mEntityId, dataRequest);
    final Iterator<KijiCell<Integer>> cells = row1.iterator(MAP);

View Full Code Here

  public void testIteratorMapFamilyMaxVersionsTypes() throws IOException {
    mWriter.put(mEntityId, MAP, KEY0, 1L, 0);
    mWriter.put(mEntityId, MAP, KEY0, 2L, 1);
    mWriter.put(mEntityId, MAP, KEY0, 3L, 2);


    final KijiDataRequest dataRequest = KijiDataRequest.builder()
        .addColumns(ColumnsDef.create().withMaxVersions(2).addFamily("map"))
        .build();


    final KijiRowData row1 = mReader.get(mEntityId, dataRequest);
    final Iterator<KijiCell<Integer>> cells = row1.iterator(MAP);

View Full Code Here

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