Examples of KijiRowData

org.kiji.schema.KijiRowData
the value stored in the column named 'info:name' with a timestamp of 42. final String name = row.getValue("info", "name", 42L);
We also provide additional methods for accessing data stored withing a row. See the documentation below for methods with the name 'get*' for more information.

Checking for existence of cells

Since rows within a Kiji table may not contain all the columns defined within a layout we need a way to check this in code. KijiRowData contains several methods to help with this:
```
  final KijiRowData row = myTableReader.get(myEntityId, myDataRequest); if (row.containsColumn("info", "name")) { // Now that we know the cell exists, read the value. final String name = row.getMostRecentValue("info", "name"); } if (row.containsCell("info", "name", 42L)) { // Now that we know that this cell exists at the timestamp of 42. final String name = row.getValue("info", "name", 42L); }  
```
Dealing with large rows

Rows in Kiji tables may contain large amounts of data. In some cases, this is caused by storing many versions of a cell with different timestamps in a row. This can become a problem when the size of a row/cell exceeds the amount of RAM available. To deal with large rows, you may use paging through a {@link KijiPager}. When paging is enabled on a column, cells from that column may only be accessed through {@link #getPager(String)} and {@link #getPager(String,String)}. See the documentation for {@link KijiPager} for more information.

Examples of org.kiji.schema.KijiRowData

        new KijiPaginationFilter(new RegexQualifierColumnFilter("b"), 1);
    final KijiDataRequestBuilder builder = KijiDataRequest.builder();
    builder.newColumnsDef().withMaxVersions(5).withFilter(columnFilter).addFamily("jobs");
    final KijiDataRequest dataRequest = builder.build();
    EntityId meId = mTable.getEntityId(Bytes.toBytes("me"));
    KijiRowData myRowData = mReader.get(meId, dataRequest);
    final NavigableMap<String, NavigableMap<Long, CharSequence>> resultMap
        = myRowData.<CharSequence>getValues("jobs");
    assertEquals("The number of returned values is incorrect: ", 1, resultMap.get("b").size());
    assertEquals("Incorrect first value of first page:", "always coming in 3rd",
        resultMap.get("b").get(3L).toString());
  }

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Examples of org.kiji.schema.KijiRowData

          final KijiDataRequest dataRequest = KijiDataRequest.builder()
              .addColumns(ColumnsDef.create()
                  .withMaxVersions(HConstants.ALL_VERSIONS)
                  .addFamily("info"))
              .build();
          final KijiRowData row = reader.get(eid, dataRequest);
          assertEquals(2, row.getValues("info", "name").size());
          assertEquals(2, row.getValues("info", "email").size());
        }


        // Test FirstKeyOnly filter when applied on the group-type family.
        {
          final KijiDataRequest dataRequest = KijiDataRequest.builder()
              .addColumns(ColumnsDef.create()
                  .withMaxVersions(HConstants.ALL_VERSIONS)
                  .withFilter(new KijiFirstKeyOnlyColumnFilter())
                  .addFamily("info"))
              .build();
          final KijiRowData row = reader.get(eid, dataRequest);
          assertEquals(1, row.getValues("info", "name").size());
          assertEquals(1, row.getValues("info", "email").size());
        }


        // Test FirstKeyOnly filter when applied on a single column.
        // Make sure it doesn't affect other columns.
        {
          final KijiDataRequest dataRequest = KijiDataRequest.builder()
              .addColumns(ColumnsDef.create()
                  .withMaxVersions(HConstants.ALL_VERSIONS)
                  .withFilter(new KijiFirstKeyOnlyColumnFilter())
                  .add("info", "name"))
              .addColumns(ColumnsDef.create()
                  .withMaxVersions(HConstants.ALL_VERSIONS)
                  .add("info", "email"))
              .build();
          final KijiRowData row = reader.get(eid, dataRequest);
          assertEquals(1, row.getValues("info", "name").size());
          assertEquals(2, row.getValues("info", "email").size());
        }


        // Test FirstKeyOnly filter when applied on a single column.
        // Make sure it doesn't affect other columns.
        {
          final KijiDataRequest dataRequest = KijiDataRequest.builder()
              .addColumns(ColumnsDef.create()
                  .withMaxVersions(HConstants.ALL_VERSIONS)
                  .add("info", "name"))
              .addColumns(ColumnsDef.create()
                  .withMaxVersions(HConstants.ALL_VERSIONS)
                  .withFilter(new KijiFirstKeyOnlyColumnFilter())
                  .add("info", "email"))
              .build();
          final KijiRowData row = reader.get(eid, dataRequest);
          assertEquals(2, row.getValues("info", "name").size());
          assertEquals(1, row.getValues("info", "email").size());
        }


      } finally {
        reader.close();
      }

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Examples of org.kiji.schema.KijiRowData

    final KijiTable table = kiji.openTable("table");
    final KijiTableReader reader = table.openTableReader();


    // Verify the first row.
    final KijiDataRequest req = KijiDataRequest.create("family", "column");
    final KijiRowData row1 = reader.get(table.getEntityId("row1"), req);
    assertEquals("foo2", row1.getValue("family", "column", 2).toString());


    // Verify the second row.
    final KijiRowData row2 = reader.get(table.getEntityId("row2"), req);
    assertEquals("foo3", row2.getValue("family", "column", 100).toString());


    ResourceUtils.closeOrLog(reader);
    ResourceUtils.releaseOrLog(table);
  }

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Examples of org.kiji.schema.KijiRowData

            hbaseGet, Debug.toDebugString(hbaseGet.getFilter()));
      }
      final Result result = doHBaseGet(hbaseGet);
      LOG.debug("Got {} cells over {} requested", result.size(), pageSize);


      final KijiRowData page =
          // No cell is being decoded here so we don't need a cell decoder provider:
          new HBaseKijiRowData(mTable, nextPageDataRequest, mEntityId, result, null);


      // There is an HBase bug that leads to less KeyValue being returned than expected.
      // An empty result appears to be a reliable way to detect the end of the iteration.
      if (result.isEmpty()) {
        mHasNext = false;
      } else {
        // Update the low qualifier bound for the next iteration:
        mMinQualifier = page.getQualifiers(mFamily.getFamily()).last();
      }


      return page;


    } catch (IOException ioe) {

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Examples of org.kiji.schema.KijiRowData

                      .withMaxVersions(2)
                      .add("family", "column"))
              .build();


          // Try this as a get.
          KijiRowData rowData = mReader.get(mEntityId, dataRequest);
          String s = rowData.getValue("family", "column", 0L).toString();
          assertEquals(s, "Value at timestamp 0.");


          // Delete the cell and make sure that this value is missing.
          mWriter.deleteCell(mEntityId, "family", "column", 0L);


          rowData = mReader.get(mEntityId, dataRequest);
          assertFalse(rowData.containsCell("family", "column", 0L));
        } finally {
          mWriter.close();
        }
      } finally {
        mReader.close();

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Examples of org.kiji.schema.KijiRowData

    final KijiTable table = getKiji().openTable("table");
    try {
      final EntityId eid = table.getEntityId("row");
      final KijiTableReader reader = table.openTableReader();
      try {
        final KijiRowData normalData = reader.get(eid, normalRequest);
        final EmptyRecord emptyRecord = normalData.getMostRecentValue("family", "empty");


        final KijiRowData overrideData = reader.get(table.getEntityId("row"), overrideRequest);
        final TestRecord1 record1 = overrideData.getMostRecentValue("family", "empty");
        assertEquals(Integer.valueOf(-1), record1.getInteger());
      } finally {
        reader.close();
      }
    } finally {

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Examples of org.kiji.schema.KijiRowData

      final EntityId eid = table.getEntityId("row");
      final KijiTableReader reader = table.getReaderFactory().readerBuilder()
          .withOnDecoderCacheMiss(OnDecoderCacheMiss.FAIL).buildAndOpen();
      try {
        try {
          final KijiRowData data = reader.get(table.getEntityId("row"), request);
          final TestRecord1 record1 = data.getMostRecentValue("family", "empty");
          fail("Should have thrown DecoderNotFoundException");
        } catch (DecoderNotFoundException dnfe) {
          assertTrue(dnfe.getMessage().startsWith(
              "Could not find cell decoder for BoundColumnReaderSpec: "));
        }

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Examples of org.kiji.schema.KijiRowData

          .withOnDecoderCacheMiss(OnDecoderCacheMiss.FAIL)
          .withColumnReaderSpecOverrides(ImmutableMap.of(
              EMPTY, ColumnReaderSpec.avroReaderSchemaSpecific(TestRecord1.class)))
          .buildAndOpen();
      try {
        final KijiRowData normalData = reader.get(eid, normalRequest);
        final TestRecord1 record1 = normalData.getMostRecentValue("family", "empty");
        assertEquals(Integer.valueOf(-1), record1.getInteger());


        final KijiRowData overrideData = reader.get(eid, overrideRequest);
        final TestRecord1 record1b = overrideData.getMostRecentValue("family", "empty");
        assertEquals(Integer.valueOf(-1), record1b.getInteger());
      } finally {
        reader.close();
      }
    } finally {

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Examples of org.kiji.schema.KijiRowData

      final KijiTableReader reader = table.getReaderFactory().readerBuilder()
          .withOnDecoderCacheMiss(OnDecoderCacheMiss.FAIL)
          .withColumnReaderSpecAlternatives(alts)
          .buildAndOpen();
      try {
        final KijiRowData normalData = reader.get(eid, normalRequest);
        final EmptyRecord emptyRecord = normalData.getMostRecentValue("family", "empty");


        final KijiRowData overrideData = reader.get(eid, overrideRequest);
        final TestRecord1 record1 = overrideData.getMostRecentValue("family", "empty");
        assertEquals(Integer.valueOf(-1), record1.getInteger());
      } finally {
        reader.close();
      }
    } finally {

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Examples of org.kiji.schema.KijiRowData

    mWriter.put(mEntityId, FAMILY, QUALIFIER, TIMESTAMP, VALUE);


    final KijiDataRequest dataRequest = KijiDataRequest.create(FAMILY, QUALIFIER);


    // The data should be there now!
    KijiRowData rowData = mReader.get(mEntityId, dataRequest);
    String s = rowData.getValue(FAMILY, QUALIFIER, TIMESTAMP).toString();
    assertEquals(s, VALUE);


    // Wait for ten seconds.
    Thread.sleep(10 * 1000);


    rowData = mReader.get(mEntityId, dataRequest);
    assertFalse(rowData.containsCell(FAMILY, QUALIFIER, TIMESTAMP));
  }

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Examples of KijiRowData

Checking for existence of cells

Dealing with large rows

Examples of org.kiji.schema.KijiRowData

Examples of org.kiji.schema.KijiRowData

Examples of org.kiji.schema.KijiRowData

Examples of org.kiji.schema.KijiRowData

Examples of org.kiji.schema.KijiRowData

Examples of org.kiji.schema.KijiRowData

Examples of org.kiji.schema.KijiRowData

Examples of org.kiji.schema.KijiRowData

Examples of org.kiji.schema.KijiRowData

Examples of org.kiji.schema.KijiRowData