Examples of DataAccess

net.canarymod.database.DataAccess
Handle the layout and creation of tables @author Chris (damagefilter)
net.paoding.rose.jade.dataaccess.DataAccess
{@link DataAccess} 分隔了DAO接口层和数据访问层。
数据访问层规范定义了所支持的数据访问接口 @author 王志亮 [qieqie.wang@gmail.com] @author 廖涵 [in355hz@gmail.com]
org.geotools.data.DataAccess
This is the top-level interface for access to {@code FeatureData}.

Description
The DataAccess interface provides the following information about its contents:
- {@link DataAccess.getInfo()} - information about the file or server itself
- {@link DataAccess.getNames()} - list of the available contents (each is an individual resource)
- {@link DataAccess.getSchema( Name )} - FeatureType describing the information available in the named resource
Contents
You can access the contents of a service or file using getFeatureSource( Name ). Depending the abilities of your implementation and your credentials you will have access to
- {@link FeatureSource}: read-only api similar to the WFS getFeature operations. Please note the reutrned FeatureCollection may be *lazy*; for many implementations no actual access will occur until you use the FetaureCollection for the first time.
- {@link FeatureStore}: read/write api similar to the WFS Transaction operation. Batch changes such as addFeatures, modifyFeatures and removeFeatures are supported.
- {@link FeatureLocking}: concurrency control; the Data Access API is thread safe; one consequence of this is modifications being held up while other threads read the contents. You may wish to Lock a selection of features for your exclusive use. Locks are timed; and will expire after the indicated period.
Please note that all interaction occurs within the context of a Transaction, this facility provides session management and is strongly advised. Please note that your application is responsible for managing its own Transactions; as an example they are often associated with a single Map in a desktop application; or a single session in a J2EE web app.
The use of Transaction.AUTO_COMMIT is suitable for read-only access when you wish to minimize the number of connections in use, when used for writing performance will often be terrible.
Lifecycle
Normal use:
- Connect using a DataAccessFactory.createDataStore using a set of connection parameters
- Application is responsible for holding a single instance to the service or file, DataAccess implementations will hold onto database connections, internal caches and so on - and as such should not be duplicated.
- DataAccess.dispose() is called when the application is shut down
Creation:
- Created using a DataAccessFactory.createNewDataStore using a set of creation parameters
- DataAccess.createSchema( T ) is called to set up the contents
- DataAccess.getFetaureSource( Name ) is called, and FeatureStore.addFeatures( collection ) used to populate the contents
- DataAccess.dispose() is called when the application is shut down
Applications are responsible for holding a single instance to the service or file, The DataAccess implementations will hold onto database connections, internal caches and so on - and as such should not be duplicated. @see DataStore Subclass restricted to working with simple content @param < T> Type of Feature Content, may be SimpleFeatureType @param < F> Feature Content, may be SimpleFetaure @source $URL$
org.tmatesoft.hg.internal.DataAccess
relevant parts of DataInput, non-stream nature (seek operation), explicit check for end of data. convenient skip (+/- bytes) Primary goal - effective file read, so that clients don't need to care whether to call few distinct getInt() or readBytes(totalForFewInts) and parse themselves instead in an attempt to optimize. @author Artem Tikhomirov @author TMate Software Ltd.

Examples of org.geotools.data.DataAccess

        DataAccessFactory f = getGeoServer().getCatalog().getResourcePool().getDataStoreFactory(info);
        
        assertNotNull( f );
        assertTrue( f instanceof PropertyDataStoreFactory );
        
        DataAccess store = getGeoServer().getCatalog().getResourcePool().getDataStore(info);
                
        assertEquals( testDS.toURI().toString().toLowerCase(), store.getInfo().getSource().toString().replace("/./", "/").toLowerCase());
    }

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Examples of org.geotools.data.DataAccess

    @SuppressWarnings("rawtypes")
    @Test
    public void testPutWithCalculation() throws Exception {
        DataStoreInfo dataStoreInfo = getCatalog().getDataStoreByName("sf","sf");
        String dataStoreId = dataStoreInfo.getId();
        DataAccess dataAccessBefore = dataStoreInfo.getDataStore(null);
        assertSame("ResourcePool DataStoreCache", dataAccessBefore, getCatalog().getResourcePool().getDataStoreCache().get( dataStoreId ));
        
        String clearLatLonBoundingBox =
              "<featureType>"
                + "<nativeBoundingBox>"
                  + "<minx>-180.0</minx>" + "<maxx>180.0</maxx>"
                  + "<miny>-90.0</miny>" + "<maxy>90.0</maxy>"
                  + "<crs>EPSG:4326</crs>" 
                + "</nativeBoundingBox>"
                + "<latLonBoundingBox/>"
            + "</featureType>";
        
        String path = "/rest/workspaces/sf/datastores/sf/featuretypes/PrimitiveGeoFeature";
        MockHttpServletResponse response =
                putAsServletResponse(path, clearLatLonBoundingBox, "text/xml");
        assertEquals("Couldn't remove lat/lon bounding box:\n" + response.getOutputStreamContent(),
                200, response.getStatusCode());


        Document dom = getAsDOM(path + ".xml");
        assertXpathEvaluatesTo("0.0", "/featureType/latLonBoundingBox/minx", dom);
        
        // confirm ResourcePoool cache of DataStore is unchanged
        DataAccess dataAccessAfter = getCatalog().getDataStoreByName("sf","sf").getDataStore(null);
        assertSame( "ResourcePool DataStoreCache check 1", dataAccessBefore, dataAccessAfter );
        assertSame("ResourcePool DataStoreCache", dataAccessBefore, getCatalog().getResourcePool().getDataStoreCache().get( dataStoreId ));
        
        String updateNativeBounds =
                "<featureType>"

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Examples of org.tmatesoft.hg.internal.DataAccess

    bundleFile = bundle;
    fnDecorer = Internals.buildFileNameEncodingHelper(new SessionContext.SourcePrim(ctx));
  }


  private DataAccess getDataStream() throws IOException {
    DataAccess da = accessProvider.createReader(bundleFile, false);
    byte[] signature = new byte[6];
    if (da.length() > 6) {
      da.readBytes(signature, 0, 6);
      if (signature[0] == 'H' && signature[1] == 'G' && signature[2] == '1' && signature[3] == '0') {
        if (signature[4] == 'G' && signature[5] == 'Z') {
          return new InflaterDataAccess(da, 6, da.length() - 6);
        }
        if (signature[4] == 'B' && signature[5] == 'Z') {
          throw Internals.notImplemented();
        }
        if (signature[4] != 'U' || signature[5] != 'N') {
          throw new HgInvalidStateException(String.format("Bad bundle signature: %s",  String.valueOf(signature)));
        }
        // "...UN", fall-through
      } else {
        da.reset();
      }
    }
    return da;
  }

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Examples of org.tmatesoft.hg.internal.DataAccess

  public void inspectChangelog(Inspector inspector) throws HgIOException, HgRuntimeException {
    if (inspector == null) {
      throw new IllegalArgumentException();
    }
    final Lifecycle lifecycle = lifecycleSetUp(inspector);
    DataAccess da = null;
    try {
      da = getDataStream();
      internalInspectChangelog(da, inspector);
    } catch (IOException ex) {
      throw new HgIOException("Failed to inspect changelog in the bundle", ex, bundleFile);
    } finally {
      if (da != null) {
        da.done();
      }
      lifecycleTearDown(lifecycle);
    }
  }

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Examples of org.tmatesoft.hg.internal.DataAccess

  public void inspectManifest(Inspector inspector) throws HgIOException, HgRuntimeException {
    if (inspector == null) {
      throw new IllegalArgumentException();
    }
    final Lifecycle lifecycle = lifecycleSetUp(inspector);
    DataAccess da = null;
    try {
      da = getDataStream();
      if (da.isEmpty()) {
        return;
      }
      skipGroup(da); // changelog
      internalInspectManifest(da, inspector);
    } catch (IOException ex) {
      throw new HgIOException("Failed to inspect manifest in the bundle", ex, bundleFile);
    } finally {
      if (da != null) {
        da.done();
      }
      lifecycleTearDown(lifecycle);
    }
  }

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Examples of org.tmatesoft.hg.internal.DataAccess

  public void inspectFiles(Inspector inspector) throws HgIOException, HgRuntimeException {
    if (inspector == null) {
      throw new IllegalArgumentException();
    }
    final Lifecycle lifecycle = lifecycleSetUp(inspector);
    DataAccess da = null;
    try {
      da = getDataStream();
      if (da.isEmpty()) {
        return;
      }
      skipGroup(da); // changelog
      if (da.isEmpty()) {
        return;
      }
      skipGroup(da); // manifest
      internalInspectFiles(da, inspector);
    } catch (IOException ex) {
      throw new HgIOException("Failed to inspect files in the bundle", ex, bundleFile);
    } finally {
      if (da != null) {
        da.done();
      }
      lifecycleTearDown(lifecycle);
    }
  }

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Examples of org.tmatesoft.hg.internal.DataAccess

  public void inspectAll(Inspector inspector) throws HgIOException, HgRuntimeException {
    if (inspector == null) {
      throw new IllegalArgumentException();
    }
    final Lifecycle lifecycle = lifecycleSetUp(inspector);
    DataAccess da = null;
    try {
      da = getDataStream();
      internalInspectChangelog(da, inspector);
      if (flowControl.isStopped()) {
        return;
      }
      internalInspectManifest(da, inspector);
      if (flowControl.isStopped()) {
        return;
      }
      internalInspectFiles(da, inspector);
    } catch (IOException ex) {
      throw new HgIOException("Failed to inspect bundle", ex, bundleFile);
    } finally {
      if (da != null) {
        da.done();
      }
      lifecycleTearDown(lifecycle);
    }
  }

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Examples of org.tmatesoft.hg.internal.DataAccess

      byte[] nb = new byte[80];
      da.readBytes(nb, 0, 80);
      int dataLength = len - 84 /* length field + 4 nodeids */;
      byte[] data = new byte[dataLength];
      da.readBytes(data, 0, dataLength);
      DataAccess slice = new ByteArrayDataAccess(data); // XXX in fact, may pass a slicing DataAccess.
      // Just need to make sure that we seek to proper location afterwards (where next GroupElement starts),
      // regardless whether that slice has read it or not.
      GroupElement ge = new GroupElement(nb, prevNodeid, slice);
      good2go = inspector.element(ge);
      slice.done(); // BADA doesn't implement done(), but it could (e.g. free array) 
      /// and we'd better tell it we are not going to use it any more. However, it's important to ensure Inspector
      // implementations out there do not retain GroupElement.rawData()
      prevNodeid = ge.node();
      len = da.isEmpty() ? 0 : da.readInt();
    }

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Examples of org.tmatesoft.hg.internal.DataAccess

        boolean writeComplete = false;
        Nodeid deltaBase = ge.patchBase();
        if (deltaBase.isNull()) {
          // NOTE, can't use both parents isNull == true to empty prevRevContent
          // see build.gradle sample below why.
          prevRevContent = new DataAccess(); // empty data
          writeComplete = true;
          // if (writeComplete) would set baseRevision correctly,
        } else {
          Nodeid prevRevision = revisionSequence.size() > 0 ? revisionSequence.get(revisionSequence.size()-1) : Nodeid.NULL;
          if (!prevRevision.equals(deltaBase)) {

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Examples of org.tmatesoft.hg.internal.DataAccess

    return new ByteArrayDataAccess(bos.toByteArray());
  }
  
  @Test
  public void testSeek() throws Exception {
    DataAccess zip = zip(testContent1);
    InflaterDataAccess ida = new InflaterDataAccess(zip, 0, zip.length(), -1, new Inflater(), new byte[25], null);
    ida.seek(20);
    final int bufferCapacity = 10;
    ByteBuffer chunk1 = ByteBuffer.allocate(bufferCapacity);
    ida.readBytes(chunk1);
    errorCollector.assertTrue(new ByteArraySlice(testContent1, 20, bufferCapacity).equalsTo(chunk1.array()));

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Examples of DataAccess

Description

Contents

Lifecycle

Examples of org.geotools.data.DataAccess

Examples of org.geotools.data.DataAccess

Examples of org.tmatesoft.hg.internal.DataAccess

Examples of org.tmatesoft.hg.internal.DataAccess

Examples of org.tmatesoft.hg.internal.DataAccess

Examples of org.tmatesoft.hg.internal.DataAccess

Examples of org.tmatesoft.hg.internal.DataAccess

Examples of org.tmatesoft.hg.internal.DataAccess

Examples of org.tmatesoft.hg.internal.DataAccess

Examples of org.tmatesoft.hg.internal.DataAccess