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

    }
    
    
    public void testReadOnlyFeatureSourceDataAccess() throws Exception {
        // build the mock up
        DataAccess da = createNiceMock(DataAccess.class);
        replay(da);
        FeatureSource fs = createNiceMock(FeatureSource.class);
        expect(fs.getDataStore()).andReturn(da);
        replay(fs);

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Examples of org.geotools.data.DataAccess

            catch(Exception e) {
                Throwables.propagateIfInstanceOf(e, IOException.class);
                Throwables.propagate(e);
            }


            DataAccess data = dataStore.getDataStore(null);


            FeatureSource source = data.getFeatureSource(resourceName);
            builder.setupBounds(ft, source);


            return builder.buildLayer(ft);
        }
        else if (store instanceof CoverageStoreInfo) {

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Examples of org.geotools.data.DataAccess

            store = info;
        }
        else {
            HashMap map = new HashMap(params.raw());
            Map resolved = ResourcePool.getParams(map, cat.getResourceLoader() );
            DataAccess dataStore = DataAccessFinder.getDataStore(resolved);            
            if( dataStore == null ){
                throw new IllegalArgumentException("Connection parameters incomplete (does not match an available data store, coverage store or wms store).");
            }
            DataStoreInfo info = factory.createDataStore();
            info.setWorkspace(workspace);
            info.setType(name);
            info.getConnectionParameters().putAll(map);
            try {
                info.setDescription( dataStore.getInfo().getDescription());
                info.setEnabled(true);
            } catch (Throwable e) {
                info.setError(e);
                info.setEnabled(false);
            }

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Examples of org.geotools.data.DataAccess

    private JSONObj resource(JSONObj obj, StoreInfo store, String name, HttpServletRequest req) throws IOException {
        obj.put("name", name);
        if(store instanceof DataStoreInfo){
            DataStoreInfo data = (DataStoreInfo) store;
            
            @SuppressWarnings("rawtypes")
            DataAccess dataStore = data.getDataStore(new NullProgressListener());
            FeatureType schema;
            org.geotools.data.ResourceInfo info;
            if (dataStore instanceof DataStore) {
                schema = ((DataStore) dataStore).getSchema(name);
                info = ((DataStore) dataStore).getFeatureSource(name).getInfo();
            } else {
                NameImpl qname = new NameImpl(name);
                schema = dataStore.getSchema(qname);
                info = dataStore.getFeatureSource(qname).getInfo();
            }
            String title = info.getTitle() == null
                    ? WordUtils.capitalize(name)
                    : info.getTitle();
            String description = info.getDescription() == null ? "" : info.getDescription();

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Examples of org.geotools.data.DataAccess

        URL url = getClass().getResource(schemaBase + "GeologicUnit.xml");
        assertNotNull(url);
        dsParams.put("dbtype", "app-schema");
        dsParams.put("url", url.toExternalForm());


        DataAccess guDataStore = DataAccessFinder.getDataStore(dsParams);
        assertNotNull(guDataStore);
        FeatureType geologicUnitType = guDataStore.getSchema(FeatureChainingTest.GEOLOGIC_UNIT);
        assertNotNull(geologicUnitType);


        url = getClass().getResource(schemaBase + "MappedFeaturePropertyfile.xml");
        assertNotNull(url);


        dsParams.put("dbtype", "app-schema");
        dsParams.put("url", url.toExternalForm());
        DataAccess mfDataAccess = DataAccessFinder.getDataStore(dsParams);
        assertNotNull(mfDataAccess);


        FeatureSource guSource = (FeatureSource) guDataStore
                .getFeatureSource(FeatureChainingTest.GEOLOGIC_UNIT);

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Examples of org.geotools.data.DataAccess

        }


        FeatureIterator<SimpleFeature> fi = null;
        try {
            // basic sanity checks on the datastore
            DataAccess ds = info.getVersioningDataStore().getDataStore(null);
            if (!(ds instanceof VersionedPostgisDataStore)) {
                throw new GSSException(
                        "The store attached to the gss module is not a PostGIS versioning one");
            }
            VersionedPostgisDataStore dataStore = (VersionedPostgisDataStore) ds;

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Examples of org.geotools.data.DataAccess

            if(virtualTable == null) {
                throw new IllegalArgumentException("The specified feature type does not have a sql view attached to it");
            }


            // get the store
            DataAccess da = store.getDataStore(null);
            if (!(da instanceof JDBCDataStore)) {
                error("Cannot create a SQL view if the store is not database based");
                setResponsePage(StorePage.class);
                return;
            }

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Examples of org.geotools.data.DataAccess

                DataStoreInfo meta = (DataStoreInfo) i.next();
                DataStore dataStore = null;
                
                // TODO: support locking for DataAccess
                if (meta.isEnabled()) {
                    DataAccess da = meta.getDataStore(null);
                    if ( da instanceof DataStore ) {
                        dataStore = (DataStore) da;
                    }
                }

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Examples of org.geotools.data.DataAccess

                DataStoreInfo meta = (DataStoreInfo) i.next();
                DataStore dataStore = null;
                
                // TODO: support locking for DataAccess
                if (meta.isEnabled()) {
                    DataAccess da = meta.getDataStore(null);
                    if ( da instanceof DataStore ) {
                        dataStore = (DataStore) da;
                    }
                }

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Examples of org.geotools.data.DataAccess

                DataStoreInfo meta = (DataStoreInfo) i.next();
                DataStore dataStore = null;
                
                // TODO: support locking for DataAccess
                if (meta.isEnabled()) {
                    DataAccess da = meta.getDataStore(null);
                    if ( da instanceof DataStore ) {
                        dataStore = (DataStore) da;
                    }
                }

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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.geotools.data.DataAccess

Examples of org.geotools.data.DataAccess

Examples of org.geotools.data.DataAccess

Examples of org.geotools.data.DataAccess

Examples of org.geotools.data.DataAccess

Examples of org.geotools.data.DataAccess

Examples of org.geotools.data.DataAccess

Examples of org.geotools.data.DataAccess