コード例 #1
0
  FeatureId addFeature(
      SimpleFeature feature, FeatureWriter<SimpleFeatureType, SimpleFeature> writer)
      throws IOException {
    // grab next feature and populate it
    // JD: worth a note on how we do this... we take a "pull" approach
    // because the raw schema we are inserting into may not match the
    // schema of the features we are inserting
    SimpleFeature toWrite = writer.next();
    for (int i = 0; i < toWrite.getType().getAttributeCount(); i++) {
      String name = toWrite.getType().getDescriptor(i).getLocalName();
      toWrite.setAttribute(name, feature.getAttribute(name));
    }

    // copy over the user data
    if (feature.getUserData().size() > 0) {
      toWrite.getUserData().putAll(feature.getUserData());
    }

    // pass through the fid if the user asked so
    boolean useExisting = Boolean.TRUE.equals(feature.getUserData().get(Hints.USE_PROVIDED_FID));
    if (getQueryCapabilities().isUseProvidedFIDSupported() && useExisting) {
      ((FeatureIdImpl) toWrite.getIdentifier()).setID(feature.getID());
    }

    // perform the write
    writer.write();

    // copy any metadata from the feature that was actually written
    feature.getUserData().putAll(toWrite.getUserData());

    // add the id to the set of inserted
    FeatureId id = toWrite.getIdentifier();
    return id;
  }
コード例 #2
0
 /**
  * Utility method that ensures we are going to write only in append mode
  *
  * @return
  * @throws IOException
  */
 private FeatureWriter<SimpleFeatureType, SimpleFeature> getWriterAppend() throws IOException {
   FeatureWriter<SimpleFeatureType, SimpleFeature> writer = getWriter(Filter.INCLUDE, WRITER_ADD);
   while (writer.hasNext()) {
     writer.next();
   }
   return writer;
 }
コード例 #3
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  protected void modifyFeatures(
      AttributeDescriptor[] type,
      Object[] value,
      FeatureWriter<SimpleFeatureType, SimpleFeature> writer)
      throws DataSourceException, IOException {
    SimpleFeature feature;
    try {
      while (writer.hasNext()) {
        feature = writer.next();

        for (int i = 0; i < type.length; i++) {
          try {
            feature.setAttribute(type[i].getLocalName(), value[i]);
          } catch (IllegalAttributeException e) {
            throw new DataSourceException(
                "Could not update feature "
                    + feature.getID()
                    + " with "
                    + type[i].getLocalName()
                    + "="
                    + value[i],
                e);
          }
        }

        writer.write();
      }
    } finally {
      writer.close();
    }
  }
コード例 #4
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  /**
   * Sets the feature of the source.
   *
   * <p>This method operates by first clearing the contents of the feature store ({@link
   * #removeFeatures(Filter)}), and then obtaining an appending feature writer and writing all
   * features from <tt>reader</tt> to it.
   */
  public final void setFeatures(FeatureReader<SimpleFeatureType, SimpleFeature> reader)
      throws IOException {
    // remove features
    removeFeatures(Filter.INCLUDE);

    // grab a feature writer for insert
    FeatureWriter<SimpleFeatureType, SimpleFeature> writer = getWriter(Filter.INCLUDE, WRITER_ADD);
    try {
      while (reader.hasNext()) {
        SimpleFeature feature = reader.next();

        // grab next feature and populate it
        // JD: worth a note on how we do this... we take a "pull" approach
        // because the raw schema we are inserting into may not match the
        // schema of the features we are inserting
        SimpleFeature toWrite = writer.next();
        for (int i = 0; i < toWrite.getType().getAttributeCount(); i++) {
          String name = toWrite.getType().getDescriptor(i).getLocalName();
          toWrite.setAttribute(name, feature.getAttribute(name));
        }

        // perform the write
        writer.write();
      }
    } finally {
      writer.close();
    }
  }
コード例 #5
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  public List<FeatureId> addFeatures(FeatureCollection<SimpleFeatureType, SimpleFeature> collection)
      throws IOException {
    List<FeatureId> addedFids = new LinkedList<FeatureId>();
    String typeName = getSchema().getTypeName();
    SimpleFeature feature = null;
    SimpleFeature newFeature;
    FeatureWriter<SimpleFeatureType, SimpleFeature> writer =
        getDataStore().getFeatureWriterAppend(typeName, getTransaction());

    Iterator iterator = collection.iterator();
    try {

      while (iterator.hasNext()) {
        feature = (SimpleFeature) iterator.next();
        newFeature = (SimpleFeature) writer.next();
        try {
          newFeature.setAttributes(feature.getAttributes());
        } catch (Exception writeProblem) {
          throw new DataSourceException(
              "Could not create " + typeName + " out of provided feature: " + feature.getID(),
              writeProblem);
        }

        // preserve the FID, it could come from another node
        ((MutableFIDFeature) newFeature).setID(feature.getID());

        writer.write();
        addedFids.add(newFeature.getIdentifier());
      }
    } finally {
      collection.close(iterator);
      writer.close();
    }
    return addedFids;
  }
コード例 #6
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  public List<FeatureId> addFeatures(FeatureCollection<SimpleFeatureType, SimpleFeature> collection)
      throws IOException {
    List<FeatureId> addedFids = new LinkedList<FeatureId>();
    String typeName = getSchema().getTypeName();
    SimpleFeature feature = null;
    SimpleFeature newFeature;
    FeatureWriter<SimpleFeatureType, SimpleFeature> writer =
        getDataStore().getFeatureWriterAppend(typeName, getTransaction());

    Iterator iterator = collection.iterator();
    try {
      while (iterator.hasNext()) {
        try {
          feature = (SimpleFeature) iterator.next();
        } catch (Exception e) {
          throw new DataSourceException("Could not add Features, problem with provided reader", e);
        }

        newFeature = (SimpleFeature) writer.next();

        try {
          // JD: we may have a case that the source feature type does not
          // match exactly the target feature type, so build attributes
          // based oin target
          // newFeature.setAttributes(feature.getAttributes(null));
          Object[] attributes = new Object[newFeature.getAttributeCount()];
          for (int i = 0; i < attributes.length; i++) {
            AttributeDescriptor type = newFeature.getFeatureType().getDescriptor(i);
            attributes[i] = feature.getAttribute(type.getLocalName());
          }
          newFeature.setAttributes(attributes);

        } catch (IllegalAttributeException writeProblem) {
          throw new DataSourceException(
              "Could not create " + typeName + " out of provided feature: " + feature.getID(),
              writeProblem);
        }

        writer.write();
        addedFids.add(newFeature.getIdentifier());
      }
    } finally {
      collection.close(iterator);
      writer.close();
    }

    return addedFids;
  }
コード例 #7
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  /**
   * Removes features indicated by provided filter.
   *
   * <p>Equivelent to:
   *
   * <pre><code>
   * FeatureWriter<SimpleFeatureType, SimpleFeature> writer = dataStore.getFeatureWriter( typeName, filter, transaction );
   * Feature feature;
   * while( writer.hasNext() ){
   *    feature = writer.next();
   *    writer.remove();
   * }
   * writer.close();
   * </code>
   * </pre>
   *
   * <p>Subclasses may override this method to perform the appropriate optimization for this result.
   *
   * @param filter Identifies features to remove
   * @throws IOException
   */
  public void removeFeatures(Filter filter) throws IOException {
    String typeName = getSchema().getTypeName();
    FeatureWriter<SimpleFeatureType, SimpleFeature> writer =
        getDataStore().getFeatureWriter(typeName, filter, getTransaction());
    SimpleFeature feature;

    try {

      while (writer.hasNext()) {
        feature = writer.next();
        writer.remove();
      }
    } finally {
      writer.close();
    }
  }
コード例 #8
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  /**
   * Adds a collection of features to the store.
   *
   * <p>This method operates by getting an appending feature writer and writing all the features in
   * <tt>collection</tt> to it. Directly after a feature is written its id is obtained and added to
   * the returned set.
   */
  public List<FeatureId> addFeatures(Collection collection) throws IOException {

    // gather up id's
    List<FeatureId> ids = new LinkedList<FeatureId>();

    FeatureWriter<SimpleFeatureType, SimpleFeature> writer = getWriterAppend();
    try {
      for (Iterator f = collection.iterator(); f.hasNext(); ) {
        FeatureId id = addFeature((SimpleFeature) f.next(), writer);
        ids.add(id);
      }
    } finally {
      writer.close();
    }

    return ids;
  }
コード例 #9
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 public SimpleFeature next() throws IOException {
   try {
     current = delegate.next();
     retyped = RetypingFeatureCollection.retype(current, builder);
     return retyped;
   } catch (IllegalAttributeException e) {
     throw (IOException) new IOException("Error occurred while retyping feature").initCause(e);
   }
 }
コード例 #10
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  /**
   * Adds a collection of features to the store.
   *
   * <p>This method calls through to {@link #addFeatures(Collection)}.
   *
   * @param featureCollection
   */
  public List<FeatureId> addFeatures(
      FeatureCollection<SimpleFeatureType, SimpleFeature> featureCollection) throws IOException {
    // gather up id's
    List<FeatureId> ids = new LinkedList<FeatureId>();

    FeatureWriter<SimpleFeatureType, SimpleFeature> writer = getWriterAppend();
    FeatureIterator<SimpleFeature> f = featureCollection.features();
    try {
      while (f.hasNext()) {
        SimpleFeature feature = (SimpleFeature) f.next();
        FeatureId id = addFeature(feature, writer);
        ids.add(id);
      }
    } finally {
      writer.close();
      f.close();
    }
    return ids;
  }
コード例 #11
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  /**
   * Removes the features from the store which match the specified filter.
   *
   * <p>This method operates by obtaining an updating feature writer based on the specified
   * <tt>filter</tt> and removing every feature from it.
   *
   * <p>The <tt>filter</tt> must not be <code>null</code>, in this case this method will throw an
   * {@link IllegalArgumentException}.
   */
  public void removeFeatures(Filter filter) throws IOException {
    if (filter == null) {
      String msg = "Must specify a filter, must not be null.";
      throw new IllegalArgumentException(msg);
    }
    filter = resolvePropertyNames(filter);

    // grab a feature writer
    FeatureWriter<SimpleFeatureType, SimpleFeature> writer = getWriter(filter, WRITER_UPDATE);
    try {
      // remove everything
      while (writer.hasNext()) {
        writer.next();
        writer.remove();
      }

    } finally {
      writer.close();
    }
  }
コード例 #12
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 public void write() throws IOException {
   try {
     SimpleFeatureType target = getFeatureType();
     for (int i = 0; i < target.getAttributeCount(); i++) {
       AttributeDescriptor at = target.getDescriptor(i);
       Object value = retyped.getAttribute(i);
       current.setAttribute(at.getLocalName(), value);
     }
     delegate.write();
   } catch (IllegalAttributeException e) {
     throw (IOException) new IOException("Error occurred while retyping feature").initCause(e);
   }
 }
コード例 #13
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  private DataStore createLatLonDataStore() throws Exception {
    SimpleFeatureTypeBuilder tb = new SimpleFeatureTypeBuilder();
    tb.setName("latlon");
    tb.add("the_geom", LineString.class, CRS.decode("EPSG:4326", true));
    tb.add("level", Integer.class);

    SimpleFeatureType type = tb.buildFeatureType();
    MemoryDataStore ds = new MemoryDataStore();

    ds.createSchema(type);

    FeatureWriter<SimpleFeatureType, SimpleFeature> writer;
    writer = ds.getFeatureWriterAppend("latlon", Transaction.AUTO_COMMIT);

    for (int lon = -180; lon < 180; lon += 5) {
      for (int lat = -90; lat < 90; lat += 5) {
        LineString geom;
        int level;

        geom =
            gf.createLineString(
                new Coordinate[] {new Coordinate(lon, lat), new Coordinate(lon, lat + 5)});

        level = 1;
        if (lon % 10 == 0) {
          level = 10;
        }
        if (lon % 30 == 0) {
          level = 30;
        }

        SimpleFeature f;
        f = writer.next();
        f.setAttribute(0, geom);
        f.setAttribute(1, Integer.valueOf(level));
        writer.write();

        geom =
            gf.createLineString(
                new Coordinate[] {new Coordinate(lon, lat), new Coordinate(lon + 5, lat)});

        level = 1;
        if (lat % 10 == 0) {
          level = 10;
        }
        if (lat % 30 == 0) {
          level = 30;
        }
        f = writer.next();
        f.setAttribute(0, geom);
        f.setAttribute(1, Integer.valueOf(level));
        writer.write();
      }
    }
    writer.close();

    return ds;
  }
コード例 #14
0
  @Override
  protected FeatureWriter<SimpleFeatureType, SimpleFeature> getWriterInternal(
      Query query, int flags) throws IOException {
    if (flags == 0) {
      throw new IllegalArgumentException("no write flags set");
    }

    ShapefileFeatureReader reader = (ShapefileFeatureReader) delegate.getReaderInternal(Query.ALL);
    FeatureWriter<SimpleFeatureType, SimpleFeature> writer;
    ShapefileDataStore ds = getDataStore();
    if (ds.indexManager.hasFidIndex(false)
        || ds.isFidIndexed() && ds.indexManager.hasFidIndex(true)) {
      writer =
          new IndexedShapefileFeatureWriter(
              ds.indexManager, reader, ds.getCharset(), ds.getTimeZone());
    } else {
      writer =
          new ShapefileFeatureWriter(delegate.shpFiles, reader, ds.getCharset(), ds.getTimeZone());
    }

    // if we only have to add move to the end.
    // TODO: just make the code transfer the bytes in bulk instead and start actual writing at
    // the end
    if ((flags | WRITER_ADD) == WRITER_ADD) {
      while (writer.hasNext()) {
        writer.next();
      }
    }

    // if we are filtering wrap the writer so that it returns only the selected features
    // but writes down the mall
    Filter filter = query.getFilter();
    if (filter != null && !Filter.INCLUDE.equals(filter)) {
      writer = new FilteringFeatureWriter(writer, filter);
    }

    return writer;
  }
コード例 #15
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  /**
   * Add Features from reader to this FeatureStore.
   *
   * <p>Equivelent to:
   *
   * <pre><code>
   * Set set = new HashSet();
   * FeatureWriter<SimpleFeatureType, SimpleFeature> writer = dataStore.getFeatureWriter( typeName, true, transaction );
   * Featrue feature, newFeature;
   * while( reader.hasNext() ){
   *    feature = reader.next();
   *    newFeature = writer.next();
   *    newFeature.setAttributes( feature.getAttribtues( null ) );
   *    writer.write();
   *    set.add( newfeature.getID() );
   * }
   * reader.close();
   * writer.close();
   *
   * return set;
   * </code>
   * </pre>
   *
   * <p>(If you don't have a FeatureReader<SimpleFeatureType, SimpleFeature> handy
   * DataUtilities.reader() may be able to help out)
   *
   * <p>Subclasses may override this method to perform the appropriate optimization for this result.
   *
   * @param reader
   * @return The Set of FeatureIDs added
   * @throws IOException
   * @see org.geotools.data.FeatureStore#addFeatures(org.geotools.data.FeatureReader)
   */
  public Set addFeatures(FeatureReader<SimpleFeatureType, SimpleFeature> reader)
      throws IOException {
    Set addedFids = new HashSet();
    String typeName = getSchema().getTypeName();
    SimpleFeature feature = null;
    SimpleFeature newFeature;
    FeatureWriter<SimpleFeatureType, SimpleFeature> writer =
        getDataStore().getFeatureWriterAppend(typeName, getTransaction());

    try {
      while (reader.hasNext()) {
        try {
          feature = reader.next();
        } catch (Exception e) {
          throw new DataSourceException("Could not add Features, problem with provided reader", e);
        }

        newFeature = (SimpleFeature) writer.next();

        try {
          newFeature.setAttributes(feature.getAttributes());
        } catch (IllegalAttributeException writeProblem) {
          throw new DataSourceException(
              "Could not create " + typeName + " out of provided feature: " + feature.getID(),
              writeProblem);
        }

        writer.write();
        addedFids.add(newFeature.getID());
      }
    } finally {
      reader.close();
      writer.close();
    }
    return addedFids;
  }
コード例 #16
0
  /**
   * Modifies/updates the features of the store which match the specified filter.
   *
   * <p>This method operates by obtaining an updating feature writer based on the specified
   * <tt>filter</tt> and writing the updated values to it.
   *
   * <p>The <tt>filter</tt> must not be <code>null</code>, in this case this method will throw an
   * {@link IllegalArgumentException}.
   */
  public void modifyFeatures(Name[] type, Object[] value, Filter filter) throws IOException {
    if (filter == null) {
      String msg = "Must specify a filter, must not be null.";
      throw new IllegalArgumentException(msg);
    }
    filter = resolvePropertyNames(filter);

    // grab a feature writer
    FeatureWriter<SimpleFeatureType, SimpleFeature> writer = getWriter(filter, WRITER_UPDATE);
    try {
      while (writer.hasNext()) {
        SimpleFeature toWrite = writer.next();

        for (int i = 0; i < type.length; i++) {
          toWrite.setAttribute(type[i], value[i]);
        }

        writer.write();
      }

    } finally {
      writer.close();
    }
  }
コード例 #17
0
  /**
   * Replace with contents of reader.
   *
   * <p>Equivelent to:
   *
   * <pre><code>
   * FeatureWriter<SimpleFeatureType, SimpleFeature> writer = dataStore.getFeatureWriter( typeName, false, transaction );
   * Feature feature, newFeature;
   * while( writer.hasNext() ){
   *    feature = writer.next();
   *    writer.remove();
   * }
   * while( reader.hasNext() ){
   *    newFeature = reader.next();
   *    feature = writer.next();
   *    newFeature.setAttributes( feature.getAttributes( null ) );
   *    writer.write();
   * }
   * reader.close();
   * writer.close();
   * </code>
   * </pre>
   *
   * <p>Subclasses may override this method to perform the appropriate optimization for this result.
   *
   * @param reader Contents to replace with
   * @throws IOException
   */
  public void setFeatures(FeatureReader<SimpleFeatureType, SimpleFeature> reader)
      throws IOException {
    String typeName = getSchema().getTypeName();
    FeatureWriter<SimpleFeatureType, SimpleFeature> writer =
        getDataStore().getFeatureWriter(typeName, getTransaction());
    SimpleFeature feature;
    SimpleFeature newFeature;

    try {
      while (writer.hasNext()) {
        feature = writer.next();
        LOGGER.finer("removing feature " + feature);
        writer.remove();
      }

      while (reader.hasNext()) {
        try {
          feature = reader.next();
        } catch (Exception readProblem) {
          throw new DataSourceException(
              "Could not add Features, problem with provided reader", readProblem);
        }

        newFeature = (SimpleFeature) writer.next();

        try {
          newFeature.setAttributes(feature.getAttributes());
        } catch (IllegalAttributeException writeProblem) {
          throw new DataSourceException(
              "Could not create " + typeName + " out of provided feature: " + feature.getID(),
              writeProblem);
        }
        LOGGER.finer("writing feature " + newFeature);
        writer.write();
      }
    } finally {
      reader.close();
      writer.close();
    }
  }
コード例 #18
0
 public void remove() throws IOException {
   delegate.write();
 }
コード例 #19
0
 public void close() throws IOException {
   delegate.close();
   delegate = null;
   builder = null;
 }
コード例 #20
0
 public boolean hasNext() throws IOException {
   return delegate.hasNext();
 }
コード例 #21
0
  public void rollback(String toVersion, Filter filter, String[] userIds) throws IOException {
    // TODO: build an optimized version of this that can do the same work with a couple
    // of queries assuming the filter is fully encodable

    Transaction t = getTransaction();
    boolean autoCommit = false;
    if (Transaction.AUTO_COMMIT.equals(t)) {
      t = new DefaultTransaction();
      autoCommit = true;
    }

    // Gather feature modified after toVersion
    ModifiedFeatureIds mfids =
        store.getModifiedFeatureFIDs(schema.getTypeName(), toVersion, null, filter, userIds, t);
    FilterFactory ff = CommonFactoryFinder.getFilterFactory(null);

    // grab the state, we need to mark as dirty all the features we are going to modify/re-insert
    VersionedJdbcTransactionState state = store.wrapped.getVersionedJdbcTransactionState(t);

    // remove all features that have been created and not deleted
    Set fidsToRemove = new HashSet(mfids.getCreated());
    fidsToRemove.removeAll(mfids.getDeleted());
    if (!fidsToRemove.isEmpty()) {
      removeFeatures(store.buildFidFilter(fidsToRemove));
      state.setTypeNameDirty(getSchema().getTypeName());
    }

    // reinstate all features that were there before toVersion and that
    // have been deleted after it. Notice this is an insertion, so to preserve
    // the fids I have to use low level writers where I can set all attributes manually
    // (we work on the assumption the wrapped data store maps all attributes of the primary
    // key in the feature itself)
    Set fidsToRecreate = new HashSet(mfids.getDeleted());
    fidsToRecreate.removeAll(mfids.getCreated());
    if (!fidsToRecreate.isEmpty()) {
      state.setTypeNameDirty(getSchema().getTypeName());
      state.setFidsDirty(getSchema().getTypeName(), fidsToRecreate);

      long revision = store.wrapped.getVersionedJdbcTransactionState(t).getRevision();
      Filter recreateFilter =
          store.buildVersionedFilter(
              schema.getTypeName(), store.buildFidFilter(fidsToRecreate), mfids.fromRevision);
      FeatureReader<SimpleFeatureType, SimpleFeature> fr = null;
      FeatureWriter<SimpleFeatureType, SimpleFeature> fw = null;
      try {
        DefaultQuery q = new DefaultQuery(schema.getTypeName(), recreateFilter);
        fr = store.wrapped.getFeatureReader(q, t);
        fw = store.wrapped.getFeatureWriterAppend(schema.getTypeName(), t);
        while (fr.hasNext()) {
          SimpleFeature original = fr.next();
          SimpleFeature restored = fw.next();
          for (int i = 0; i < original.getFeatureType().getAttributeCount(); i++) {
            restored.setAttribute(i, original.getAttribute(i));
          }
          restored.setAttribute("revision", new Long(revision));
          restored.setAttribute("expired", new Long(Long.MAX_VALUE));
          fw.write();
        }
      } catch (IllegalAttributeException iae) {
        throw new DataSourceException(
            "Unexpected error occurred while " + "restoring deleted featues", iae);
      } finally {
        if (fr != null) fr.close();
        if (fw != null) fw.close();
      }
    }

    // Now onto the modified features, that were there, and still are there.
    // Since we cannot get a sorted writer we have to do a kind of inner loop scan
    // (note, a parellel scan of similarly sorted reader and writer would be more
    // efficient, but writer sorting is not there...)
    // Here it's possible to work against the external API, thought it would be more
    // efficient (but more complex) to work against the wrapped one.
    if (!mfids.getModified().isEmpty()) {
      state.setTypeNameDirty(getSchema().getTypeName());
      state.setFidsDirty(getSchema().getTypeName(), mfids.getModified());

      Filter modifiedIdFilter = store.buildFidFilter(mfids.getModified());
      Filter mifCurrent =
          store.buildVersionedFilter(schema.getTypeName(), modifiedIdFilter, new RevisionInfo());
      FeatureReader<SimpleFeatureType, SimpleFeature> fr = null;
      FeatureWriter<SimpleFeatureType, SimpleFeature> fw = null;
      try {
        fw = store.getFeatureWriter(schema.getTypeName(), mifCurrent, t);
        while (fw.hasNext()) {
          SimpleFeature current = fw.next();
          Filter currIdFilter = ff.id(Collections.singleton(ff.featureId(current.getID())));
          Filter cidToVersion =
              store.buildVersionedFilter(schema.getTypeName(), currIdFilter, mfids.fromRevision);
          DefaultQuery q = new DefaultQuery(schema.getTypeName(), cidToVersion);
          q.setVersion(mfids.fromRevision.toString());
          fr = store.getFeatureReader(q, t);
          SimpleFeature original = fr.next();
          for (int i = 0; i < original.getFeatureType().getAttributeCount(); i++) {
            current.setAttribute(i, original.getAttribute(i));
          }
          fr.close();
          fw.write();
        }
      } catch (IllegalAttributeException iae) {
        throw new DataSourceException(
            "Unexpected error occurred while " + "restoring deleted featues", iae);
      } finally {
        if (fr != null) fr.close();
        if (fw != null) fw.close();
      }
    }

    // if it's auto commit, don't forget to actually commit
    if (autoCommit) {
      t.commit();
      t.close();
    }
  }