Package org.opengis.parameter

Examples of org.opengis.parameter.ParameterValue

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                         * request, and by the way in the reading parameters. If
                         * it is the case, one can adds it to the request. If an
                         * exception is thrown, we have nothing to do.
                         */
                        try {
                            ParameterValue time = reader.getFormat().getReadParameters().parameter(
                                    "TIME");
                            if (time != null && request.getTime() != null) {
                                time.setValue(request.getTime());
                            }
                        } catch (ParameterNotFoundException p) {
                        }

                        // uncomment when the DIM_RANGE vendor parameter will be
                        // enabled
                        // try {
                        // ParameterValue dimRange =
                        // reader.getFormat().getReadParameters()
                        // .parameter("DIM_RANGE");
                        // if (dimRange != null && request.getDimRange() !=
                        // null) {
                        // dimRange.setValue(request.getDimRange());
                        // }
                        // } catch (ParameterNotFoundException p) {
                        // }

                        try {
                            ParameterValue elevation = reader.getFormat().getReadParameters()
                                    .parameter("ELEVATION");
                            if (elevation != null && request.getElevation() != null) {
                                elevation.setValue(request.getElevation().intValue());
                            }
                        } catch (ParameterNotFoundException p) {
                            //ignore?
                        }

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        if ((params != null) && (params.values().size() > 0)) {
            List list = params.values();
            final Iterator it = list.iterator();
            while (it.hasNext()) {
                final ParameterValue val = (ParameterValue) it.next();

                if (val != null) {
                    final ParameterDescriptor descr = (ParameterDescriptor) val.getDescriptor();
                    final String _key = descr.getName().toString();

                    if ("namespace".equals(_key)) {
                        // skip namespace as it is *magic* and
                        // appears to be an entry used in all dataformats?
                        //
                        continue;
                    }

                    // /////////////////////////////////////////////////////////
                    //
                    // request param for better management of coverage
                    //
                    // /////////////////////////////////////////////////////////
                    if (_key.equalsIgnoreCase(readGeometryKey)) {
                        // IGNORING READ_GRIDGEOMETRY2D param
                        continue;
                    }
                    final Object value = val.getValue();

                    parameters.add(new DefaultParameterDescriptor(_key, value.getClass(), null,
                            value).createValue());
                }
            }
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        if ((params != null) && (params.values().size() > 0)) {
            final List list = params.values();
            final Iterator it = list.iterator();
            while (it.hasNext()) {
                final ParameterValue val = (ParameterValue) it.next();

                if (val != null) {
                    final ParameterDescriptor descr = (ParameterDescriptor) val.getDescriptor();

                    final String _key = descr.getName().toString();

                    if ("namespace".equals(_key)) {
                        // skip namespace as it is *magic* and
                        // appears to be an entry used in all dataformats?
                        //
                        continue;
                    }

                    // /////////////////////////////////////////////////////////
                    //
                    // request param for better management of coverage
                    //
                    // /////////////////////////////////////////////////////////
                    if (_key.equalsIgnoreCase(readGeometryKey)) {
                        // IGNORING READ_GRIDGEOMETRY2D param
                        continue;
                    }

                    Object value = val.getValue();
                    String text = "";

                    if (value == null) {
                        text = null;
                    } else if (value instanceof String) {
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     */
    public static ParameterValue find(ParameterValueGroup params, String key) {
        List list = params.values();
        Iterator it = list.iterator();
        ParameterDescriptor descr;
        ParameterValue val;

        while (it.hasNext()) {
            val = (ParameterValue) it.next();
            descr = (ParameterDescriptor) val.getDescriptor();

            if (key.equalsIgnoreCase(descr.getName().toString())) {
                return val;
            }
        }
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        if (params != null) {
            List list = params.values();
            Iterator it = list.iterator();
            ParameterDescriptor descr = null;
            ParameterValue val = null;
            String key;
            Object value;

            while (it.hasNext()) {
                val = (ParameterValue) it.next();
                descr = (ParameterDescriptor) val.getDescriptor();

                key = descr.getName().toString();
                value = null;

                if (val.getValue() != null) {
                    // Required params may have nice sample values
                    //
                    if ("values_palette".equalsIgnoreCase(key)) {
                        value = val.getValue();
                    } else {
                        value = val.getValue().toString();
                    }
                }

                if (value == null) {
                    // or not
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        final GridCoverageWriter writer = new WorldImageWriter(output);

        // writing parameters for Image
        final Format writerParams = writer.getFormat();
        final ParameterValueGroup writeParameters = writerParams.getWriteParameters();
        final ParameterValue format = writeParameters.parameter("Format");
        format.setValue(this.outputFormat.toLowerCase());

        // writing
        writer.write(sourceCoverage, new GeneralParameterValue[] {format});

        // freeing everything
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      // Checking params
      //
      // /////////////////////////////////////////////////////////////////////
      if (params != null) {
        for (int i = 0; i < params.length; i++) {
          final ParameterValue param = (ParameterValue) params[i];
          final String name = param.getDescriptor().getName().getCode();
          if (name.equals(
              AbstractGridFormat.READ_GRIDGEOMETRY2D.getName()
                  .toString())) {
            final GridGeometry2D gg = (GridGeometry2D) param
                .getValue();
            requestedEnvelope = new GeneralEnvelope((Envelope) gg
                .getEnvelope2D());
            dim = gg.getGridRange2D().getBounds();
            continue;
          }
          if (name.equals(AbstractGridFormat.OVERVIEW_POLICY
              .getName().toString())) {
            overviewPolicy=(OverviewPolicy) param.getValue();
            continue;
          }         
        }
      }
    }
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      // Checking params
      //
      // /////////////////////////////////////////////////////////////////////
      if (params != null) {
        for (int i = 0; i < params.length; i++) {
          @SuppressWarnings("rawtypes")
                    final ParameterValue param = (ParameterValue) params[i];
          if (param == null){
            continue;
          }
          final String name = param.getDescriptor().getName().getCode();
          if (name.equals(AbstractGridFormat.READ_GRIDGEOMETRY2D.getName().toString())) {
            final GridGeometry2D gg = (GridGeometry2D) param.getValue();
            requestedEnvelope = new GeneralEnvelope((Envelope)gg.getEnvelope2D());
            dim = gg.getGridRange2D().getBounds();
            continue;
          }
          if (name.equals(AbstractGridFormat.OVERVIEW_POLICY.getName().toString())) {
            overviewPolicy = (OverviewPolicy) param.getValue();
            continue;
          }
        }
      }
    }
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    Rectangle requestedDim = null;
    OverviewPolicy overviewPolicy=null;
    if (params != null) {
      final int length = params.length;
      for (int i = 0; i < length; i++) {
        final ParameterValue param = (ParameterValue) params[i];
        final String name = param.getDescriptor().getName().getCode();
        if (name.equals(AbstractGridFormat.READ_GRIDGEOMETRY2D.getName().toString())) {
          final GridGeometry2D gg = (GridGeometry2D) param.getValue();
          readEnvelope = new GeneralEnvelope((Envelope) gg.getEnvelope2D());
          requestedDim = gg.getGridRange2D().getBounds();
          continue;
        }
        if (name.equals(AbstractGridFormat.OVERVIEW_POLICY.getName().toString())) {
          overviewPolicy=(OverviewPolicy) param.getValue();
        }
      }
    }
    return createCoverage(readEnvelope, requestedDim, overviewPolicy);
  }
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                    oldEnvelope.getUpperCorner().getOrdinate(0),
                    oldEnvelope.getUpperCorner().getOrdinate(1)
                });
        cropEnvelope.setCoordinateReferenceSystem(reader.getCrs());

        final ParameterValue gg = (ParameterValue) ((AbstractGridFormat) reader.getFormat()).READ_GRIDGEOMETRY2D
            .createValue();
        gg.setValue(new GridGeometry2D(
                new GridEnvelope2D(
                    new Rectangle(0, 0, (int) (range.width / 2.0 / cropFactor),
                        (int) (range.height / 2.0 / cropFactor))), cropEnvelope));
        gc = (GridCoverage2D) reader.read(new GeneralParameterValue[] { gg });
        forceDataLoading(gc);
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