coverageutils.java

电子地图服务器,搭建自己的地图服务

/* Copyright (c) 2001 - 2007 TOPP - www.openplans.org.  All rights reserved.
 * This code is licensed under the GPL 2.0 license, availible at the root
 * application directory.
 */
package org.vfny.geoserver.util;

import org.geotools.coverage.grid.GeneralGridGeometry;
import org.geotools.coverage.grid.io.AbstractGridFormat;
import org.geotools.factory.Hints;
import org.geotools.geometry.GeneralEnvelope;
import org.geotools.parameter.DefaultParameterDescriptor;
import org.geotools.referencing.CRS;
import org.geotools.referencing.operation.BufferedCoordinateOperationFactory;
import org.opengis.parameter.GeneralParameterValue;
import org.opengis.parameter.ParameterDescriptor;
import org.opengis.parameter.ParameterValue;
import org.opengis.parameter.ParameterValueGroup;
import org.opengis.referencing.FactoryException;
import org.opengis.referencing.crs.CoordinateReferenceSystem;
import org.opengis.referencing.operation.CoordinateOperation;
import org.opengis.referencing.operation.MathTransform;
import org.opengis.referencing.operation.OperationNotFoundException;
import java.awt.Color;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Vector;
import java.util.logging.Level;
import java.util.logging.Logger;


/**
 * DOCUMENT ME!
 *
 * @author $Author: Alessio Fabiani ([e-mail]) $ (last
 *         modification)
 * @author $Author: Simone Giannecchini ([e-mail]) $ (last
 *         modification)
 */
public class CoverageUtils {
    private final static BufferedCoordinateOperationFactory operationFactory = new BufferedCoordinateOperationFactory(new Hints(
                Hints.LENIENT_DATUM_SHIFT, Boolean.TRUE));
    private final static Logger LOGGER = org.geotools.util.logging.Logging.getLogger(CoverageUtils.class.toString());
    public static final int TRANSPARENT = 0;
    public static final int OPAQUE = 1;

    public static GeneralParameterValue[] getParameters(ParameterValueGroup params) {
        final List parameters = new ArrayList();
        final String readGeometryKey = AbstractGridFormat.READ_GRIDGEOMETRY2D.getName().toString();

        if ((params != null) && (params.values().size() > 0)) {
            List list = params.values();
            Iterator it = list.iterator();
            ParameterDescriptor descr = null;
            ParameterValue val = null;

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

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

                    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();

                    parameters.add(new DefaultParameterDescriptor(_key, value.getClass(), null,
                            value).createValue());
                }
            }

            return (!parameters.isEmpty())
            ? (GeneralParameterValue[]) parameters.toArray(new GeneralParameterValue[parameters.size()])
            : null;
        } else {
            return null;
        }
    }

    public static GeneralParameterValue[] getParameters(ParameterValueGroup params, Map values) {
        return getParameters(params, values, false);
    }

    public static GeneralParameterValue[] getParameters(ParameterValueGroup params, Map values,
        boolean readGeom) {
        final List parameters = new ArrayList();
        final String readGeometryKey = AbstractGridFormat.READ_GRIDGEOMETRY2D.getName().toString();

        if ((params != null) && (params.values().size() > 0)) {
            List list = params.values();
            Iterator it = list.iterator();
            ParameterDescriptor descr = null;
            ParameterValue val = null;

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

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

                    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) && !readGeom) {
                        // IGNORING READ_GRIDGEOMETRY2D param
                        continue;
                    }

                    // /////////////////////////////////////////////////////////
                    //
                    // format specific params
                    //
                    // /////////////////////////////////////////////////////////
                    Object value = CoverageUtils.getCvParamValue(_key, val, values);

                    if ((value == null)
                            && (_key.equalsIgnoreCase("InputTransparentColor")
                            || _key.equalsIgnoreCase("OutputTransparentColor"))) {
                        parameters.add(new DefaultParameterDescriptor(_key, Color.class, null, value)
                            .createValue());
                    } else {
                        parameters.add(new DefaultParameterDescriptor(_key, value.getClass(), null,
                                value).createValue());
                    }
                }
            }

            return (!parameters.isEmpty())
            ? (GeneralParameterValue[]) parameters.toArray(new GeneralParameterValue[parameters.size()])
            : null;
        } else {
            return null;
        }
    }

    public static Map getParametersKVP(ParameterValueGroup params) {
        final Map parameters = new HashMap();
        final String readGeometryKey = AbstractGridFormat.READ_GRIDGEOMETRY2D.getName().toString();

        if ((params != null) && (params.values().size() > 0)) {
            List list = params.values();
            Iterator it = list.iterator();
            ParameterDescriptor descr = null;
            ParameterValue val = null;

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

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

                    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;