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com.github.davidmoten.grumpy.wms.WmsRequest Maven / Gradle / Ivy
package com.github.davidmoten.grumpy.wms;
import static com.github.davidmoten.util.servlet.RequestUtil.getList;
import static com.github.davidmoten.util.servlet.RequestUtil.getParameter;
import java.awt.Color;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Date;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import javax.servlet.http.HttpServletRequest;
import org.apache.commons.lang3.ObjectUtils;
import com.github.davidmoten.grumpy.projection.FeatureUtil;
import com.github.davidmoten.grumpy.projection.ProjectorBounds;
import com.github.davidmoten.util.servlet.RequestUtil;
public class WmsRequest {
private static final String DATETIME_FORMAT_ISO_8601 = "yyyy-MM-dd'T'HH:mm:ss";
private List layers = new ArrayList();
private List queryLayers = new ArrayList();
private List styles = new ArrayList();
private final ProjectorBounds bounds;
private final String format;
private final int width;
private final int height;
private final boolean transparent;
private final Color backgroundColor;
private final String version;
private final String infoFormat;
private final Map parameters;
private final Date time;
public WmsRequest(List layers, List queryLayers, List styles,
ProjectorBounds bounds, String format, int width, int height, boolean transparent,
Color backgroundColor, String version, String infoFormat,
Map parameters, Date time) {
this.layers = layers;
this.queryLayers = queryLayers;
this.styles = styles;
this.bounds = bounds;
this.format = format;
this.width = width;
this.height = height;
this.transparent = transparent;
this.backgroundColor = backgroundColor;
this.version = version;
this.infoFormat = infoFormat;
this.parameters = parameters;
this.time = time;
}
public WmsRequest(HttpServletRequest request) throws MissingMandatoryParameterException {
this(getList(request, "LAYERS", true), getList(request, "QUERY_LAYERS", false),
getList(request, "STYLES", true),
getBounds(getEffectiveCrs(request), getParameter(request, "BBOX", true),
getVersion(request)),
getParameter(request, "FORMAT", true),
Integer.parseInt(getParameter(request, "WIDTH", true)),
Integer.parseInt(getParameter(request, "HEIGHT", true)), isTransparent(request),
getBackgroundColor(request), getVersion(request),
getParameter(request, "INFO_FORMAT", false), getParameters(request),
getTime(request));
}
public WmsRequest(String layers, String queryLayers, String styles, String crs, String srs,
String bbox, String format, String width, String height, String transparent,
String bgColor, String version, String infoFormat, Map parameters,
String time) {
this(list(checkNotBlank(layers, "LAYERS")), //
list(queryLayers), //
list(styles), // spec says non-empty but uDig doesn't honour so not enforcing it
getBounds(getEffectiveCrs(srs, crs), //
checkNotBlank(bbox, "BBOX"), //
version), //
checkNotBlank(format, "FORMAT"), //
parseInt(width, "WIDTH"), //
parseInt(height, "HEIGHT"), //
"true".equalsIgnoreCase(transparent), //
getColor(bgColor, "BGCOLOR"), //
checkNotBlank(version, "VERSION"), //
infoFormat, //
parameters, //
getTime(time));
}
private static int parseInt(String s, String name) {
try {
return Integer.parseInt(checkNotBlank(s, name));
} catch (NumberFormatException e) {
throw new IllegalArgumentException(name + " is not a valid integer: " + s);
}
}
private static String checkNotBlank(String s, String name) {
if (s == null || s.trim().isEmpty()) {
throw new IllegalArgumentException(name + " parameter must be present");
}
return s;
}
private static List list(String value) {
if (value == null) {
return Collections.emptyList();
} else {
return Arrays.asList(value.split(","));
}
}
private static Date getTime(HttpServletRequest request)
throws MissingMandatoryParameterException {
String s = getParameter(request, "TIME", false);
return getTime(s);
}
private static Date getTime(String s) {
if (s != null) {
SimpleDateFormat sdf = new SimpleDateFormat(DATETIME_FORMAT_ISO_8601);
try {
return sdf.parse(s);
} catch (ParseException e) {
throw new IllegalArgumentException("TIME invalid format: " + e.getMessage());
}
} else
return null;
}
private static Map getParameters(HttpServletRequest request) {
Map map = new HashMap();
@SuppressWarnings("unchecked")
Enumeration en = request.getParameterNames();
while (en.hasMoreElements()) {
String name = en.nextElement();
map.put(name, request.getParameter(name));
}
return map;
}
public WmsRequest modifySize(int w, int h) {
return new WmsRequest(layers, queryLayers, styles, bounds, format, w, h, transparent,
backgroundColor, version, infoFormat, parameters, time);
}
public String getVersion() {
return version;
}
public WmsRequest modifyStyles(List newStyles) {
return new WmsRequest(layers, queryLayers, newStyles, bounds, format, width, height,
transparent, backgroundColor, version, infoFormat, parameters, time);
}
public WmsRequest modifyBounds(ProjectorBounds newBounds) {
return new WmsRequest(layers, queryLayers, styles, newBounds, format, width, height,
transparent, backgroundColor, version, infoFormat, parameters, time);
}
public List getQueryLayers() {
if (queryLayers.size() == 0)
return layers;
else
return queryLayers;
}
public String getParam(String name) {
return parameters.get(name);
}
public Set getParameterNames() {
return parameters.keySet();
}
private static boolean isTransparent(HttpServletRequest request)
throws MissingMandatoryParameterException {
return "true".equalsIgnoreCase(getParameter(request, "TRANSPARENT", false));
}
private static String getVersion(HttpServletRequest request)
throws MissingMandatoryParameterException {
return getParameter(request, "VERSION", false);
}
private static Color getBackgroundColor(HttpServletRequest request)
throws MissingMandatoryParameterException {
String s = getParameter(request, "BGCOLOR", false);
return getColor(s, "BGCOLOR");
}
private static Color getColor(String s, String name) {
try {
if (s != null)
return new Color(Integer.valueOf(s.substring(2), 16));
else
return Color.white;
} catch (Throwable e) {
throw new IllegalArgumentException("Invalid color format for " + name);
}
}
private static String getEffectiveCrs(HttpServletRequest request)
throws MissingMandatoryParameterException {
String srs = request.getParameter("SRS");
String crs = RequestUtil.getParameter(request, "CRS", false);
return getEffectiveCrs(srs, crs);
}
private static String getEffectiveCrs(String srs, String crs) {
return ObjectUtils.firstNonNull(crs, srs, FeatureUtil.EPSG_4326);
}
@Override
public String toString() {
return "WmsRequest [layers=" + layers + ", queryLayers=" + queryLayers + ", styles="
+ styles + ", bounds=" + bounds + ", format=" + format + ", width=" + width
+ ", height=" + height + ", transparent=" + transparent + ", backgroundColor="
+ backgroundColor + ", version=" + version + ", infoFormat=" + infoFormat
+ ", parameters=" + parameters + "]";
}
/**
* Expected to be in lat long (EPSG:4326).
*
* @param s
* @param version
* @param srs
* @return
*/
private static ProjectorBounds getBounds(String crs, String s, String version) {
if (s == null)
return null;
String[] items = s.split(",");
double minLong;
double minLat;
double maxLong;
double maxLat;
/**
* there is some confusion about order of bbox parameters. The OpenGIS WMS 1.3.0
* spec says: http://portal.opengeospatial.org/files/?artifact_id=14416,
* 7.3.3.6: The value of the BBOX parameter in a GetMap request is a list of
* comma-separated real numbers (see 6.5) in the form "minx,miny,maxx,maxy".
* These values specify the minimum X, minimum Y, maximum X, and maximum Y
* values of a region in the Layer CRS of the request.
*
* Yet, the GeoServer doco says:
*
* http://docs.geoserver.org/stable/en/user/services/wms/basics.html
*
* Apparently the bbox parameter order is now that determined by the CRS
* definition. EPSG:3857 for instance has this in its WKT: AXIS [X, "EAST"]
* AXIS[Y,"NORTH"]. Still can't suss it but getting closer!
*
**/
//TODO use axis definitions for the EPSG to determine coordinate ordering
try {
if (("1.1.1".equals(version) || ("1.1.0".equals(version)) || !"CRS:84".equals(crs) && !"EPSG:4326".equals(crs))) {
minLong = Double.parseDouble(items[0]);
minLat = Double.parseDouble(items[1]);
maxLong = Double.parseDouble(items[2]);
maxLat = Double.parseDouble(items[3]);
} else {
// this is the order for CRS:84 but EPSG:4326 apparently not
minLat = Double.parseDouble(items[0]);
minLong = Double.parseDouble(items[1]);
maxLat = Double.parseDouble(items[2]);
maxLong = Double.parseDouble(items[3]);
}
} catch (NumberFormatException | ArrayIndexOutOfBoundsException e) {
throw new IllegalArgumentException(
"BBOX invalid, should be decimal,decimal,decimal,decimal");
}
return new ProjectorBounds(crs, minLong, minLat, maxLong, maxLat);
}
public List getLayers() {
return layers;
}
public List getStyles() {
return styles;
}
public String getCrs() {
return bounds.getSrs();
}
public String getFormat() {
return format;
}
public int getWidth() {
return width;
}
public int getHeight() {
return height;
}
public boolean isTransparent() {
return transparent;
}
public Color getBackgroundColor() {
return backgroundColor;
}
public ProjectorBounds getBounds() {
return bounds;
}
public String getInfoFormat() {
return infoFormat;
}
public Date getTime() {
return time;
}
}
