/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2007-2008, Open Source Geospatial Foundation (OSGeo)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*/
package org.geotools.referencing.factory;
import org.opengis.metadata.citation.Citation;
import org.opengis.referencing.FactoryException;
import org.opengis.referencing.NoSuchAuthorityCodeException;
import org.opengis.referencing.crs.CRSAuthorityFactory;
import org.opengis.referencing.cs.CSAuthorityFactory;
import org.opengis.referencing.datum.DatumAuthorityFactory;
import org.opengis.referencing.operation.CoordinateOperationAuthorityFactory;
import org.geotools.factory.Hints;
import org.geotools.util.GenericName;
import org.geotools.metadata.iso.citation.Citations;
import org.geotools.resources.i18n.ErrorKeys;
import org.geotools.resources.i18n.Errors;
/**
* Wraps {@linkplain AllAuthoritiesFactory all factories} in a {@code "http://www.opengis.net/"}
* name space. An exemple of complete URL is {@code "http://www.opengis.net/gml/srs/epsg.xml#4326"}.
* <p>
* Implementation note: this class requires some cooperation from the
* {@link AllAuthoritiesFactory#getSeparator} method, since the separator is not the usual
* {@value org.geotools.util.GenericName#DEFAULT_SEPARATOR} character.
*
* @author Martin Desruisseaux
*
* @source $URL$
*/
public class HTTP_AuthorityFactory extends AuthorityFactoryAdapter implements CRSAuthorityFactory,
CSAuthorityFactory, DatumAuthorityFactory, CoordinateOperationAuthorityFactory
{
/**
* The base URL, which is {@value}.
*/
public static final String BASE_URL = "http://www.opengis.net/gml/srs/";
/**
* Creates a default wrapper.
*/
public HTTP_AuthorityFactory() {
this((Hints) null);
}
/**
* Creates a wrapper using the specified hints. For strict compliance with OGC
* definition of CRS defined by URL, the supplied hints should contains at least the
* {@link Hints#FORCE_LONGITUDE_FIRST_AXIS_ORDER FORCE_LONGITUDE_FIRST_AXIS_ORDER} hint
* with value {@link Boolean#FALSE FALSE}.
*
* @param userHints The hints to be given to backing factories.
*/
public HTTP_AuthorityFactory(final Hints userHints) {
this(getFactory(userHints, "http"));
}
/**
* Creates a wrapper around the specified factory. The supplied factory is given unchanged
* to the {@linkplain AuthorityFactoryAdapter#AuthorityFactoryAdapter(AuthorityFactory)
* super class constructor}.
*/
public HTTP_AuthorityFactory(final AllAuthoritiesFactory factory) {
super(factory);
}
/**
* Returns {@code false} if {@link Hints#FORCE_LONGITUDE_FIRST_AXIS_ORDER} should be set to
* {@link Boolean#FALSE}. This method compares {@link Hints#FORCE_AXIS_ORDER_HONORING} with
* the specified authority.
*
* @param hints The hints to use (may be {@code null}).
* @param authority The authority factory under creation.
*
* @todo Should not looks at system hints; this is {@link ReferencingFactoryFinder}'s job.
*/
static boolean defaultAxisOrderHints(final Hints hints, final String authority) {
Object value = null;
if (hints != null) {
value = hints.get(Hints.FORCE_AXIS_ORDER_HONORING);
}
if (value == null) {
value = Hints.getSystemDefault(Hints.FORCE_AXIS_ORDER_HONORING);
}
if (value instanceof CharSequence) {
final String list = value.toString();
int i = 0;
while ((i = list.indexOf(authority, i)) >= 0) {
if (i==0 || !Character.isJavaIdentifierPart(list.charAt(i - 1))) {
final int j = i + authority.length();
if (j==list.length() || !Character.isJavaIdentifierPart(list.charAt(j))) {
// Found the authority in the list: we need to use the global setting.
return true;
}
}
i++;
}
}
return false;
}
/**
* Returns a factory from the specified hints. Used by {@link URN_AuthorityFactory}
* constructor as well.
*/
static AllAuthoritiesFactory getFactory(Hints hints, final String authority) {
if (!defaultAxisOrderHints(hints, authority)) {
hints = new Hints(hints);
hints.put(Hints.FORCE_LONGITUDE_FIRST_AXIS_ORDER, Boolean.FALSE);
}
return new AllAuthoritiesFactory(hints);
}
/**
* Returns the authority, which contains the {@code "http://www.opengis.net"} identifier.
*/
@Override
public Citation getAuthority() {
return Citations.HTTP_OGC;
}
/**
* Removes the URL base ({@value #BASE_URL}) from the specified code
* before to pass it to the wrapped factories.
*
* @param code The code given to this factory.
* @return The code to give to the underlying factories.
* @throws FactoryException if the code can't be converted.
*/
@Override
protected String toBackingFactoryCode(String code) throws FactoryException {
code = code.trim();
final int length = BASE_URL.length();
if (code.regionMatches(true, 0, BASE_URL, 0, length)) {
code = code.substring(length);
if (code.indexOf('/') < 0) {
final int split = code.indexOf('#');
if (split >= 0 && code.indexOf('#', split+1) < 0) {
String authority = code.substring(0, split).trim();
final int ext = authority.lastIndexOf('.');
if (ext > 0) {
// Removes the extension part (typically ".xml")
authority = authority.substring(0, ext);
}
code = code.substring(split + 1).trim();
code = authority + GenericName.DEFAULT_SEPARATOR + code;
return code;
}
}
}
throw new NoSuchAuthorityCodeException(Errors.format(ErrorKeys.ILLEGAL_ARGUMENT_$2,
"code", code), BASE_URL, code);
}
}