/* (c) 2014 Open Source Geospatial Foundation - all rights reserved
* (c) 2001 - 2013 OpenPlans
* This code is licensed under the GPL 2.0 license, available at the root
* application directory.
*/
package org.geoserver.gwc.layer;
import static org.geoserver.gwc.GWC.tileLayerName;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;
import java.util.TreeSet;
import org.geoserver.catalog.CatalogInfo;
import org.geoserver.catalog.CoverageInfo;
import org.geoserver.catalog.FeatureTypeInfo;
import org.geoserver.catalog.LayerGroupInfo;
import org.geoserver.catalog.LayerInfo;
import org.geoserver.catalog.ResourceInfo;
import org.geoserver.gwc.config.GWCConfig;
import org.geowebcache.config.XMLGridSubset;
import org.geowebcache.filter.parameters.FloatParameterFilter;
import org.geowebcache.filter.parameters.ParameterFilter;
import org.geowebcache.filter.parameters.RegexParameterFilter;
import org.geowebcache.filter.parameters.StringParameterFilter;
/**
* Utility methods for manipulating {@link GeoServerTileLayerInfo}s
*/
public class TileLayerInfoUtil {
/**
* Creates a cached tile layer from the given Layer or Layer Group
* @param info a Layerinfo or LayerGroupInfo
* @param defaults default configuration
* @return
*/
public static GeoServerTileLayerInfo loadOrCreate(final CatalogInfo info,
final GWCConfig defaults) {
if (info instanceof LayerInfo) {
return loadOrCreate((LayerInfo) info, defaults);
}
if (info instanceof LayerGroupInfo) {
return loadOrCreate((LayerGroupInfo) info, defaults);
}
throw new IllegalArgumentException();
}
/**
* Creates a cached tile layer from the given Layer Group
* @param info the layer group to cache
* @param defaults default configuration
* @return
*/
public static GeoServerTileLayerInfoImpl loadOrCreate(final LayerGroupInfo groupInfo,
final GWCConfig defaults) {
GeoServerTileLayerInfoImpl info = LegacyTileLayerInfoLoader.load(groupInfo);
if (info == null) {
info = create(defaults);
checkAutomaticStyles(groupInfo, info);
}
info.setName(tileLayerName(groupInfo));
info.setId(groupInfo.getId());
return info;
}
/**
* Creates a cached tile layer from the given Layer
* @param info the layer to cache
* @param defaults default configuration
* @return
*/
public static GeoServerTileLayerInfoImpl loadOrCreate(final LayerInfo layerInfo,
final GWCConfig defaults) {
GeoServerTileLayerInfoImpl info = LegacyTileLayerInfoLoader.load(layerInfo);
if (info == null) {
info = create(defaults);
final ResourceInfo resource = layerInfo.getResource();
if (resource instanceof FeatureTypeInfo) {
info.getMimeFormats().clear();
info.getMimeFormats().addAll(defaults.getDefaultVectorCacheFormats());
} else if (resource instanceof CoverageInfo) {
info.getMimeFormats().clear();
info.getMimeFormats().addAll(defaults.getDefaultCoverageCacheFormats());
}
checkAutomaticStyles(layerInfo, info);
}
info.setName(tileLayerName(layerInfo));
info.setId(layerInfo.getId());
return info;
}
// FIXME I think this only needs to be package visible for the tests to work.
/**
* Creates a default tile layer info based on the global defaults, public only for unit testing
* purposes.
*/
public static GeoServerTileLayerInfoImpl create(GWCConfig defaults) {
GeoServerTileLayerInfoImpl info = new GeoServerTileLayerInfoImpl();
info.setEnabled(defaults.isCacheLayersByDefault());
info.setAutoCacheStyles(defaults.isCacheNonDefaultStyles());
for (String gsetId : defaults.getDefaultCachingGridSetIds()) {
XMLGridSubset subset = new XMLGridSubset();
subset.setGridSetName(gsetId);
info.getGridSubsets().add(subset);
}
info.getMimeFormats().addAll(defaults.getDefaultOtherCacheFormats());
info.setGutter(defaults.getGutter());
info.setMetaTilingX(defaults.getMetaTilingX());
info.setMetaTilingY(defaults.getMetaTilingY());
return info;
}
public static void addAutoStyleParameterFilter(final LayerInfo layer, GeoServerTileLayerInfo layerInfo){
StyleParameterFilter filter = new StyleParameterFilter();
filter.setLayer(layer);
layerInfo.removeParameterFilter("STYLES");
layerInfo.getParameterFilters().add(filter);
}
/**
* If the layer is configured for automatic style updates of its Style parameter filter, do so.
* @param layer The GeoServer layer
* @param layerInfo The GeoWebCache layer
*/
public static void checkAutomaticStyles(final LayerInfo layer, GeoServerTileLayerInfo layerInfo) {
ParameterFilter filter = layerInfo.getParameterFilter("STYLES");
// Update the filter with the latest available styles if it's a style filter
if(filter!=null && filter instanceof StyleParameterFilter) {
((StyleParameterFilter) filter).setLayer(layer);
}
}
/**
* If the layer is configured for automatic style updates of its Style parameter filter, do so.
* @param layer The GeoServer layer group
* @param layerInfo The GeoWebCache layer
*/
public static void checkAutomaticStyles(final LayerGroupInfo layer, GeoServerTileLayerInfo layerInfo) {
ParameterFilter filter = layerInfo.getParameterFilter("STYLES");
// Remove the filter as groups shouldn't have auto-updating styles
if(filter!=null && filter instanceof StyleParameterFilter) {
layerInfo.removeParameterFilter("STYLES");
}
}
/**
* Find a parameter filter by key from a set of filters.
* @param paramName
* @param parameterFilters
* @return
* @deprecated
*/
public static ParameterFilter findParameterFilter(final String paramName,
Set<ParameterFilter> parameterFilters) {
if (parameterFilters == null || parameterFilters.size() == 0) {
return null;
}
for (ParameterFilter pf : parameterFilters) {
if (paramName.equalsIgnoreCase(pf.getKey())) {
return pf;
}
}
return null;
}
/**
* Set the styles which should be cached on a layer
* @param info
* @param defaultStyle
* @param cachedStyles
*/
public static void setCachedStyles(GeoServerTileLayerInfo info, String defaultStyle,
Set<String> cachedStyles) {
StyleParameterFilter filter = (StyleParameterFilter) info.getParameterFilter("STYLES");
if(filter==null) filter = new StyleParameterFilter();
filter.setDefaultValue(defaultStyle);
filter.setStyles(cachedStyles);
info.addParameterFilter(filter);
}
/**
* Replace a filter with a new {@link StringParameterFilter}.
* @param tileLayerInfo layer to update the filter on
* @param paramKey key for the parameter
* @param createParam create a new filter if there is none to replace for the specified key
* @param defaultValue default value
* @param allowedValues legal values for the parameter
*/
public static void updateStringParameterFilter(final GeoServerTileLayerInfo tileLayerInfo,
final String paramKey, boolean createParam, final String defaultValue,
final String... allowedValues) {
Set<String> validValues = new HashSet<String>();
if (allowedValues != null) {
validValues.addAll(Arrays.asList(allowedValues));
}
updateStringParameterFilter(tileLayerInfo, paramKey, createParam, defaultValue, validValues);
}
/**
* Add a {@link StringParameterFilter} to the layer, replacing any existing filter for the same parameter.
* @param tileLayerInfo layer to update the filter on
* @param paramKey key for the parameter
* @param createParam create a new filter if there is none to replace for the specified key
* @param defaultValue default value
* @param allowedValues legal values for the parameter
*/
public static void updateStringParameterFilter(final GeoServerTileLayerInfo tileLayerInfo,
final String paramKey, boolean createParam, final String defaultValue,
final Set<String> allowedValues) {
createParam |= tileLayerInfo.removeParameterFilter(paramKey);
if (createParam && allowedValues != null && allowedValues.size() > 0) {
// make sure default value is among the list of allowed values
Set<String> values = new TreeSet<String>(allowedValues);
StringParameterFilter stringListFilter = new StringParameterFilter();
stringListFilter.setKey(paramKey);
stringListFilter.setDefaultValue(defaultValue == null ? "" : defaultValue);
values.addAll(stringListFilter.getValues());
stringListFilter.setValues(new ArrayList<String>(values));
tileLayerInfo.addParameterFilter(stringListFilter);
}
}
/**
* Remove a parameter filter from a layer
* @param tileLayerInfo the layer
* @param paramKey the key of the parameter filter
* @return true if a parameter matched and was removed, false otherwise
* @deprecated
*/
public static boolean removeParameterFilter(final GeoServerTileLayerInfo tileLayerInfo,
final String paramKey) {
return tileLayerInfo.removeParameterFilter(paramKey);
}
/**
* Add a {@link RegexpParameterFilter} set accept anything, replacing any existing filter for the same parameter.
* @param tileLayerInfo layer to update the filter on
* @param paramKey key for the parameter
* @param createParam create a new filter if there is none to replace for the specified key
*/
public static void updateAcceptAllRegExParameterFilter(
final GeoServerTileLayerInfo tileLayerInfo, final String paramKey, boolean createParam) {
createParam |= tileLayerInfo.removeParameterFilter(paramKey);
if (createParam) {
RegexParameterFilter filter = new RegexParameterFilter();
filter.setKey(paramKey);
filter.setDefaultValue("");
filter.setRegex(".*");
tileLayerInfo.addParameterFilter(filter);
}
}
/**
* Add a {@link FloatParameterFilter} set accept anything, replacing any existing filter for the same parameter.
* @param tileLayerInfo layer to update the filter on
* @param paramKey key for the parameter
* @param createParam create a new filter if there is none to replace for the specified key
*/
public static void updateAcceptAllFloatParameterFilter(final GeoServerTileLayerInfo tileLayerInfo,
final String paramKey, boolean createParam) {
createParam |= tileLayerInfo.removeParameterFilter(paramKey);
if (createParam) {
FloatParameterFilter filter = new FloatParameterFilter();
filter.setKey(paramKey);
filter.setDefaultValue("");
tileLayerInfo.addParameterFilter(filter);
}
}
}