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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.knox.gateway;
import org.apache.knox.gateway.descriptor.FilterDescriptor;
import org.apache.knox.gateway.descriptor.FilterParamDescriptor;
import org.apache.knox.gateway.descriptor.GatewayDescriptor;
import org.apache.knox.gateway.descriptor.GatewayParamDescriptor;
import org.apache.knox.gateway.descriptor.ResourceDescriptor;
import org.apache.knox.gateway.descriptor.ResourceParamDescriptor;
import java.net.URISyntaxException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public class GatewayFactory {
// public static GatewayFilter create( Config gatewayConfig ) throws URISyntaxException {
// GatewayFilter gateway = new GatewayFilter();
// for( Config service : gatewayConfig.getChildren().values() ) {
// addService( gateway, service );
// }
// return gateway;
// }
//
// private static void addService( GatewayFilter gateway, Config serviceConfig ) throws URISyntaxException {
// for( Config filterConfig : serviceConfig.getChildren().values() ) {
// addFilter( gateway, filterConfig );
// }
// }
//
// private static void addFilter( GatewayFilter gateway, Config filterConfig ) throws URISyntaxException {
// String source = filterConfig.get( "pattern" );
// String name = filterConfig.get( "name" );
// String clazz = filterConfig.get( "class" );
// gateway.addFilter( source, name, clazz, filterConfig );
// }
public static GatewayFilter create( GatewayDescriptor descriptor ) throws URISyntaxException {
GatewayFilter filter = new GatewayFilter();
for( ResourceDescriptor resource : descriptor.resources() ) {
addResource( filter, resource );
}
return filter;
}
private static void addResource( GatewayFilter gateway, ResourceDescriptor resource ) throws URISyntaxException {
for( FilterDescriptor filter : resource.filters() ) {
addFilter( gateway, filter );
}
}
private static void addFilter( GatewayFilter gateway, FilterDescriptor filter ) throws URISyntaxException {
String name = filter.name();
if( name == null ) {
name = filter.role();
}
gateway.addFilter( filter.up().pattern(), name, filter.impl(), createParams( filter ), filter.up().role() );
}
private static Map createParams( FilterDescriptor filter ) {
Map paramMap = new HashMap<>();
ResourceDescriptor resource = filter.up();
GatewayDescriptor gateway = resource.up();
for( GatewayParamDescriptor param : gateway.params() ) {
paramMap.put( param.name(), param.value() );
}
for( ResourceParamDescriptor param : resource.params() ) {
paramMap.put( param.name(), param.value() );
}
//TODO: Should all elements of the resource and gateway descriptor somehow be added to the filter params?
//TODO: Should we use some composite params object instead of copying all these name value pairs?
paramMap.put( "pattern", resource.pattern() );
List paramList = filter.params();
for( FilterParamDescriptor param : paramList ) {
paramMap.put( param.name(), param.value() );
}
return paramMap;
}
}
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