eagle-security/eagle-security-common/src/main/java/org/apache/eagle/security/resolver/AbstractSensitivityTypeResolver.java

/*
 * 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.eagle.security.resolver;


import org.apache.eagle.service.alert.resolver.AttributeResolvable;
import org.apache.eagle.service.alert.resolver.AttributeResolveException;
import org.apache.eagle.service.alert.resolver.BadAttributeResolveRequestException;
import org.apache.eagle.service.alert.resolver.GenericAttributeResolveRequest;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.regex.Pattern;

public abstract class AbstractSensitivityTypeResolver implements AttributeResolvable<GenericAttributeResolveRequest,String> {
    private final static Logger LOG = LoggerFactory.getLogger(AbstractSensitivityTypeResolver.class);
    private Map<String, Map<String, String>> sensitivityMaps;
    private final static String SENSITIVE_TYPE_ATTRIBUTE_RESOLVE_FORMAT_HINT = "Sensitive type should be composed of a-z, A-Z, 0-9 or -";

    public abstract void init();

    public void setSensitivityMaps(Map<String, Map<String, String>> maps) {
        this.sensitivityMaps = maps;
    }

    public List<String> resolve(GenericAttributeResolveRequest request) throws AttributeResolveException {
        init();
        String query = request.getQuery().trim();
        String site = request.getSite().trim();
        List<String> res = new ArrayList<>();
        Map<String, String> map = sensitivityMaps.get(site);

        if(map == null) {
            return res;
        }
        List<String> sensitiveTypes = new ArrayList<>(map.values());

        for(String type : sensitiveTypes) {
            Pattern pattern = Pattern.compile("^" + query, Pattern.CASE_INSENSITIVE);
            if(pattern.matcher(type).find()) {
                res.add(type);
            }
        }
        if(res.size() == 0) {
            return sensitiveTypes;
        }
        return res;
    }

    @Override
    public void validateRequest(GenericAttributeResolveRequest request) throws BadAttributeResolveRequestException {
        String query = request.getQuery();
        if (query == null || !Pattern.matches("\\w+", query)) {
            throw new BadAttributeResolveRequestException(SENSITIVE_TYPE_ATTRIBUTE_RESOLVE_FORMAT_HINT);
        }
    }

    @Override
    public Class<GenericAttributeResolveRequest> getRequestClass() {
        return GenericAttributeResolveRequest.class;
    }

}