org.apache.drill.exec.rpc.security.AuthStringUtil.java Source code

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Here is the source code for org.apache.drill.exec.rpc.security.AuthStringUtil.java

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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.drill.exec.rpc.security;

import com.google.common.base.Function;
import com.google.common.collect.Iterators;
import com.google.common.collect.Sets;

import javax.annotation.Nullable;
import java.util.List;
import java.util.Set;

public class AuthStringUtil {
    //  private static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(AuthStringUtil.class);

    // ignores case
    public static boolean listContains(final List<String> list, final String toCompare) {
        for (final String string : list) {
            if (string.equalsIgnoreCase(toCompare)) {
                return true;
            }
        }
        return false;
    }

    // converts list if strings to set of uppercase strings
    public static Set<String> asSet(final List<String> list) {
        if (list == null) {
            return Sets.newHashSet();
        }
        return Sets.newHashSet(Iterators.transform(list.iterator(), new Function<String, String>() {
            @Nullable
            @Override
            public String apply(@Nullable String input) {
                return input == null ? null : input.toUpperCase();
            }
        }));
    }

    // prevent instantiation
    private AuthStringUtil() {
    }
}