com.microsoft.azure.cosmosdb.rx.internal.Utils Maven / Gradle / Ivy

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/*
 * The MIT License (MIT)
 * Copyright (c) 2018 Microsoft Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
package com.microsoft.azure.cosmosdb.rx.internal;

import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

/**
 * While this class is public, but it is not part of our published public APIs.
 * This is meant to be internally used only by our sdk.
 */
public class Utils {

    public static int getValueOrDefault(Integer val, int defaultValue) {
        return val != null ? val.intValue() : defaultValue;
    }

    public static void checkStateOrThrow(boolean value, String argumentName, String message) throws IllegalArgumentException {

        IllegalArgumentException t = checkStateOrReturnException(value, argumentName, message);
        if (t != null) {
            throw t;
        }
    }

    public static void checkNotNullOrThrow(Object val, String argumentName, String message) throws NullPointerException {

        NullPointerException t = checkNotNullOrReturnException(val, argumentName, message);
        if (t != null) {
            throw t;
        }
    }

    public static void checkStateOrThrow(boolean value, String argumentName, String messageTemplate, Object... messageTemplateParams) throws IllegalArgumentException {
        IllegalArgumentException t = checkStateOrReturnException(value, argumentName, argumentName, messageTemplateParams);
        if (t != null) {
            throw t;
        }
    }

    public static IllegalArgumentException checkStateOrReturnException(boolean value, String argumentName, String message) {

        if (value) {
            return null;
        }

        return new IllegalArgumentException(String.format("argumentName: %s, message: %s", argumentName, message));
    }

    public static IllegalArgumentException checkStateOrReturnException(boolean value, String argumentName, String messageTemplate, Object... messageTemplateParams) {
        if (value) {
            return null;
        }

        return new IllegalArgumentException(String.format("argumentName: %s, message: %s", argumentName, String.format(messageTemplate, messageTemplateParams)));
    }

    private static NullPointerException checkNotNullOrReturnException(Object val, String argumentName, String messageTemplate, Object... messageTemplateParams) {
        if (val != null) {
            return null;
        }

        return new NullPointerException(String.format("argumentName: %s, message: %s", argumentName, String.format(messageTemplate, messageTemplateParams)));
    }

    public static BadRequestException checkRequestOrReturnException(boolean value, String argumentName, String message) {

        if (value) {
            return null;
        }

        return new BadRequestException(String.format("argumentName: %s, message: %s", argumentName, message));
    }

    public static BadRequestException checkRequestOrReturnException(boolean value, String argumentName, String messageTemplate, Object... messageTemplateParams) {
        if (value) {
            return null;
        }

        return new BadRequestException(String.format("argumentName: %s, message: %s", argumentName, String.format(messageTemplate, messageTemplateParams)));
    }

    @SuppressWarnings("unchecked")
    public static  O as(I i, Class klass) {
        if (i == null) {
            return null;
        }

        if (klass.isInstance(i)) {
            return (O) i;
        } else {
            return null;
        }
    }
    
    @SuppressWarnings("unchecked")
    public static  List immutableListOf() {
        return Collections.EMPTY_LIST;
    }
    
    public static  List immutableListOf(V v1) {
        List list = new ArrayList<>();
        list.add(v1);
        return Collections.unmodifiableList(list);
    }
    
    public static  MapimmutableMapOf() {
        return Collections.emptyMap();
    }
    
    public static  MapimmutableMapOf(K k1, V v1) {
        Map map = new HashMap();
        map.put(k1,  v1);
        map = Collections.unmodifiableMap(map);
        return map;
    }

    public static  V firstOrDefault(List list) {
        return list.size() > 0? list.get(0) : null ;
    }

    public static class ValueHolder {

        public ValueHolder() {
        }

        public ValueHolder(V v) {
            this.v = v;
        }
        public V v;

        public static  ValueHolder initialize(T v) {
            return new ValueHolder(v);
        }
    }

    public static  boolean tryGetValue(Map dictionary, K key, ValueHolder holder) {
        // doesn't work for dictionary with null value
        holder.v = dictionary.get(key);
        return holder.v != null;
    }

    public static  boolean tryRemove(Map dictionary, K key, ValueHolder holder) {
        // doesn't work for dictionary with null value
        holder.v = dictionary.remove(key);
        return holder.v != null;
    }
}