/*
 * Copyright 2013 Andriy Vityuk
 *
 * Licensed 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 com.vityuk.ginger.util;

import java.io.Closeable;
import java.io.IOException;
import java.util.HashSet;
import java.util.Set;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 * Lot of misc utils
 */
public class MiscUtils {
    static final Logger logger = Logger.getLogger(MiscUtils.class.getName());

    public static void closeQuietly(Closeable closeable) {
        if (closeable == null) {
            return;
        }
        try {
            closeable.close();
        } catch (IOException e) {
            logger.log(Level.WARNING, "IOException thrown while closing Closeable.", e);
        }
    }

    private static final Set<Class<?>> WRAPPER_TYPES = getWrapperTypes();

    public static boolean isWrapperType(Class<?> clazz)
    {
        return WRAPPER_TYPES.contains(clazz);
    }

    private static Set<Class<?>> getWrapperTypes()
    {
        Set<Class<?>> ret = new HashSet<Class<?>>();
        ret.add(Boolean.class);
        ret.add(Character.class);
        ret.add(Byte.class);
        ret.add(Short.class);
        ret.add(Integer.class);
        ret.add(Long.class);
        ret.add(Float.class);
        ret.add(Double.class);
        ret.add(Void.class);
        return ret;
    }

    public static int indexOf(char[] array, char target) {
        return indexOf(array, target, 0, array.length);
    }

    private static int indexOf(
            char[] array, char target, int start, int end) {
        for (int i = start; i < end; i++) {
            if (array[i] == target) {
                return i;
            }
        }
        return -1;
    }

    public static boolean equal(Object a, Object b) {
        return a == b || (a != null && a.equals(b));
    }

    public static RuntimeException propagate(Throwable throwable) {
        throwable = Preconditions.checkNotNull(throwable);
        if (throwable instanceof Error) {
            throw (Error)throwable;
        } else if (throwable instanceof RuntimeException) {
            throw (RuntimeException)throwable;
        }
        throw new RuntimeException(throwable);
    }
}