package com.temp.shared.utils;


/**
 * Utility methods around Objects to reduce the code in other places (e.g. the
 * Activities).
 *
 * @author georgs
 */
public class ObjectUtils {

    @SuppressWarnings("unchecked")
    public static <T> T cast(Object o) {
        return (T) o;
    }

    public static <T> boolean oneOf(T toTest, T... options) {
        if (toTest != null) {
            for (T option : options) {
                if (toTest.equals(option)) {
                    return true;
                }
            }
        }
        return false;
    }

    public static <T> T oneOfToString(String toTest, T... options) {
        if (toTest != null) {
            for (T option : options) {
                if (option != null && toTest.equals(option.toString())) {
                    return option;
                }
            }
        }
        return null;
    }

    public static <T> T oneOfIgnoreCase(String toTest, T... options) {
        if (toTest != null) {
            for (T option : options) {
                if (option != null && toTest.equalsIgnoreCase(option.toString())) {
                    return option;
                }
            }
        }
        return null;
    }

    public static <T> T deNull(T toTest, T defaultValue) {
        return (toTest != null) ? toTest : defaultValue;
    }

    public static boolean areEqual(Object o1, Object o2) {
        return (o1 == o2) || // Same Object or both null
                ((o1 != null) && o1.equals(o2));
    }

    public static <O,C extends Comparable<C>> boolean areEqual(O o1, O o2, NoEqualsHelper<O,C> noEqualsHelper) {
        return (o1 == o2) || // Same Object or both null
                areEqual(noEqualsHelper.getProxyValue(o1), noEqualsHelper.getProxyValue(o2));
    }

    /**
     * return the Simple Name of an Object (should NOT be used w/ Arrays).
     *
     * For inner classes the Simple Name is either the right side of the '$' if
     * it does NOT start with a digit, or the left side if it does!
     */
    public static String getSimpleClassName(Object o) {
        return (o == null) ? "null" : getSimpleName(o.getClass());
    }

    /**
     * return the Simple Name of a Class.
     *
     * For inner classes the Simple Name is either the right side of the '$' if
     * it does NOT start with a digit, or the left side if it does!
     */
    public static String getSimpleName(Class<?> klass) {
        if (klass == null) {
            return "null";
        }
        String name = "." + klass.getName();
        name = name.substring(name.lastIndexOf('.') + 1);
        for (int at; -1 != (at = name.lastIndexOf('$'));) {
            String right = StringUtils.noEmpty(name.substring(at + 1), "1"); // "1" force ignore if Empty
            char c = right.charAt(0);
            name = ((c < '0') || ('9' < c)) ? right : StringUtils.noEmpty(name.substring(0, at), "?"); // "?" if Empty
        }
        return name;
    }

    public static int hashCode(Object value) {
        return (value == null) ? 0 : value.hashCode();
    }

    public static int hashEm(Object... values) {
        int hashCode = 0;
        if (values != null) {
            for (Object value : values) {
                hashCode = (hashCode * 31) + hashCode(value);
            }
        }
        return hashCode;
    }

    public static <T> T oneOfToStringIgnoreCase( String value, T... options )
    {
        if ( (value != null) && (options != null) )
        {
            for ( T option : options )
            {
                if ( (option != null) && value.equalsIgnoreCase( option.toString() ) )
                {
                    return option;
                }
            }
        }
        return null;
    }
}