package net.sourceforge.pain.db;

/**
 * All supported PAiN DB field types
 */
public final class DbType {

    public static final int BOOLEAN = 1;
    public static final int BYTE = 2;
    public static final int CHAR = 3;
    public static final int DOUBLE = 4;
    public static final int FLOAT = 5;
    public static final int INT = 6;
    public static final int LONG = 7;
    public static final int SHORT = 8;
    public static final int STRING = 9;
    public static final int REFERENCE = 10;

    public static final int ARRAY_OF_BYTE = 12;
    public static final int ARRAY_OF_CHAR = 13;
    public static final int ARRAY_OF_INT = 16;
    public static final int ARRAY_OF_STRING = 19;

    public static final int LINKED_LIST = 20; //only references list is supported!
    public static final int ARRAY_LIST = 21; //only references list is supported!
    public static final int INT_KEY_MAP = 22; // only int(Integers) allowed as keys, values are DbObject instances or null
    public static final int STRING_KEY_MAP = 23; // only Strings is allowed as keys, values are DbObject instances or null
    public static final int REFERENCE_SET = 24; // set of DbObjects
    public static final int STRING_SET = 25; // set of Strings
    public static final int STRING_MAP = 26; // map of strings with values of Strings

    private static String[] typeNames = new String[27];

    static {
        typeNames[BOOLEAN] = "boolean";
        typeNames[BYTE] = "byte";
        typeNames[CHAR] = "char";
        typeNames[DOUBLE] = "double";
        typeNames[FLOAT] = "float";
        typeNames[INT] = "int";
        typeNames[LONG] = "long";
        typeNames[SHORT] = "short";
        typeNames[STRING] = "String";
        typeNames[REFERENCE] = "reference";

        typeNames[ARRAY_OF_BYTE] = "byte[]";
        typeNames[ARRAY_OF_CHAR] = "char[]";
        typeNames[ARRAY_OF_INT] = "int[]";
        typeNames[ARRAY_OF_STRING] = "String[]";

        typeNames[LINKED_LIST] = "LinkedList";
        typeNames[ARRAY_LIST] = "ArrayList";
        typeNames[INT_KEY_MAP] = "IntKeyMap";
        typeNames[STRING_KEY_MAP] = "StringKeyMap";
        typeNames[REFERENCE_SET] = "ReferenceSet";
        typeNames[STRING_SET] = "StringSet";
        typeNames[STRING_MAP] = "StringMap";
    }


    static final boolean isValidDbType(final int type) {
        return (type > 0 && type <= 10) || type == 12 || type == 13 || type == 16 || (type >= 19 && type <= 26);
    }

    /**
     * @return String name for the specified type
     */
    public static String name(int type) {
        String name = (type > 0 && type < typeNames.length ? typeNames[type] : null);
        if (name == null) {
            throw new IllegalArgumentException("Illegal type:" + type);
        }
        return name;
    }

    public static boolean isArray(int type) {
        return type == ARRAY_OF_BYTE || type == ARRAY_OF_CHAR || type == ARRAY_OF_INT || type == ARRAY_OF_STRING;
    }

    public static boolean isCollection(int type) {
        switch (type) {
            case LINKED_LIST:
            case ARRAY_LIST:
            case INT_KEY_MAP:
            case STRING_KEY_MAP:
            case REFERENCE_SET:
            case STRING_SET:
            case STRING_MAP:
                return true;
        }
        return false;


    }

}