utilmisc.java

Sequoia ERP是一个真正的企业级开源ERP解决方案。它提供的模块包括：电子商务应用(e-commerce), POS系统(point of sales),知识管理,存货与仓库管理

            if (value instanceof Double) {
                return ((Double) value).doubleValue();
            } else if (value instanceof String) {
                return Double.parseDouble((String) value);
            }
        }
        return 0.0;
    }

    /**
     * Adds value to the key entry in theMap, or creates a new one if not already there
     * @param theMap
     * @param key
     * @param value
     */
    public static void addToDoubleInMap(Map theMap, Object key, Double value) {
        Double curValue = (Double) theMap.get(key);
        if (curValue != null) {
            theMap.put(key, new Double(curValue.doubleValue() + value.doubleValue()));
        } else {
            theMap.put(key, value);
        }
    }
    
    /**
     * Parse a locale string Locale object
     * @param localeString The locale string (en_US)
     * @return Locale The new Locale object or null if no valid locale can be interpreted
     */
    public static Locale parseLocale(String localeString) {
        if (localeString == null || localeString.length() == 0) {
            return null;
        }

        Locale locale = null;
        if (localeString.length() == 2) {
            // two letter language code
            locale = new Locale(localeString);
        } else if (localeString.length() == 5) {
            // positions 0-1 language, 3-4 are country
            String language = localeString.substring(0, 2);
            String country = localeString.substring(3, 5);
            locale = new Locale(language, country);
        } else if (localeString.length() > 6) {
            // positions 0-1 language, 3-4 are country, 6 and on are special extensions
            String language = localeString.substring(0, 2);
            String country = localeString.substring(3, 5);
            String extension = localeString.substring(6);
            locale = new Locale(language, country, extension);
        } else {
            Debug.logWarning("Do not know what to do with the localeString [" + localeString + "], should be length 2, 5, or greater than 6, returning null", module);
        }

        return locale;
    }

    /** The input can be a String, Locale, or even null and a valid Locale will always be returned; if nothing else works, returns the default locale.
     * @param localeObject An Object representing the locale
     */
    public static Locale ensureLocale(Object localeObject) {
        if (localeObject != null && localeObject instanceof String) {
            localeObject = UtilMisc.parseLocale((String) localeObject);
        }
        if (localeObject != null && localeObject instanceof Locale) {
            return (Locale) localeObject;
        }
        return Locale.getDefault();
    }

    public static List availableLocaleList = null;
    /** Returns a List of available locales sorted by display name */
    public static List availableLocales() {
        if (availableLocaleList == null) {
            synchronized(UtilMisc.class) {
                if (availableLocaleList == null) {
                    TreeMap localeMap = new TreeMap();
                    Locale[] locales = Locale.getAvailableLocales();
                    for (int i = 0; i < locales.length; i++) {
                        localeMap.put(locales[i].getDisplayName(), locales[i]);
                    }
                    availableLocaleList = new LinkedList(localeMap.values());
                }
            }
        }
        return availableLocaleList;
    }

    /** This is meant to be very quick to create and use for small sized maps, perfect for how we usually use UtilMisc.toMap */
    protected static class SimpleMap implements Map, java.io.Serializable {
        protected Map realMapIfNeeded = null;

        String[] names;
        Object[] values;

        public SimpleMap() {
            names = new String[0];
            values = new Object[0];
        }

        public SimpleMap(String name1, Object value1) {
            names = new String[1];
            values = new Object[1];
            this.names[0] = name1;
            this.values[0] = value1;
        }

        public SimpleMap(String name1, Object value1, String name2, Object value2) {
            names = new String[2];
            values = new Object[2];
            this.names[0] = name1;
            this.values[0] = value1;
            this.names[1] = name2;
            this.values[1] = value2;
        }

        public SimpleMap(String name1, Object value1, String name2, Object value2, String name3, Object value3) {
            names = new String[3];
            values = new Object[3];
            this.names[0] = name1;
            this.values[0] = value1;
            this.names[1] = name2;
            this.values[1] = value2;
            this.names[2] = name3;
            this.values[2] = value3;
        }

        public SimpleMap(String name1, Object value1, String name2, Object value2, String name3, Object value3, String name4, Object value4) {
            names = new String[4];
            values = new Object[4];
            this.names[0] = name1;
            this.values[0] = value1;
            this.names[1] = name2;
            this.values[1] = value2;
            this.names[2] = name3;
            this.values[2] = value3;
            this.names[3] = name4;
            this.values[3] = value4;
        }

        protected void makeRealMap() {
            realMapIfNeeded = FastMap.newInstance();
            for (int i = 0; i < names.length; i++) {
                realMapIfNeeded.put(names[i], values[i]);
            }
            this.names = null;
            this.values = null;
        }

        public void clear() {
            if (realMapIfNeeded != null) {
                realMapIfNeeded.clear();
            } else {
                realMapIfNeeded = FastMap.newInstance();
                names = null;
                values = null;
            }
        }

        public boolean containsKey(Object obj) {
            if (realMapIfNeeded != null) {
                return realMapIfNeeded.containsKey(obj);
            } else {
                for (int i = 0; i < names.length; i++) {
                    if (obj == null && names[i] == null) return true;
                    if (names[i] != null && names[i].equals(obj)) return true;
                }
                return false;
            }
        }

        public boolean containsValue(Object obj) {
            if (realMapIfNeeded != null) {
                return realMapIfNeeded.containsValue(obj);
            } else {
                for (int i = 0; i < names.length; i++) {
                    if (obj == null && values[i] == null) return true;
                    if (values[i] != null && values[i].equals(obj)) return true;
                }
                return false;
            }
        }

        public java.util.Set entrySet() {
            if (realMapIfNeeded != null) {
                return realMapIfNeeded.entrySet();
            } else {
                this.makeRealMap();
                return realMapIfNeeded.entrySet();
            }
        }

        public Object get(Object obj) {
            if (realMapIfNeeded != null) {
                return realMapIfNeeded.get(obj);
            } else {
                for (int i = 0; i < names.length; i++) {
                    if (obj == null && names[i] == null) return values[i];
                    if (names[i] != null && names[i].equals(obj)) return values[i];
                }
                return null;
            }
        }

        public boolean isEmpty() {
            if (realMapIfNeeded != null) {
                return realMapIfNeeded.isEmpty();
            } else {
                if (this.names.length == 0) return true;
                return false;
            }
        }

        public java.util.Set keySet() {
            if (realMapIfNeeded != null) {
                return realMapIfNeeded.keySet();
            } else {
                this.makeRealMap();
                return realMapIfNeeded.keySet();
            }
        }

        public Object put(Object obj, Object obj1) {
            if (realMapIfNeeded != null) {
                return realMapIfNeeded.put(obj, obj1);
            } else {
                this.makeRealMap();
                return realMapIfNeeded.put(obj, obj1);
            }
        }

        public void putAll(java.util.Map map) {
            if (realMapIfNeeded != null) {
                realMapIfNeeded.putAll(map);
            } else {
                this.makeRealMap();
                realMapIfNeeded.putAll(map);
            }
        }

        public Object remove(Object obj) {
            if (realMapIfNeeded != null) {
                return realMapIfNeeded.remove(obj);
            } else {
                this.makeRealMap();
                return realMapIfNeeded.remove(obj);
            }
        }

        public int size() {
            if (realMapIfNeeded != null) {
                return realMapIfNeeded.size();
            } else {
                return this.names.length;
            }
        }

        public java.util.Collection values() {
            if (realMapIfNeeded != null) {
                return realMapIfNeeded.values();
            } else {
                this.makeRealMap();
                return realMapIfNeeded.values();
            }
        }

        public String toString() {
            if (realMapIfNeeded != null) {
                return realMapIfNeeded.toString();
            } else {
                StringBuffer outString = new StringBuffer("{");
                for (int i = 0; i < names.length; i++) {
                    if (i > 0) outString.append(',');
                    outString.append('{');
                    outString.append(names[i]);
                    outString.append(',');
                    outString.append(values[i]);
                    outString.append('}');
                }
                outString.append('}');
                return outString.toString();
            }
        }

        public int hashCode() {
            if (realMapIfNeeded != null) {
                return realMapIfNeeded.hashCode();
            } else {
                int hashCode = 0;
                for (int i = 0; i < names.length; i++) {
                    //note that this calculation is done based on the calc specified in the Java java.util.Map interface
                    int tempNum = (names[i] == null   ? 0 : names[i].hashCode()) ^
                            (values[i] == null ? 0 : values[i].hashCode());
                    hashCode += tempNum;
                }
                return hashCode;
            }
        }

        public boolean equals(Object obj) {
            if (realMapIfNeeded != null) {
                return realMapIfNeeded.equals(obj);
            } else {
                Map mapObj = (Map) obj;

                //first check the size
                if (mapObj.size() != names.length) return false;

                //okay, same size, now check each entry
                for (int i = 0; i < names.length; i++) {
                    //first check the name
                    if (!mapObj.containsKey(names[i])) return false;

                    //if that passes, check the value
                    Object mapValue = mapObj.get(names[i]);
                    if (mapValue == null) {
                        if (values[i] != null) return false;
                    } else {
                        if (!mapValue.equals(values[i])) return false;
                    }
                }

                return true;
            }
        }
    }
}