abstractrecord.cs

一种.net实现ajax方法的类库

        public static void UnregisterChangedListener(Type type, RecordHandler handler)
        {
            changedRecordListeners[type] -= handler;
        }

        public static bool TypeIsRecordList(Type t)
        {
            if (t.Name == "IRecordList`1") return true;
            Type[] interfaces = t.GetInterfaces();
            foreach (Type iface in interfaces)
                if (iface.Name == "IRecordList`1")
                    return true;
            return false;
        }

        public static explicit operator int(AbstractRecord r)
        {
            return r.Id;
        }

        private static Dictionary<Type, MethodInfo> typeLoaderMethods = new Dictionary<Type, MethodInfo>();
        public static object[] intParamArray = new object[] { 1 };
        public static AbstractRecord Load(Type t, int id)
        {
            if( ! typeLoaderMethods.ContainsKey(t) )
            {
                MethodInfo mi = t.GetMethod("Load",BindingFlags.Public|BindingFlags.Static|BindingFlags.FlattenHierarchy,null,
                    new Type[]{typeof(int)},null);
                typeLoaderMethods[t] = mi.MakeGenericMethod(t);
            }
            intParamArray[0] = id;
            return (AbstractRecord)typeLoaderMethods[t].Invoke(null, intParamArray);
        }

        virtual protected RecordList<C> LoadChildren<C>(ColumnInfo fi) where C : AbstractRecord, new() {throw new Exception("AbstractRecord.LoadChildren not implemented.");}

        protected static PropertyTypeAttribute getPropertyTypeAttribute(PropertyInfo prop)
        {
            PropertyTypeAttribute[] ptas = prop.GetCustomAttributes(typeof(PropertyTypeAttribute), true) as PropertyTypeAttribute[];
            PropertyTypeAttribute pta = null;
            if (ptas != null && ptas.Length > 0)
            {
                pta = ptas[0];
            }
            return pta;
        }

        protected static List<PropertyInfo> DiscoverDerivedProperties(Type modelType)
        {
            List<PropertyInfo> properties = new List<PropertyInfo>();
            PropertyInfo[] derivedProperties = modelType.GetProperties();
            PropertyInfo[] baseProperties = modelType.BaseType.GetProperties();
            foreach (PropertyInfo dp in derivedProperties)
            {
                bool inBase = false;
                foreach (PropertyInfo bp in baseProperties)
                {
                    if (dp.Name == bp.Name)
                    {
                        inBase = true;
                    }
                }
                if (!inBase)
                {
                    properties.Add(dp);
                }
            }
            return properties;
        }

        #region randomWordStuffer
        static protected Random r;
		static string[] words;
        static Dictionary<string,List<string>> source = new Dictionary<string,List<string>>();
		static AbstractRecord()
		{
			r = new Random();
            #region wordset
            string wordset = @"Champagne (province)
				From Wikipedia,  free encyclopedia.

				Champagne is one of  traditional provinces of France, a region of France that is best known for  production of  sparkling white wine that bears  region's name.

				Champagne is now part of  French administrative region of Champagne-Ardenne.
				[edit]

				History

				Until 1284  County of Champagne was in essence an independent territory, whose count nominally owed fealty to  king of France.
				[edit]

				 Champagne fairs

				 Champagne fairs were a circuit of six cloth fairs in  towns of Champagne and Brie, changing location every two months and spanning  year from January to October. At their height, in  13th century,  Champagne fairs linked  cloth-producing cities of  Low Countries with  Italian dyeing and exporting centers.  fairs, which were already well-organized at  start of  century, were one of  earliest manifestations of a linked European economy, which characterizes  High Middle Ages.  towns provided huge warehouses (still to be seen at Provins). From  north came woollens and linen cloth. From  south came pepper and other spices, drugs, coinage and new conceptions of credit and bookkeeping. Goods converged from Spain, travelling along  well-established pilgrim route from Santiago de Compostela, and from Germany. Once  cloth sales had been concluded,  reckoning of credit at  tables (banche) of Italian money-changers effected compensatory payments for goods, established future payments on credit, made loans to princes and lords, and settled bills of exchange, which were generally worded to expire at one of  Champagne fairs. Italian credit was able to exploit every exchange in  process, and Italian cloth merchants, depending on  northern production for their trade in  Levant, became  great bankers of  later Middle Ages.

				It was to  interest of  Count of Champagne, virtually independent of his nominal suzerain,  King of France, to extend  liberties and prerogatives of  towns. Traditional historians have dated  decline of  Champagne fairs to  conquest of Champagne by Philip  Bold in 1273 and its inclusion within  Crown of France by Philip IV in 1284. A sea route had been established, inaugurated by  first appearance of Genoese ships in Antwerp in 1277.
On  Duty of Civil Disobedience
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by Henry David Thoreau

I heartily accept  motto, ""That government is best which governs least""; and I should like to see it acted up to more rapidly and systematically. Carried out, it finally amounts to this, which also I believe--""That government is best which governs not at all""; and when men are prepared for it, that will be  kind of government which they will have. Government is at best but an expedient; but most governments are usually, and all governments are sometimes, inexpedient.  objections which have been brought against a standing army, and they are many and weighty, and deserve to prevail, may also at last be brought against a standing government.  standing army is only an arm of  standing government.  government itself, which is only  mode which  people have chosen to execute their will, is equally liable to be abused and perverted before  people can act through it. Witness  present Mexican war,  work of comparatively a few individuals using  standing government as their tool; for in  outset,  people would not have consented to this measure.

This American government--what is it but a tradition, though a recent one, endeavoring to transmit itself unimpaired to posterity, but each instant losing some of its integrity? It has not  vitality and force of a single living man; for a single man can bend it to his will. It is a sort of wooden gun to  people themselves. But it is not  less necessary for this; for  people must have some complicated machinery or other, and hear its din, to satisfy that idea of government which they have. Governments show thus how successfully men can be imposed upon, even impose on themselves, for their own advantage. It is excellent, we must all allow. Yet this government never of itself furthered any enterprise, but by  alacrity with which it got out of its way. It does not keep  country free. It does not settle  West. It does not educate.  character inherent in  American people has done all that has been accomplished; and it would have done somewhat more, if  government had not sometimes got in its way. For government is an expedient, by which men would fain succeed in letting one another alone; and, as has been said, when it is most expedient,  governed are most let alone by it. Trade and commerce, if they were not made of india-rubber, would never manage to bounce over obstacles which legislators are continually putting in their way; and if one were to judge these men wholly by  effects of their actions and not partly by their intentions, they would deserve to be classed and punished with those mischievious persons who put obstructions on  railroads.

But, to speak practically and as a citizen, unlike those who call themselves no-government men, I ask for, not at once no government, but at once a better government. Let every man make known what kind of government would command his respect, and that will be one step toward obtaining it.

After all,  practical reason why, when  power is once in  hands of  people, a majority are permitted, and for a long period continue, to rule is not because they are most likely to be in  right, nor because this seems fairest to  minority, but because they are physically  strongest. But a government in which  majority rule in all cases can not be based on justice, even as far as men understand it. Can there not be a government in which  majorities do not virtually decide right and wrong, but conscience?--in which majorities decide only those questions to which  rule of expediency is applicable? Must  citizen ever for a moment, or in  least degree, resign his conscience to  legislator? Why has every man a conscience then? I think that we should be men first, and subjects afterward. It is not desirable to cultivate a respect for  law, so much as for  right.  only obligation which I have a right to assume is to do at any time what I think right. It is truly enough said that a corporation has no conscience; but a corporation on conscientious men is a corporation with a conscience. Law never made men a whit more just; and, by means of their respect for it, even  well-disposed are daily made  agents on injustice. A common and natural result of an undue respect for  law is, that you may see a file of soldiers, colonel, captain, corporal, privates, powder-monkeys, and all, marching in admirable order over hill and dale to  wars, against their wills, ay, against their common sense and consciences, which makes it very steep marching indeed, and produces a palpitation of  heart. They have no doubt that it is a damnable business in which they are concerned; they are all peaceably inclined. Now, what are they? Men at all? or small movable forts and magazines, at  service of some unscrupulous man in power? Visit  Navy Yard, and behold a marine, such a man as an American government can make, or such as it can make a man with its black arts--a mere shadow"";

and reminiscence of humanity, a man laid out alive and standing, and already, as one may say, buried under arms with funeral accompaniment, though it may be,

""Not a drum was heard, not a funeral note,