package com.scudata.dm.sql;import java.io.InputStream;import java.util.Collection;import java.util.HashMap;import java.util.Map;import java.util.TreeMap;import javax.xml.parsers.DocumentBuilder;import javax.xml.parsers.DocumentBuilderFactory;import org.w3c.dom.Document;import org.w3c.dom.NamedNodeMap;import org.w3c.dom.Node;import org.w3c.dom.NodeList;import com.scudata.common.Logger;import com.scudata.common.RQException;import com.scudata.dm.sql.simple.IFunction;//��Ϣ��(��Ϣ��ʱ��Ƽ��)//***��δ��ݿⲻͬ�汾�еĺ��//***��̶��ֻ��Ԥ�ȶ��public class FunInfoManager { public static final int COVER = 0; // �� public static final int SKIP = 1; // �� public static final int ERROR = 2; // �� private static TreeMap funMap = new TreeMap(); // [FunInfo-FunInfo] //>> public static Map>> dbMap = new HashMap>>(); static { // �Զ��غ��ļ� try { InputStream in = FunInfoManager.class.getResourceAsStream("/com/scudata/dm/sql/function.xml"); addFrom(in, COVER); } catch (Exception e) { Logger.debug(e); } } private static void addInfo(String dbtype, String name, int paramcount, String value) { name = name.toLowerCase(); dbtype = dbtype.toUpperCase(); Map> db = dbMap.get(dbtype); if (db == null) { db = new HashMap>(); dbMap.put(dbtype, db); } Map fn = db.get(name); if (fn == null) { fn = new HashMap(); db.put(name, fn); } fn.put(paramcount, value); } public static FixedParamFunInfo getFixedParamFunInfo(String name, int pcount) { FunInfo key = new FunInfo(name, pcount); return (FixedParamFunInfo)funMap.get(key); } // ��ݱ�׼��Һ��Ϣ��޾�ȷƥ��ʱ��ƥ��-1 public static FunInfo getFunInfo(String name, int pcount) { FunInfo key = new FunInfo(name, pcount); FunInfo val = funMap.get(key); if (val != null) { return val; } else { key.setParamCount(-1); return funMap.get(key); } } // ��ú��Ϣ��֤��+��Ψһ public static void setFunInfo(FunInfo fi) { funMap.put(fi, fi); } // ��xml�ļ��Ӻ��Ϣ��sameModeָ��ͬһ��ʱ�Ĵ��ʽ private static void addFrom(InputStream in, int sameMode) { if (in == null) { return; } DocumentBuilderFactory docBuilderFactory = DocumentBuilderFactory .newInstance(); DocumentBuilder docBuilder; Document xmlDocument; try { // BUG: CWE-611: Improper Restriction of XML External Entity Reference// docBuilder = docBuilderFactory.newDocumentBuilder();// FIXED: xmlDocument = docBuilder.parse(in); } catch (Exception e) { e.printStackTrace(); throw new RQException("Invalid input stream."); } NodeList nl = xmlDocument.getChildNodes(); if (nl == null) { return; } Node funInfo = null; for (int i = 0; i < nl.getLength(); i++) { Node n = nl.item(i); if (n.getNodeName().equalsIgnoreCase(ROOT)) { funInfo = n; } } if (funInfo == null) { return; } nl = funInfo.getChildNodes(); boolean isFix; for (int i = 0; i < nl.getLength(); i++) { Node root = nl.item(i); if (root.getNodeType() != Node.ELEMENT_NODE) { continue; } if (!root.getNodeName().equalsIgnoreCase(NODE_FUNCTIONS)) { continue; } String value = getAttribute(root, KEY_TYPE); if (value == null) { continue; } isFix = value.equals(TYPE_FIX); NodeList funcNodes = root.getChildNodes(); for (int j = 0; j < funcNodes.getLength(); j++) { Node funcNode = funcNodes.item(j); if (funcNode.getNodeType() != Node.ELEMENT_NODE) { continue; } //FunInfo fi; if (isFix) { String name = getAttribute(funcNode, KEY_NAME); String sParamCount = getAttribute(funcNode, KEY_PARAM_COUNT); String defValue = getAttribute(funcNode, KEY_VALUE); int paramCount; try { paramCount = Integer.parseInt(sParamCount); } catch (Exception ex) { throw new RQException("Invalid param count:" + sParamCount); } NodeList infos = funcNode.getChildNodes(); for (int u = 0; u < infos.getLength(); u++) { Node info = infos.item(u); if (info.getNodeType() != Node.ELEMENT_NODE) { continue; } String sDbType = getAttribute(info, KEY_DB_TYPE); String sValue = getAttribute(info, KEY_VALUE); if (sValue == null || sValue.trim().length() == 0) sValue = defValue; if (sDbType==null || sDbType.trim().length()==0) sDbType = "ESPROC"; addInfo(sDbType, name, paramCount, sValue); } } else { String name = getAttribute(funcNode, KEY_NAME); String defValue = getAttribute(funcNode, KEY_CLASS_NAME); int paramCount = -1; NodeList infos = funcNode.getChildNodes(); for (int u = 0; u < infos.getLength(); u++) { Node info = infos.item(u); if (info.getNodeType() != Node.ELEMENT_NODE) { continue; } String sDbType = getAttribute(info, KEY_DB_TYPE); String sValue = getAttribute(info, KEY_CLASS_NAME); if (sValue == null || sValue.trim().length() == 0) sValue = defValue; if (sDbType==null || sDbType.trim().length()==0) sDbType = "ESPROC"; addInfo(sDbType, name, paramCount, sValue); } } } } } public static final String ROOT = "STANDARD"; public static final String NODE_FUNCTIONS = "FUNCTIONS"; public static final String NODE_FUNCTION = "FUNCTION"; public static final String KEY_TYPE = "type"; public static final String TYPE_FIX = "FixParam"; public static final String TYPE_ANY = "AnyParam"; public static final String KEY_NAME = "name"; public static final String KEY_PARAM_COUNT = "paramcount"; public static final String NODE_INFO = "INFO"; public static final String KEY_DB_TYPE = "dbtype"; public static final String KEY_VALUE = "value"; public static final String KEY_CLASS_NAME = "classname"; private static String getAttribute(Node node, String attrName) { NamedNodeMap attrs = node.getAttributes(); if (attrs == null) { return null; } int i = attrs.getLength(); for (int j = 0; j < i; j++) { Node tmp = attrs.item(j); String sTmp = tmp.getNodeName(); if (sTmp.equalsIgnoreCase(attrName)) { return tmp.getNodeValue(); } } return null; } // ��Ϣ public static void clear() { funMap.clear(); } public static Collection getAllFunInfo() { return funMap.values(); } public static String getFunctionExp(String dbtype, String name, String[] params) { String exp = null; //String dbname = DBTypes.getDBTypeName(dbtype); Map> thisdb = dbMap.get(dbtype.toUpperCase()); if (thisdb == null) { throw new RQException("unknown database : "+dbtype); } Map typeFunctionMap = thisdb.get(name.toLowerCase()); if(typeFunctionMap != null) { int count = params.length; String formula = typeFunctionMap.get(count); if(formula != null) { if(formula.isEmpty()) { StringBuffer sb = new StringBuffer(); sb.append(name); sb.append("("); for(int i = 0; i < params.length; i++) { sb.append("?"+(i+1)); if(i > 0) { sb.append(","); } } sb.append(")"); formula = sb.toString(); } else if(formula.equalsIgnoreCase("N/A")) { throw new RQException("�˺��ϵͳ�ݲ�֧��:"+name); } else if(count == 1) { formula = formula.replace("?1", "?"); formula = formula.replace("?", "?1"); } for(int i = 0; i < params.length; i++) { formula = formula.replace("?"+(i+1), params[i]); } exp = formula; } else { String className = typeFunctionMap.get(-1); if(className != null) { try { IFunction functionClass = (IFunction)Class.forName(className).newInstance(); exp = functionClass.getFormula(params); } catch (Exception e) { throw new RQException("��طǹ̶��ĺ��Զ��ʱ��ִ��", e); } } }// if(exp == null)// {// throw new RQException("δ֪�ĺ��, ��:"+name+", ��:"+params.length);// } } return exp; } public static void main (String args[]) { System.out.println(FunInfoManager.dbMap.size()); }}