public class BuildGraph1 {
// Members of the House to be inserted in the database
final static Object houseMemberData[][] = {
// memberName, crownName, houseHead, yearBorn, yearDied, reignStart, reignEnd, crownTitle
{ "Carlo Bonaparte", null, false, 1746, 1785, null, null, null },
{ "Letizia Ramolino", null, false, 1750, 1836, null, null, null },
{ "Joseph Bonaparte", "Joseph I", false, 1768, 1844, "6 Jun 1808", "11 Dec 1813", "King of Spain" },
{ "Napoleon Bonaparte", "Napoleon I", false, 1769, 1821, "18 May 1804", "22 Jun 1815", "Emperor of the French" },
{ "Lucien Bonaparte", null, false, 1775, 1840, null, null, null },
{ "Elisa Bonaparte", "Elisa Bonaparte", false, 1777, 1820, "3 Mar 1809", "1 Feb 1814", "Grand Duchess of Tuscany" },
{ "Louis Bonaparte", "Louis I", false, 1778, 1846, "5 Jun 1806", "1 Jul 1810", "King of Holland" },
{ "Pauline Bonaparte", null, false, 1780, 1825, null, null, null },
{ "Caroline Bonaparte", null, false, 1782, 1839, null, null, null },
{ "Jerome Bonaparte", "Jerome I", false, 1784, 1860, "8 Jul 1807", "26 Oct 1813", "King of Westphalia" },
{ "Marie Louise of Austria", null, false, 1791, 1847, null, null, "Empress Consort of the French" },
{ "Josephine of Beauharnais", null, false, 1763, 1814, null, null, "Empress Consort of the French" },
{ "Alexandre of Beauharnais", null, false, 1760, 1794, null, null, null },
{ "Betsy Patterson", null, false, 1785, 1879, null, null, null },
{ "Catharina of Wurttemberg", null, false, 1783, 1835, null, null, "Queen Consort of Westphalia" },
{ "Francois Bonaparte", "Napoleon II", false, 1811, 1832, "22 Jun 1815", "7 Jul 1815", "Emperor of the French" },
{ "Hortense of Beauharnais", null, false, 1783, 1837, null, null, "Queen Consort of Holland" },
{ "Jerome Napoleon", null, false, 1805, 1870, null, null, null },
{ "Prince Napoleon", null, false, 1822, 1891, null, null, null },
{ "Louis Napoleon", "Napoleon III", true, 1808, 1873, "2 Dec 1852", "4 Sep 1870", "Emperors of the French" },
{ "Napoleon-Louis Bonaparte", "Louis II", false, 1804, 1831, "1 Jul 1810", "13 Jul 1810", "King of Holland" },
{ "Napoleon IV Eugene", null, true, 1856, 1879, null, null, null },
{ "Napoleon V Victor", null, true, 1862, 1926, null, null, null },
{ "Marie Clotilde Bonaparte", null, false, 1912, 1996, null, null, null },
{ "Napoleon VI Louis", null, true, 1914, 1997, null, null, null },
{ "Napoleon VII Charles", null, true, 1950, null, null, null, null },
{ "Napoleon VIII Jean-Christophe", null, true, 1986, null, null, null, null },
{ "Sophie Catherine Bonaparte", null, false, 1992, null, null, null, null }
};
// Relation among the members of the House to be inserted in the database
final static Object houseRelationData[][] = {
// memberName, memberName, relType
{ "Carlo Bonaparte", "Letizia Ramolino", "spouse" },
{ "Carlo Bonaparte", "Joseph Bonaparte", "child" },
{ "Letizia Ramolino", "Joseph Bonaparte", "child" },
{ "Carlo Bonaparte", "Napoleon Bonaparte", "child" },
{ "Letizia Ramolino", "Napoleon Bonaparte", "child" },
{ "Carlo Bonaparte", "Lucien Bonaparte", "child" },
{ "Letizia Ramolino", "Lucien Bonaparte", "child" },
{ "Carlo Bonaparte", "Elisa Bonaparte", "child" },
{ "Letizia Ramolino", "Elisa Bonaparte", "child" },
{ "Carlo Bonaparte", "Louis Bonaparte", "child" },
{ "Letizia Ramolino", "Louis Bonaparte", "child" },
{ "Carlo Bonaparte", "Pauline Bonaparte", "child" },
{ "Letizia Ramolino", "Pauline Bonaparte", "child" },
{ "Carlo Bonaparte", "Caroline Bonaparte", "child" },
{ "Letizia Ramolino", "Caroline Bonaparte", "child" },
{ "Carlo Bonaparte", "Jerome Bonaparte", "child" },
{ "Letizia Ramolino", "Jerome Bonaparte", "child" },
{ "Napoleon Bonaparte", "Marie Louise of Austria", "spouse" },
{ "Napoleon Bonaparte", "Francois Bonaparte", "child" },
{ "Marie Louise of Austria", "Francois Bonaparte", "child" },
{ "Napoleon Bonaparte", "Josephine of Beauharnais", "spouse" },
{ "Alexandre of Beauharnais", "Josephine of Beauharnais", "spouse" },
{ "Alexandre of Beauharnais", "Hortense of Beauharnais", "child" },
{ "Josephine of Beauharnais", "Hortense of Beauharnais", "child" },
{ "Louis Bonaparte", "Hortense of Beauharnais", "spouse" },
{ "Louis Bonaparte", "Louis Napoleon", "child" },
{ "Hortense of Beauharnais", "Louis Napoleon", "child" },
{ "Louis Bonaparte", "Napoleon-Louis Bonaparte", "child" },
{ "Hortense of Beauharnais", "Napoleon-Louis Bonaparte", "child" },
{ "Jerome Bonaparte", "Betsy Patterson", "spouse" },
{ "Jerome Bonaparte", "Jerome Napoleon", "child" },
{ "Betsy Patterson", "Jerome Napoleon", "child" },
{ "Jerome Bonaparte", "Catharina of Wurttemberg", "spouse" },
{ "Jerome Bonaparte", "Prince Napoleon", "child" },
{ "Catharina of Wurttemberg", "Prince Napoleon", "child" },
{ "Louis Napoleon", "Napoleon IV Eugene", "child" },
{ "Prince Napoleon", "Napoleon V Victor", "child" },
{ "Napoleon V Victor", "Napoleon VI Louis", "child" },
{ "Napoleon VI Louis", "Napoleon VII Charles", "child" },
{ "Napoleon VII Charles", "Napoleon VIII Jean-Christophe", "child" },
{ "Napoleon VII Charles", "Sophie Catherine Bonaparte", "child" } };
public static void main(String[] args) throws Exception {
String url = "tcp://localhost:8228";
String user = "napoleon";
String pwd = "bonaparte";
TGConnection conn = null;
try {
conn = TGConnectionFactory.getInstance().createConnection(url, user, pwd, null);
conn.connect();
TGGraphObjectFactory gof = conn.getGraphObjectFactory();
if (gof == null) {
throw new Exception("Graph object not found");
}
TGGraphMetadata gmd = conn.getGraphMetadata(true);
TGNodeType houseMemberType = gmd.getNodeType("houseMemberType");
if (houseMemberType == null)
throw new Exception("Node type not found");
TGNode houseMember;
Hashtable<String, TGNode> houseMemberTable = new Hashtable<String, TGNode>();
//
// Insert node data into database
//
for (int i = 0; i < houseMemberData.length; i++) {
houseMember = gof.createNode(houseMemberType);
houseMember.setAttribute("memberName", houseMemberData[i][0]);
houseMember.setAttribute("crownName", houseMemberData[i][1]);
houseMember.setAttribute("houseHead", houseMemberData[i][2]);
houseMember.setAttribute("yearBorn", houseMemberData[i][3]);
houseMember.setAttribute("yearDied", houseMemberData[i][4]);
houseMember.setAttribute("crownTitle", houseMemberData[i][7]);
Calendar date = Calendar.getInstance();
if (houseMemberData[i][5] != null) {
date.setTime((new SimpleDateFormat("dd MMM yyyy").parse((String) houseMemberData[i][5])));
houseMember.setAttribute("reignStart", date);
}
else
houseMember.setAttribute("reignStart", null);
if (houseMemberData[i][6] != null) {
date.setTime((new SimpleDateFormat("dd MMM yyyy").parse((String) houseMemberData[i][6])));
houseMember.setAttribute("reignEnd", date);
}
else
houseMember.setAttribute("reignEnd", null);
conn.insertEntity(houseMember);
conn.commit(); // Write data to database
System.out.println(
"Transaction completed for Node : " + houseMember.getAttribute("memberName").getAsString());
houseMemberTable.put(houseMember.getAttribute("memberName").getAsString(), houseMember);
}
System.out.println("-------------------------------------------------");
//
// Insert edge data into database
//
TGNode houseMemberFrom;
TGNode houseMemberTo;
TGEdge houseRelation;
TGEdge.DirectionType houseRelationDirection;
for (int i = 0; i < houseRelationData.length; i++) {
houseMemberFrom = houseMemberTable.get(houseRelationData[i][0]);
houseMemberTo = houseMemberTable.get(houseRelationData[i][1]);
houseRelationDirection = houseRelationData[i][2].equals("spouse") ? TGEdge.DirectionType.UnDirected
: TGEdge.DirectionType.Directed;
houseRelation = gof.createEdge(houseMemberFrom, houseMemberTo, houseRelationDirection);
houseRelation.setAttribute("relType", houseRelationData[i][2]);
conn.insertEntity(houseRelation);
conn.commit();
System.out.println(
"Transaction completed for Edge : " + houseMemberFrom.getAttribute("memberName").getAsString()
+ " to " + houseMemberTo.getAttribute("memberName").getAsString());
}
System.out.println("\nHouse of Bonaparte graph completed successfully");
}
finally {
if (conn != null)
conn.disconnect();
}
}
}
我得到以下例外：
信息：握手成功。 2016年11月11日上午10:16:38 com.tibco.tgdb.log.SimpleJavaLogger日志信息：已成功连接 使用用户：拿破仑线程“主”中的异常 com.tibco.tgdb.exception.TGException：为a指定的空值 null属性at com.tibco.tgdb.model.impl.AbstractEntity.setAttribute（AbstractEntity.java:102） 在com.tibco.tgdb.example.BuildGraph1.main（BuildGraph1.java:151）
答案 0 :(得分：0)
在for loop方法的main内，您正在为setAttribute()调用null "crownName"的值houseMemberData
您的数组"crownName"包含var bits = new BitArray(_byte);