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1
22
23 package org.xquark.xquery.metadata;
24
25 import java.lang.reflect.InvocationTargetException  ;
26 import java.lang.reflect.Method ;
27 import java.util.ArrayList ;
28 import java.util.HashMap ;
29
30 import org.xquark.xquery.parser.LibraryFunctionCall;
31 import org.xquark.xquery.parser.XQueryException;
32
33 public class JavaInvoker implements InvokerInterface {
34
35 private DynamicContext dc = null;
36 private HashMap javaClassMap = new HashMap ();
37
38 public Object invoke(String funcName, Object [] params) {
39 return null;
40 }
41
42 public Object invoke(LibraryFunctionCall lfc, Object [] params) throws XQueryException {
43 try {
44 Object javaObj = (Object ) javaClassMap.get(lfc.getFuncName().getNameSpace().substring(5));
45 Method method = lfc.getFunctionDefinition().getMethod();
46 Class [] paramTypes = method.getParameterTypes();
47 Object [] javaObjs = new Object [params.length];
50 for (int i=0;i<params.length;i++) {
51 Object obj = getJavaObjectFromDataModelObject(params[i],paramTypes[i]);
52 javaObjs[i] = obj;
53 }
54 Object obj = method.invoke(javaObj, javaObjs);
55 return obj;
56 } catch (IllegalAccessException e) {
57 throw new XQueryException(e.getMessage());
58 } catch (InvocationTargetException e) {
59 throw new XQueryException(e.getMessage());
60 }
61 }
62
63 public void setDC(DynamicContext dc) {
64 this.dc = dc;
65 }
66
67 public void addClass(String name, Object obj) {
68 javaClassMap.put(name,obj);
69 }
70
71
95 private Object getJavaObjectFromDataModelObject(Object obj, Class cl) {
96 if (obj instanceof ArrayList )
97 return null;
98 if (cl == String .class) {
99 return obj.toString();
100 } else if (cl == int.class) {
101 return new Integer (((Number )obj).intValue());
102 }
103 return null;
104 }
105
106
107 }
108 |
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