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1
64
65 package com.jcorporate.expresso.core.dbobj;
66
67 import org.apache.log4j.Logger;
68
69 import java.util.HashMap  ;
70
71
72
78 public final class SchemaFactory {
79 HashMap createdSchemas;
80 static Logger log = Logger.getLogger(SchemaFactory.class);
81 static SchemaFactory theInstance = new SchemaFactory();
82 private String mDataContext;
83 private int mUserID;
84
85 protected SchemaFactory() {
86 createdSchemas = new HashMap (5);
87 }
88
89 public static SchemaFactory getInstance() {
90 return theInstance;
91 }
92
93
94 public synchronized Schema getSchema(String className) {
95 Schema returnValue = (Schema) createdSchemas.get(className);
96
97 if (returnValue == null) {
98 returnValue = constructSchema(className);
99 if (returnValue != null) {
100 createdSchemas.put(className, returnValue);
101 }
102 }
103
104 return returnValue;
105 }
106
107 private Schema constructSchema(String className) {
108 try {
109 Schema result = Schema.instantiate(className);
110 result.setDataContext(getDataContext());
111 result.setRequestingUser(getRequestingUser());
112 return result;
113
114 } catch (java.lang.Throwable t) {
115 t.printStackTrace();
116 log.error("Error instantiating schema: ", t);
117 return null;
118 }
119 }
120
121 private int getRequestingUser() {
122 return mUserID;
123 }
124
125 public String getDataContext() {
126 return mDataContext;
127 }
128
129 public void setDataContext(String dataContext) {
130 mDataContext = dataContext;
131 }
132
133 public void setRequestingUser(int uid) {
134 mUserID = uid;
135 }
136 } |
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