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1
56 package org.objectstyle.cayenne.access.types;
57
58 import java.lang.reflect.Method  ;
59 import java.sql.CallableStatement ;
60 import java.sql.ResultSet ;
61 import java.util.HashMap ;
62 import java.util.Iterator ;
63 import java.util.Map ;
64
65 import org.objectstyle.cayenne.CayenneRuntimeException;
66 import org.objectstyle.cayenne.dba.TypesMapping;
67
68
74 public class DefaultType extends AbstractType {
75
76 private static final Map readMethods = new HashMap ();
77 private static final Map procReadMethods = new HashMap ();
78 private static Method readObjectMethod;
79 private static Method procReadObjectMethod;
80
81 static {
82 try {
83 Class rsClass = ResultSet .class;
84 Class [] paramTypes = new Class [] {
85 Integer.TYPE
86 };
87 readMethods.put(TypesMapping.JAVA_LONG, rsClass.getMethod("getLong",
88 paramTypes));
89 readMethods.put(TypesMapping.JAVA_BIGDECIMAL, rsClass
90 .getMethod("getBigDecimal", paramTypes));
91 readMethods.put(TypesMapping.JAVA_BOOLEAN, rsClass.getMethod("getBoolean",
92 paramTypes));
93 readMethods.put(TypesMapping.JAVA_BYTE, rsClass.getMethod("getByte",
94 paramTypes));
95 readMethods.put(TypesMapping.JAVA_BYTES, rsClass.getMethod("getBytes",
96 paramTypes));
97 readMethods.put(TypesMapping.JAVA_SQLDATE, rsClass.getMethod("getDate",
98 paramTypes));
99 readMethods.put(TypesMapping.JAVA_DOUBLE, rsClass.getMethod("getDouble",
100 paramTypes));
101 readMethods.put(TypesMapping.JAVA_FLOAT, rsClass.getMethod("getFloat",
102 paramTypes));
103 readMethods.put(TypesMapping.JAVA_INTEGER, rsClass.getMethod("getInt",
104 paramTypes));
105 readMethods.put(TypesMapping.JAVA_SHORT, rsClass.getMethod("getShort",
106 paramTypes));
107 readMethods.put(TypesMapping.JAVA_STRING, rsClass.getMethod("getString",
108 paramTypes));
109 readMethods.put(TypesMapping.JAVA_TIME, rsClass.getMethod("getTime",
110 paramTypes));
111 readMethods.put(TypesMapping.JAVA_TIMESTAMP, rsClass
112 .getMethod("getTimestamp", paramTypes));
113
114 readObjectMethod = rsClass.getMethod("getObject", paramTypes);
115
116 Class csClass = CallableStatement .class;
118 procReadMethods.put(TypesMapping.JAVA_LONG, csClass.getMethod("getLong",
119 paramTypes));
120 procReadMethods.put(TypesMapping.JAVA_BIGDECIMAL, csClass
121 .getMethod("getBigDecimal", paramTypes));
122 procReadMethods.put(TypesMapping.JAVA_BOOLEAN, csClass
123 .getMethod("getBoolean", paramTypes));
124 procReadMethods.put(TypesMapping.JAVA_BYTE, csClass.getMethod("getByte",
125 paramTypes));
126 procReadMethods.put(TypesMapping.JAVA_BYTES, csClass.getMethod("getBytes",
127 paramTypes));
128 procReadMethods.put(TypesMapping.JAVA_SQLDATE, csClass.getMethod("getDate",
129 paramTypes));
130 procReadMethods.put(TypesMapping.JAVA_DOUBLE, csClass.getMethod("getDouble",
131 paramTypes));
132 procReadMethods.put(TypesMapping.JAVA_FLOAT, csClass.getMethod("getFloat",
133 paramTypes));
134 procReadMethods.put(TypesMapping.JAVA_INTEGER, csClass.getMethod("getInt",
135 paramTypes));
136 procReadMethods.put(TypesMapping.JAVA_SHORT, csClass.getMethod("getShort",
137 paramTypes));
138 procReadMethods.put(TypesMapping.JAVA_STRING, csClass.getMethod("getString",
139 paramTypes));
140 procReadMethods.put(TypesMapping.JAVA_TIME, csClass.getMethod("getTime",
141 paramTypes));
142 procReadMethods.put(TypesMapping.JAVA_TIMESTAMP, csClass
143 .getMethod("getTimestamp", paramTypes));
144
145 procReadObjectMethod = csClass.getMethod("getObject", paramTypes);
146 }
147 catch (Exception ex) {
148 throw new CayenneRuntimeException("Error initializing read methods.", ex);
149 }
150 }
151
152
153 public static Iterator defaultTypes() {
154 return readMethods.keySet().iterator();
155 }
156
157 protected String className;
158 protected Method readMethod;
159 protected Method procReadMethod;
160
161
164 public DefaultType() {
165 this.className = Object .class.getName();
166 this.readMethod = readObjectMethod;
167 this.procReadMethod = procReadObjectMethod;
168 }
169
170 public DefaultType(String className) {
171 this.className = className;
172 this.readMethod = (Method ) readMethods.get(className);
173
174 if (readMethod == null) {
175 throw new CayenneRuntimeException("Unsupported default class: "
176 + className
177 + ". If you want a non-standard class to map to JDBC type,"
178 + " you will need to implement ExtendedType interface yourself.");
179 }
180
181 this.procReadMethod = (Method ) procReadMethods.get(className);
182 if (procReadMethod == null) {
183 throw new CayenneRuntimeException("Unsupported default class: "
184 + className
185 + ". If you want a non-standard class to map to JDBC type,"
186 + " you will need to implement ExtendedType interface yourself.");
187 }
188 }
189
190 public String getClassName() {
191 return className;
192 }
193
194 public Object materializeObject(ResultSet rs, int index, int type) throws Exception {
195 Object val = readMethod.invoke(rs, new Object [] {
196 new Integer (index)
197 });
198 return (rs.wasNull()) ? null : val;
199 }
200
201 public Object materializeObject(CallableStatement st, int index, int type)
202 throws Exception {
203 Object val = procReadMethod.invoke(st, new Object [] {
204 new Integer (index)
205 });
206 return (st.wasNull()) ? null : val;
207 }
208 }
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