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Java > Open Source Codes > org > objectstyle > cayenne > dba > oracle > OracleProcedureAction


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56 package org.objectstyle.cayenne.dba.oracle;
57
58 import java.sql.CallableStatement JavaDoc;
59 import java.sql.ResultSet JavaDoc;
60 import java.sql.SQLException JavaDoc;
61 import java.util.Collections JavaDoc;
62 import java.util.HashMap JavaDoc;
63 import java.util.List JavaDoc;
64 import java.util.Map JavaDoc;
65
66 import org.objectstyle.cayenne.access.OperationObserver;
67 import org.objectstyle.cayenne.access.QueryLogger;
68 import org.objectstyle.cayenne.access.jdbc.ColumnDescriptor;
69 import org.objectstyle.cayenne.access.jdbc.ProcedureAction;
70 import org.objectstyle.cayenne.access.jdbc.RowDescriptor;
71 import org.objectstyle.cayenne.access.types.ExtendedType;
72 import org.objectstyle.cayenne.dba.DbAdapter;
73 import org.objectstyle.cayenne.map.EntityResolver;
74 import org.objectstyle.cayenne.map.ProcedureParameter;
75 import org.objectstyle.cayenne.query.ProcedureQuery;
76
77 /**
78  * Oracle-specific ProcedureAction that supports ResultSet OUT parameters.
79  *
80  * @since 1.2
81  * @author Andrei Adamchik
82  */
83 class OracleProcedureAction extends ProcedureAction {
84
85     OracleProcedureAction(ProcedureQuery query, DbAdapter adapter,
86             EntityResolver entityResolver) {
87         super(query, adapter, entityResolver);
88     }
89
90     /**
91      * Helper method that reads OUT parameters of a CallableStatement.
92      */
93     protected void readProcedureOutParameters(
94             CallableStatement JavaDoc statement,
95             OperationObserver delegate) throws SQLException JavaDoc, Exception JavaDoc {
96
97         long t1 = System.currentTimeMillis();
98
99         // build result row...
100 Map JavaDoc result = null;
101         List JavaDoc parameters = getProcedure().getCallParameters();
102         for (int i = 0; i < parameters.size(); i++) {
103             ProcedureParameter parameter = (ProcedureParameter) parameters.get(i);
104
105             if (!parameter.isOutParam()) {
106                 continue;
107             }
108
109             // ==== start Oracle-specific part
110 if (parameter.getType() == OracleAdapter.getOracleCursorType()) {
111                 ResultSet JavaDoc rs = (ResultSet JavaDoc) statement.getObject(i + 1);
112
113                 try {
114                     RowDescriptor rsDescriptor = describeResultSet(rs, processedResultSets++);
115                     readResultSet(rs, rsDescriptor, query, delegate);
116                 }
117                 finally {
118                     try {
119                         rs.close();
120                     }
121                     catch (SQLException JavaDoc ex) {
122                     }
123                 }
124             }
125             // ==== end Oracle-specific part
126 else {
127                 if (result == null) {
128                     result = new HashMap JavaDoc();
129                 }
130
131                 ColumnDescriptor descriptor = new ColumnDescriptor(parameter);
132                 ExtendedType type = getAdapter()
133                         .getExtendedTypes()
134                         .getRegisteredType(descriptor.getJavaClass());
135                 Object JavaDoc val = type.materializeObject(statement, i + 1, descriptor
136                         .getJdbcType());
137
138                 result.put(descriptor.getLabel(), val);
139             }
140         }
141
142         if (result != null && !result.isEmpty()) {
143             // treat out parameters as a separate data row set
144 QueryLogger.logSelectCount(query.getLoggingLevel(), 1, System
145                     .currentTimeMillis()
146                     - t1);
147             delegate.nextDataRows(query, Collections.singletonList(result));
148         }
149     }
150 }
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