Adding @UniqueConstraint annotation.

git-svn-id: https://svn.apache.org/repos/asf/incubator/openjpa/trunk@492225 13f79535-47bb-0310-9956-ffa450edef68

openjpa-jdbc/src/main/java/org/apache/openjpa/jdbc/meta/ClassMapping.java

@@ -36,6 +36,8 @@ import org.apache.openjpa.jdbc.schema.ColumnIO;
 import org.apache.openjpa.jdbc.schema.ForeignKey;
 import org.apache.openjpa.jdbc.schema.Schemas;
 import org.apache.openjpa.jdbc.schema.Table;
+import org.apache.openjpa.jdbc.schema.Unique;
+import org.apache.openjpa.jdbc.schema.XMLSchemaParser;
 import org.apache.openjpa.jdbc.sql.Joins;
 import org.apache.openjpa.jdbc.sql.Result;
 import org.apache.openjpa.jdbc.sql.RowManager;
@@ -793,6 +795,44 @@ public class ClassMapping
                     _cols[i].setFlag(Column.FLAG_DIRECT_UPDATE, true);
             }
         }
+        mapUniqueConstraints();
+    }
+    
+    /**
+     * Adds unique constraints to the mapped table.
+     *
+     */
+    void mapUniqueConstraints() {
+        Log log = getRepository().getLog();
+        Collection uniqueInfos = _info.getUniqueConstraints();
+        if (uniqueInfos == null || uniqueInfos.isEmpty())
+            return;
+        Iterator iter = uniqueInfos.iterator();
+        Table table = getTable();
+        int i = 1;
+        while (iter.hasNext()) {
+            XMLSchemaParser.UniqueInfo uniqueInfo = 
+                (XMLSchemaParser.UniqueInfo)iter.next();
+            if (uniqueInfo.cols == null || uniqueInfo.cols.isEmpty())
+                continue;
+            String constraintName = table.getName() + "_UNIQUE_" + i;
+            i++;
+            Unique uniqueConstraint = table.addUnique(constraintName);
+            Iterator uniqueColumnNames = uniqueInfo.cols.iterator();
+            while (uniqueColumnNames.hasNext()) {
+                String uniqueColumnName = (String)uniqueColumnNames.next();
+                Column uniqueColumn = table.getColumn(uniqueColumnName);
+                if (uniqueColumn != null) {
+                    uniqueConstraint.addColumn(uniqueColumn);
+                } else {
+                    table.removeUnique(uniqueConstraint);
+                    if (log.isWarnEnabled())
+                        log.warn(_loc.get("missing-unique-column", this, 
+                            table.getName(), uniqueColumnName));
+                    break;
+                }
+            }
+        }
     }
 
     /**

openjpa-jdbc/src/main/java/org/apache/openjpa/jdbc/meta/ClassMappingInfo.java

@@ -21,6 +21,9 @@ import java.util.HashMap;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
+import java.util.Collection;
+import java.util.ArrayList;
+import java.util.Arrays;
 
 import org.apache.openjpa.jdbc.meta.strats.FullClassStrategy;
 import org.apache.openjpa.jdbc.schema.Column;
@@ -28,6 +31,7 @@ import org.apache.openjpa.jdbc.schema.ForeignKey;
 import org.apache.openjpa.jdbc.schema.Schema;
 import org.apache.openjpa.jdbc.schema.SchemaGroup;
 import org.apache.openjpa.jdbc.schema.Table;
+import org.apache.openjpa.jdbc.schema.XMLSchemaParser;
 import org.apache.openjpa.lib.meta.SourceTracker;
 import org.apache.openjpa.lib.xml.Commentable;
 
@@ -51,6 +55,7 @@ public class ClassMappingInfo
     private File _file = null;
     private int _srcType = SRC_OTHER;
     private String[] _comments = null;
+    private Collection _uniqueConstraints = null;//XMLSchemaParser.UniqueInfo
 
     /**
      * The described class name.
@@ -275,7 +280,7 @@ public class ClassMappingInfo
             : cls.getStrategy().getAlias();
         if (strat != null && (cls.getPCSuperclass() != null
             || !FullClassStrategy.ALIAS.equals(strat)))
-            setStrategy(strat);
+            setStrategy(strat);        
     }
 
     public boolean hasSchemaComponents() {
@@ -308,8 +313,22 @@ public class ClassMappingInfo
                     _seconds.put(key, cinfo._seconds.get(key));
             }
         }
+        if (cinfo._uniqueConstraints != null)
+           _uniqueConstraints = new ArrayList(cinfo._uniqueConstraints);
     }
 
+    public void addUniqueConstaint(String[] columnNames) {
+        if (_uniqueConstraints == null)
+            _uniqueConstraints = new ArrayList();
+        XMLSchemaParser.UniqueInfo uniqueInfo = new XMLSchemaParser.UniqueInfo();
+        uniqueInfo.cols = Arrays.asList(columnNames);
+        _uniqueConstraints.add(uniqueInfo);
+    }
+    
+    public Collection getUniqueConstraints() {
+        return _uniqueConstraints;
+    }
+    
     public File getSourceFile() {
         return _file;
     }

openjpa-jdbc/src/main/java/org/apache/openjpa/jdbc/schema/SchemaTool.java

@@ -560,6 +560,27 @@ public class SchemaTool {
             }
         }
 
+        // Unique Constraints on group of columns
+        Unique[] uniques;
+        for (int i = 0; i < schemas.length; i++) {
+            tabs = schemas[i].getTables();
+            for (int j = 0; j < tabs.length; j++) {
+                // create unique constraints only on new tables 
+                if (!newTables.contains(tabs[j]))
+                    continue;
+
+                uniques = tabs[j].getUniques();
+                if (uniques == null || uniques.length == 0)
+                    continue;
+                dbTable = db.findTable(tabs[j]);
+                if (dbTable == null)
+                    continue;
+                for (int k = 0; k < uniques.length; k++) {
+                    dbTable.importUnique(uniques[k]);
+                }
+            }
+        }
+        
         // foreign keys
         ForeignKey[] fks;
         ForeignKey fk;

openjpa-jdbc/src/main/java/org/apache/openjpa/jdbc/schema/XMLSchemaParser.java

@@ -579,7 +579,7 @@ public class XMLSchemaParser
     /**
      * Used to hold unique constraint info before it is resolved.
      */
-    private static class UniqueInfo {
+    public static class UniqueInfo {
 
         public Unique unq = null;
         public Collection cols = new LinkedList();

openjpa-jdbc/src/main/resources/org/apache/openjpa/jdbc/meta/localizer.properties

@@ -401,3 +401,6 @@ untraversable-path: Result path "{2}" in result type "{1}" of mapping "{0}" \
 	attempts to traverse through a non-relation field.
 num-cols-path: Result path "{2}" in result type "{1}" of mapping "{0}" \
 	attempts to map a field that does not have exactly 1 column.
+missing-unique-column: A unique constraint includes a column "{2}" specified \
+	in mapping of class "{0}" to table "{1}". However, the column does not \
+	exist in "{1}" table. This constraint will not be defined in the schema.

openjpa-persistence-jdbc/src/main/java/org/apache/openjpa/persistence/jdbc/AnnotationPersistenceMappingParser.java

@@ -47,6 +47,7 @@ import javax.persistence.SqlResultSetMappings;
 import javax.persistence.Table;
 import javax.persistence.TableGenerator;
 import javax.persistence.Temporal;
+import javax.persistence.UniqueConstraint;
 
 import org.apache.commons.lang.StringUtils;
 import org.apache.openjpa.jdbc.conf.JDBCConfiguration;
@@ -459,10 +460,9 @@ public class AnnotationPersistenceMappingParser
         if (tableName != null)
             cm.getMappingInfo().setTableName(tableName);
 
-        //### EJB3
+        for (UniqueConstraint unique:table.uniqueConstraints()) {
-        Log log = getLog();
+            ((ClassMappingInfo)cm.getMappingInfo()).addUniqueConstaint(unique.columnNames());
-        if (table.uniqueConstraints().length > 0 && log.isWarnEnabled())
+        }
-            log.warn(_loc.get("unique-constraints", cm));
     }
 
     /**