- package com.quantum.model;
+package com.quantum.model;
import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.util.List;
import java.util.Map;
+import com.quantum.adapters.AdapterFactory;
import com.quantum.adapters.DatabaseAdapter;
+import com.quantum.sql.MultiSQLServer;
+import com.quantum.sql.SQLMetaDataResults;
+import com.quantum.util.sql.SQLStates;
/**
* This class models a table or view.
* @author bcholmes
*/
abstract class EntityImpl implements Entity {
- private String schema;
+
+ // The JDBC-ODBC Driver is more happy if you look up metadata values
+ // using the column number than if you use the column name
+
+ private static final int INDEX_METADATA_INDEX_NAME = 6;
+ private static final int INDEX_METADATA_COLUMN_NAME = 9;
+ private static final int INDEX_METADATA_ASC_OR_DESC = 10;
+
+ private static final int PRIMARY_KEYS_METADATA_COLUMN_NAME = 4;
+ private static final int PRIMARY_KEYS_METADATA_KEY_SEQ = 5;
+
+ private static final int COLUMN_METADATA_COLUMN_NAME = 4;
+ private static final int COLUMN_METATDATA_DATA_TYPE = 5;
+ private static final int COLUMN_METATDATA_TYPE_NAME = 6;
+ private static final int COLUMN_METADATA_COLUMN_SIZE = 7;
+ private static final int COLUMN_METADATA_DECIMAL_DIGITS = 9;
+ private static final int COLUMN_METADATA_REMARKS = 12;
+ private static final int COLUMN_METADATA_ORDINAL_POSITION = 17;
+ private static final int COLUMN_METADATA_IS_NULLABLE = 18;
+
+ private String schema;
private String name;
private String type;
private Bookmark bookmark;
private Boolean exists = Boolean.TRUE;
+ private boolean isSynonym = false; // Tells if its a synonym or not
+ // Columns will be cached in this array, as sometimes asking for them to the JDBC driver is very costy
+ // (for example in Oracle when synonyms and remarks are asked for )
+ private Column[] columns = null;
- public EntityImpl(Bookmark bookmark, String schema, String name, String type) {
+ public EntityImpl(Bookmark bookmark, String schema, String name, String type, boolean isSynonym) {
this.schema = schema;
this.name = name;
this.type = type;
this.bookmark = bookmark;
+ this.isSynonym = isSynonym;
}
public Bookmark getBookmark() {
return this.bookmark;
}
public Column getColumn(String columnName) throws NotConnectedException, SQLException {
Column column = null;
- Column[] columns = getColumns();
- for (int i = 0, length = (columns == null) ? 0 : columns.length;
+ if (this.columns == null) this.columns = getColumns();
+ for (int i = 0, length = (this.columns == null) ? 0 : this.columns.length;
column == null && i < length;
i++) {
- if (columnName != null && columnName.equals(columns[i].getName())) {
- column = columns[i];
+ if (columnName != null && columnName.equals(this.columns[i].getName())) {
+ column = this.columns[i];
}
}
return column;
}
public Column[] getColumns() throws NotConnectedException, SQLException {
-
- Map temp = new HashMap();
+ if (this.columns != null) return this.columns;
Connection connection = this.bookmark.getConnection();
- DatabaseMetaData metaData = connection.getMetaData();
- ResultSet resultSet = metaData.getColumns(null, getSchema(), getName(), null);
- try {
- while (resultSet.next()) {
- ColumnImpl column = new ColumnImpl(
- this,
- resultSet.getString("COLUMN_NAME"),
- resultSet.getString("TYPE_NAME"),
- resultSet.getInt("DATA_TYPE"),
- resultSet.getInt("COLUMN_SIZE"),
- resultSet.getInt("DECIMAL_DIGITS"),
- "YES".equalsIgnoreCase(resultSet.getString("IS_NULLABLE")),
- resultSet.getInt("ORDINAL_POSITION"),
- getComments(resultSet.getString("REMARKS"),getQualifiedName(), resultSet.getString("COLUMN_NAME"))
- );
- temp.put(column.getName(), column);
- }
- } finally {
- resultSet.close();
- }
-
- resultSet = metaData.getPrimaryKeys(null, getSchema(), getName());
try {
- while (resultSet.next()) {
- String name = resultSet.getString("COLUMN_NAME");
- short keySequence = resultSet.getShort("KEY_SEQ");
- ColumnImpl column = (ColumnImpl) temp.get(name);
- if (column != null) {
- column.setPrimaryKeyOrder(keySequence);
- }
- }
- resultSet.close();
-
- List columnList = Collections.synchronizedList(
- new ArrayList(temp.values()));
- Collections.sort(columnList);
- return (Column[]) columnList.toArray(new Column[columnList.size()]);
- } finally {
- resultSet.close();
+ this.columns = getColumnsFromMetaData(connection);
+ return this.columns;
+ } catch (SQLException e) {
+ if (SQLStates.ODBC_DRIVER_NOT_CAPABLE.equals(e.getSQLState())
+ && AdapterFactory.JDBC_ODBC_BRIDGE.equals(
+ getBookmark().getJDBCDriver().getType())) {
+ this.columns = getColumnsFromQuery(connection);
+ return this.columns;
+ } else {
+ throw e;
+ }
}
+
}
/**
+ * @param connection
+ * @return
+ * @throws SQLException
+ */
+ private Column[] getColumnsFromMetaData(Connection connection) throws SQLException {
+ Map temp = new HashMap();
+ DatabaseMetaData metaData = connection.getMetaData();
+ ResultSet resultSet = metaData.getColumns(null, getSchema(), getName(), null);
+ try {
+ while (resultSet.next()) {
+ ColumnImpl column = new ColumnImpl(
+ this,
+ resultSet.getString(COLUMN_METADATA_COLUMN_NAME),
+ resultSet.getString(COLUMN_METATDATA_TYPE_NAME),
+ resultSet.getInt(COLUMN_METATDATA_DATA_TYPE),
+ resultSet.getInt(COLUMN_METADATA_COLUMN_SIZE),
+ resultSet.getInt(COLUMN_METADATA_DECIMAL_DIGITS),
+ "YES".equalsIgnoreCase(resultSet.getString(COLUMN_METADATA_IS_NULLABLE)),
+ resultSet.getInt(COLUMN_METADATA_ORDINAL_POSITION),
+ resultSet.getString(COLUMN_METADATA_REMARKS)
+ );
+ temp.put(column.getName(), column);
+ }
+ } finally {
+ resultSet.close();
+ }
+
+ resultSet = metaData.getPrimaryKeys(null, getSchema(), getName());
+ try {
+ while (resultSet.next()) {
+ String name = resultSet.getString(PRIMARY_KEYS_METADATA_COLUMN_NAME);
+ short keySequence = resultSet.getShort(PRIMARY_KEYS_METADATA_KEY_SEQ);
+ ColumnImpl column = (ColumnImpl) temp.get(name);
+ if (column != null) {
+ column.setPrimaryKeyOrder(keySequence);
+ }
+
+ }
+
+ List columnList = Collections.synchronizedList(
+ new ArrayList(temp.values()));
+ Collections.sort(columnList);
+ return (Column[]) columnList.toArray(new Column[columnList.size()]);
+
+ } finally {
+ resultSet.close();
+ }
+ }
+
+ /**
+ * Some databases, (in particular, MS Access under ODBC) aren't terribly friendly
+ * about supporting metadata. This method scrapes out the data the old-fashioned way.
+ *
+ * @param temp
+ * @param connection
+ * @throws SQLException
+ */
+ private Column[] getColumnsFromQuery(Connection connection) throws SQLException {
+ List temp = new ArrayList();
+ SQLMetaDataResults results =
+ (SQLMetaDataResults) MultiSQLServer.getInstance().getMetaData(
+ this, connection);
+ SQLMetaDataResults.Row[] rows = results.getRows();
+ for (int i = 0, length = results.getRowCount(); i < length; i++) {
+ ColumnImpl column = new ColumnImpl(
+ this,
+ (String) rows[i].get(1),
+ (String) rows[i].get(2),
+ ((Integer) rows[i].get(7)).intValue(),
+ ((Long) rows[i].get(3)).longValue(),
+ ((Integer) rows[i].get(4)).intValue(),
+ "Nullable".equalsIgnoreCase((String) rows[i].get(5)),
+ i+1, "");
+ temp.add(column);
+ }
+ return (Column[]) temp.toArray(new Column[temp.size()]);
+ }
+ /**
* Some JDBC drivers (Oracle for example) won't return the comments
* We recheck with a custom query, if it's defined
* @param iniComment The already got comment
* @param tableName The fully qualified table name
* @param columnName The column name
+ *
+ * NO LONGER USED, there is a parameter (remarksReporting) in the JDBC connection that makes ORACLE return the
+ * remarks for tables and columns. Is slower, so an option will be used.
+ *
+ * The function is kept in case other JDBC drivers have the same problem
*/
private String getComments( String iniComment, String tableName, String columnName) {
if (iniComment != null && iniComment.length() > 0)
String comment = "";
try {
Connection con = this.bookmark.getConnection();
- Statement stmt = con.createStatement();
DatabaseAdapter adapter = this.bookmark.getAdapter();
- if (adapter != null && stmt != null && adapter.getCommentsQuery(tableName, columnName) != null) {
-
- stmt.execute(adapter.getCommentsQuery(tableName, columnName));
- ResultSet set = stmt.getResultSet();
- if (set.next())
- comment = set.getString(1);
+ Statement stmt = con.createStatement();
+ try {
+ if (adapter != null && stmt != null
+ && adapter.getCommentsQuery(tableName, columnName) != null) {
+
+ stmt.execute(adapter.getCommentsQuery(tableName, columnName));
+ ResultSet set = stmt.getResultSet();
+ try {
+ if (set.next()) {
+ comment = set.getString(1);
+ }
+ } finally {
+ set.close();
+ }
+ }
+ } finally {
+ stmt.close();
}
} catch (NotConnectedException e) {
} catch (SQLException e) {
return comment;
}
+
public Index[] getIndexes() {
List indexList = new ArrayList();
ResultSet resultSet = metaData.getIndexInfo(null, getSchema(), getName(), false, false);
while (resultSet.next()) {
- String indexName = resultSet.getString("INDEX_NAME");
+ String indexName = resultSet.getString(INDEX_METADATA_INDEX_NAME);
IndexImpl index = (IndexImpl) temp.get(indexName);
if (index == null) {
index = new IndexImpl(this, indexName);
temp.put(indexName, index);
}
- String columnName = resultSet.getString("COLUMN_NAME");
- String ascending = resultSet.getString("ASC_OR_DESC");
+ String columnName = resultSet.getString(INDEX_METADATA_COLUMN_NAME);
+ String ascending = resultSet.getString(INDEX_METADATA_ASC_OR_DESC);
index.addColumn(columnName, ascending == null
? null : (ascending.toUpperCase().startsWith("A")
? Boolean.TRUE : Boolean.FALSE));
return this.getQualifiedName().compareTo(that.getQualifiedName());
}
}
+
+ /**
+ * @return Returns the isSynonym.
+ */
+ public boolean isSynonym() {
+ return isSynonym;
+ }
+
}
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