/*******************************************************************************
* Copyright (c) 1998, 2015 Oracle and/or its affiliates. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
* which accompanies this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* Contributors:
* Oracle - initial API and implementation from Oracle TopLink
******************************************************************************/
package org.eclipse.persistence.testing.tests.performance.emulateddb;
import java.sql.*;
import org.eclipse.persistence.internal.helper.DatabaseField;
import org.eclipse.persistence.sessions.DatabaseRecord;
/**
* Emulated database result set meta data.
* This extracts columns from a list of DatabaseRows.
*/
public class EmulatedResultSetMetaData implements ResultSetMetaData {
protected EmulatedResultSet resultSet;
public EmulatedResultSetMetaData(EmulatedResultSet resultSet) {
this.resultSet = resultSet;
}
/**
* Returns the number of columns in this <code>ResultSet</code> object.
*
* @return the number of columns
* @exception SQLException if a database access error occurs
*/
public int getColumnCount() {
if (resultSet.getRows().isEmpty()) {
return 1;
}
return ((DatabaseRecord)resultSet.getRows().get(0)).getFields().size();
}
/**
* Indicates whether the designated column is automatically numbered, thus read-only.
*
* @param column the first column is 1, the second is 2, ...
* @return <code>true</code> if so; <code>false</code> otherwise
* @exception SQLException if a database access error occurs
*/
public boolean isAutoIncrement(int column) {
return false;
}
/**
* Indicates whether a column's case matters.
*
* @param column the first column is 1, the second is 2, ...
* @return <code>true</code> if so; <code>false</code> otherwise
* @exception SQLException if a database access error occurs
*/
public boolean isCaseSensitive(int column) {
return true;
}
/**
* Indicates whether the designated column can be used in a where clause.
*
* @param column the first column is 1, the second is 2, ...
* @return <code>true</code> if so; <code>false</code> otherwise
* @exception SQLException if a database access error occurs
*/
public boolean isSearchable(int column) {
return true;
}
/**
* Indicates whether the designated column is a cash value.
*
* @param column the first column is 1, the second is 2, ...
* @return <code>true</code> if so; <code>false</code> otherwise
* @exception SQLException if a database access error occurs
*/
public boolean isCurrency(int column) {
return false;
}
/**
* Indicates the nullability of values in the designated column.
*
* @param column the first column is 1, the second is 2, ...
* @return the nullability status of the given column; one of <code>columnNoNulls</code>,
* <code>columnNullable</code> or <code>columnNullableUnknown</code>
* @exception SQLException if a database access error occurs
*/
public int isNullable(int column) {
return 0;
}
/**
* Indicates whether values in the designated column are signed numbers.
*
* @param column the first column is 1, the second is 2, ...
* @return <code>true</code> if so; <code>false</code> otherwise
* @exception SQLException if a database access error occurs
*/
public boolean isSigned(int column) {
return true;
}
/**
* Indicates the designated column's normal maximum width in characters.
*
* @param column the first column is 1, the second is 2, ...
* @return the normal maximum number of characters allowed as the width
* of the designated column
* @exception SQLException if a database access error occurs
*/
public int getColumnDisplaySize(int column) {
return 0;
}
/**
* Gets the designated column's suggested title for use in printouts and
* displays.
*
* @param column the first column is 1, the second is 2, ...
* @return the suggested column title
* @exception SQLException if a database access error occurs
*/
public String getColumnLabel(int column) {
return "";
}
/**
* Get the designated column's name.
*
* @param column the first column is 1, the second is 2, ...
* @return column name
* @exception SQLException if a database access error occurs
*/
public String getColumnName(int column) {
return ((DatabaseField)((DatabaseRecord)resultSet.getRows().get(0)).getFields().get(column - 1)).getName();
}
/**
* Get the designated column's table's schema.
*
* @param column the first column is 1, the second is 2, ...
* @return schema name or "" if not applicable
* @exception SQLException if a database access error occurs
*/
public String getSchemaName(int column) {
return "";
}
/**
* Get the designated column's number of decimal digits.
*
* @param column the first column is 1, the second is 2, ...
* @return precision
* @exception SQLException if a database access error occurs
*/
public int getPrecision(int column) {
return 0;
}
/**
* Gets the designated column's number of digits to right of the decimal point.
*
* @param column the first column is 1, the second is 2, ...
* @return scale
* @exception SQLException if a database access error occurs
*/
public int getScale(int column) {
return 0;
}
/**
* Gets the designated column's table name.
*
* @param column the first column is 1, the second is 2, ...
* @return table name or "" if not applicable
* @exception SQLException if a database access error occurs
*/
public String getTableName(int column) {
return "";
}
/**
* Gets the designated column's table's catalog name.
*
* @param column the first column is 1, the second is 2, ...
* @return the name of the catalog for the table in which the given column
* appears or "" if not applicable
* @exception SQLException if a database access error occurs
*/
public String getCatalogName(int column) {
return "";
}
/**
* Retrieves the designated column's SQL type.
*
* @param column the first column is 1, the second is 2, ...
* @return SQL type from java.sql.Types
* @exception SQLException if a database access error occurs
* @see Types
*/
public int getColumnType(int column) {
return 0;
}
/**
* Retrieves the designated column's database-specific type name.
*
* @param column the first column is 1, the second is 2, ...
* @return type name used by the database. If the column type is
* a user-defined type, then a fully-qualified type name is returned.
* @exception SQLException if a database access error occurs
*/
public String getColumnTypeName(int column) {
return "";
}
/**
* Indicates whether the designated column is definitely not writable.
*
* @param column the first column is 1, the second is 2, ...
* @return <code>true</code> if so; <code>false</code> otherwise
* @exception SQLException if a database access error occurs
*/
public boolean isReadOnly(int column) {
return false;
}
/**
* Indicates whether it is possible for a write on the designated column to succeed.
*
* @param column the first column is 1, the second is 2, ...
* @return <code>true</code> if so; <code>false</code> otherwise
* @exception SQLException if a database access error occurs
*/
public boolean isWritable(int column) {
return true;
}
/**
* Indicates whether a write on the designated column will definitely succeed.
*
* @param column the first column is 1, the second is 2, ...
* @return <code>true</code> if so; <code>false</code> otherwise
* @exception SQLException if a database access error occurs
*/
public boolean isDefinitelyWritable(int column) {
return true;
}
//--------------------------JDBC 2.0-----------------------------------
/**
* <p>Returns the fully-qualified name of the Java class whose instances
* are manufactured if the method <code>ResultSet.getObject</code>
* is called to retrieve a value
* from the column. <code>ResultSet.getObject</code> may return a subclass of the
* class returned by this method.
*
* @param column the first column is 1, the second is 2, ...
* @return the fully-qualified name of the class in the Java programming
* language that would be used by the method
* <code>ResultSet.getObject</code> to retrieve the value in the specified
* column. This is the class name used for custom mapping.
* @exception SQLException if a database access error occurs
* @since 1.2
*/
public String getColumnClassName(int column) {
return "";
}
public boolean isWrapperFor(Class<?> iFace) throws SQLException{
return false;
}
public <T>T unwrap(Class<T> iFace) throws SQLException {
return iFace.cast(this);
}
}