com.mysql.jdbc.JDBC4DatabaseMetaData Maven / Gradle / Ivy
/*
Copyright (c) 2002, 2014, Oracle and/or its affiliates. All rights reserved.
The MySQL Connector/J is licensed under the terms of the GPLv2
, like most MySQL Connectors.
There are special exceptions to the terms and conditions of the GPLv2 as it is applied to
this software, see the FLOSS License Exception
.
This program is free software; you can redistribute it and/or modify it under the terms
of the GNU General Public License as published by the Free Software Foundation; version 2
of the License.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this
program; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth
Floor, Boston, MA 02110-1301 USA
*/
package com.mysql.jdbc;
import java.sql.ResultSet;
import java.sql.RowIdLifetime;
import java.sql.SQLException;
import java.sql.Types;
import java.util.ArrayList;
import java.util.List;
import com.mysql.jdbc.Field;
public class JDBC4DatabaseMetaData extends DatabaseMetaData {
public JDBC4DatabaseMetaData(MySQLConnection connToSet, String databaseToSet) {
super(connToSet, databaseToSet);
}
public RowIdLifetime getRowIdLifetime() throws SQLException {
return RowIdLifetime.ROWID_UNSUPPORTED;
}
/**
* Returns true if this either implements the interface argument or is directly or indirectly a wrapper
* for an object that does. Returns false otherwise. If this implements the interface then return true,
* else if this is a wrapper then return the result of recursively calling isWrapperFor on the wrapped
* object. If this does not implement the interface and is not a wrapper, return false.
* This method should be implemented as a low-cost operation compared to unwrap so that
* callers can use this method to avoid expensive unwrap calls that may fail. If this method
* returns true then calling unwrap with the same argument should succeed.
*
* @param interfaces
* a Class defining an interface.
* @return true if this implements the interface or directly or indirectly wraps an object that does.
* @throws java.sql.SQLException
* if an error occurs while determining whether this is a wrapper
* for an object with the given interface.
* @since 1.6
*/
public boolean isWrapperFor(Class iface) throws SQLException {
// This works for classes that aren't actually wrapping anything
return iface.isInstance(this);
}
/**
* Returns an object that implements the given interface to allow access to non-standard methods,
* or standard methods not exposed by the proxy.
* The result may be either the object found to implement the interface or a proxy for that object.
* If the receiver implements the interface then that is the object. If the receiver is a wrapper
* and the wrapped object implements the interface then that is the object. Otherwise the object is
* the result of calling unwrap recursively on the wrapped object. If the receiver is not a
* wrapper and does not implement the interface, then an SQLException is thrown.
*
* @param iface
* A Class defining an interface that the result must implement.
* @return an object that implements the interface. May be a proxy for the actual implementing object.
* @throws java.sql.SQLException
* If no object found that implements the interface
* @since 1.6
*/
public T unwrap(java.lang.Class iface) throws java.sql.SQLException {
try {
// This works for classes that aren't actually wrapping anything
return iface.cast(this);
} catch (ClassCastException cce) {
throw SQLError.createSQLException("Unable to unwrap to " + iface.toString(), SQLError.SQL_STATE_ILLEGAL_ARGUMENT,
this.conn.getExceptionInterceptor());
}
}
public boolean autoCommitFailureClosesAllResultSets() throws SQLException {
return false;
}
/**
* Changes in behavior introduced in JDBC4 when #getFunctionColumns became available. Overrides
* DatabaseMetaData#getProcedureColumns
*
* @see DatabaseMetaData#getProcedureColumns
* @since 1.6
*/
public java.sql.ResultSet getProcedureColumns(String catalog, String schemaPattern, String procedureNamePattern, String columnNamePattern)
throws SQLException {
Field[] fields = createProcedureColumnsFields();
return getProcedureOrFunctionColumns(fields, catalog, schemaPattern, procedureNamePattern, columnNamePattern, true,
conn.getGetProceduresReturnsFunctions());
}
/**
* Changes in behavior introduced in JDBC4 when #getFunctions became available. Overrides
* DatabaseMetaData#getProcedures.
*
* @see DatabaseMetaData#getProcedures
* @since 1.6
*/
public java.sql.ResultSet getProcedures(String catalog, String schemaPattern, String procedureNamePattern) throws SQLException {
Field[] fields = createFieldMetadataForGetProcedures();
return getProceduresAndOrFunctions(fields, catalog, schemaPattern, procedureNamePattern, true, conn.getGetProceduresReturnsFunctions());
}
/**
* Overrides DatabaseMetaData#getJDBC4FunctionNoTableConstant.
*
* @return java.sql.DatabaseMetaData#functionNoTable
*/
protected int getJDBC4FunctionNoTableConstant() {
return functionNoTable;
}
/**
* This method overrides DatabaseMetaData#getColumnType(boolean, boolean, boolean, boolean).
*
* @see JDBC4DatabaseMetaData#getProcedureOrFunctionColumnType(boolean, boolean, boolean, boolean)
*/
protected int getColumnType(boolean isOutParam, boolean isInParam, boolean isReturnParam, boolean forGetFunctionColumns) {
return JDBC4DatabaseMetaData.getProcedureOrFunctionColumnType(isOutParam, isInParam, isReturnParam, forGetFunctionColumns);
}
/**
* Determines the COLUMN_TYPE information based on parameter type (IN, OUT or INOUT) or function return parameter.
*
* @param isOutParam
* Indicates whether it's an output parameter.
* @param isInParam
* Indicates whether it's an input parameter.
* @param isReturnParam
* Indicates whether it's a function return parameter.
* @param forGetFunctionColumns
* Indicates whether the column belong to a function.
*
* @return The corresponding COLUMN_TYPE as in java.sql.getProcedureColumns API.
*/
protected static int getProcedureOrFunctionColumnType(boolean isOutParam, boolean isInParam, boolean isReturnParam, boolean forGetFunctionColumns) {
if (isInParam && isOutParam) {
return forGetFunctionColumns ? functionColumnInOut : procedureColumnInOut;
} else if (isInParam) {
return forGetFunctionColumns ? functionColumnIn : procedureColumnIn;
} else if (isOutParam) {
return forGetFunctionColumns ? functionColumnOut : procedureColumnOut;
} else if (isReturnParam) {
return forGetFunctionColumns ? functionReturn : procedureColumnReturn;
} else {
return forGetFunctionColumns ? functionColumnUnknown : procedureColumnUnknown;
}
}
}
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