| /* |
| * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code 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 |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package javax.sql.rowset; |
| |
| import java.sql.*; |
| import javax.sql.*; |
| import java.io.*; |
| |
| import java.lang.reflect.*; |
| |
| /** |
| * Provides implementations for the methods that set and get |
| * metadata information about a <code>RowSet</code> object's columns. |
| * A <code>RowSetMetaDataImpl</code> object keeps track of the |
| * number of columns in the rowset and maintains an internal array |
| * of column attributes for each column. |
| * <P> |
| * A <code>RowSet</code> object creates a <code>RowSetMetaDataImpl</code> |
| * object internally in order to set and retrieve information about |
| * its columns. |
| * <P> |
| * NOTE: All metadata in a <code>RowSetMetaDataImpl</code> object |
| * should be considered as unavailable until the <code>RowSet</code> object |
| * that it describes is populated. |
| * Therefore, any <code>RowSetMetaDataImpl</code> method that retrieves information |
| * is defined as having unspecified behavior when it is called |
| * before the <code>RowSet</code> object contains data. |
| */ |
| public class RowSetMetaDataImpl implements RowSetMetaData, Serializable { |
| |
| /** |
| * The number of columns in the <code>RowSet</code> object that created |
| * this <code>RowSetMetaDataImpl</code> object. |
| * @serial |
| */ |
| private int colCount; |
| |
| /** |
| * An array of <code>ColInfo</code> objects used to store information |
| * about each column in the <code>RowSet</code> object for which |
| * this <code>RowSetMetaDataImpl</code> object was created. The first |
| * <code>ColInfo</code> object in this array contains information about |
| * the first column in the <code>RowSet</code> object, the second element |
| * contains information about the second column, and so on. |
| * @serial |
| */ |
| private ColInfo[] colInfo; |
| |
| /** |
| * Checks to see that the designated column is a valid column number for |
| * the <code>RowSet</code> object for which this <code>RowSetMetaDataImpl</code> |
| * was created. To be valid, a column number must be greater than |
| * <code>0</code> and less than or equal to the number of columns in a row. |
| * @throws <code>SQLException</code> with the message "Invalid column index" |
| * if the given column number is out of the range of valid column |
| * numbers for the <code>RowSet</code> object |
| */ |
| private void checkColRange(int col) throws SQLException { |
| if (col <= 0 || col > colCount) { |
| throw new SQLException("Invalid column index :"+col); |
| } |
| } |
| |
| /** |
| * Checks to see that the given SQL type is a valid column type and throws an |
| * <code>SQLException</code> object if it is not. |
| * To be valid, a SQL type must be one of the constant values |
| * in the <code><a href="../../sql/Types.html">java.sql.Types</a></code> |
| * class. |
| * |
| * @param SQLType an <code>int</code> defined in the class <code>java.sql.Types</code> |
| * @throws SQLException if the given <code>int</code> is not a constant defined in the |
| * class <code>java.sql.Types</code> |
| */ |
| private void checkColType(int SQLType) throws SQLException { |
| try { |
| Class c = java.sql.Types.class; |
| Field[] publicFields = c.getFields(); |
| int fieldValue = 0; |
| for (int i = 0; i < publicFields.length; i++) { |
| fieldValue = publicFields[i].getInt(c); |
| if (fieldValue == SQLType) { |
| return; |
| } |
| } |
| } catch (Exception e) { |
| throw new SQLException(e.getMessage()); |
| } |
| throw new SQLException("Invalid SQL type for column"); |
| } |
| |
| /** |
| * Sets to the given number the number of columns in the <code>RowSet</code> |
| * object for which this <code>RowSetMetaDataImpl</code> object was created. |
| * |
| * @param columnCount an <code>int</code> giving the number of columns in the |
| * <code>RowSet</code> object |
| * @throws SQLException if the given number is equal to or less than zero |
| */ |
| public void setColumnCount(int columnCount) throws SQLException { |
| |
| if (columnCount <= 0) { |
| throw new SQLException("Invalid column count. Cannot be less " + |
| "or equal to zero"); |
| } |
| |
| colCount = columnCount; |
| |
| // If the colCount is Integer.MAX_VALUE, |
| // we do not initialize the colInfo object. |
| // even if we try to initialize the colCount with |
| // colCount = Integer.MAx_VALUE-1, the colInfo |
| // initialization fails throwing an ERROR |
| // OutOfMemory Exception. So we do not initialize |
| // colInfo at Integer.MAX_VALUE. This is to pass TCK. |
| |
| if(!(colCount == Integer.MAX_VALUE)) { |
| colInfo = new ColInfo[colCount + 1]; |
| |
| for (int i=1; i <= colCount; i++) { |
| colInfo[i] = new ColInfo(); |
| } |
| } |
| |
| |
| } |
| |
| /** |
| * Sets whether the designated column is automatically |
| * numbered, thus read-only, to the given <code>boolean</code> |
| * value. |
| * |
| * @param columnIndex the first column is 1, the second is 2, and so on; |
| * must be between <code>1</code> and the number of columns |
| * in the rowset, inclusive |
| * @param property <code>true</code> if the given column is |
| * automatically incremented; <code>false</code> |
| * otherwise |
| * @throws <code>SQLException</code> if a database access error occurs or |
| * the given index is out of bounds |
| */ |
| public void setAutoIncrement(int columnIndex, boolean property) throws SQLException { |
| checkColRange(columnIndex); |
| colInfo[columnIndex].autoIncrement = property; |
| } |
| |
| /** |
| * Sets whether the name of the designated column is case sensitive to |
| * the given <code>boolean</code>. |
| * |
| * @param columnIndex the first column is 1, the second is 2, and so on; |
| * must be between <code>1</code> and the number of columns |
| * in the rowset, inclusive |
| * @param property <code>true</code> to indicate that the column |
| * name is case sensitive; <code>false</code> otherwise |
| * @throws SQLException if a database access error occurs or |
| * the given column number is out of bounds |
| */ |
| public void setCaseSensitive(int columnIndex, boolean property) throws SQLException { |
| checkColRange(columnIndex); |
| colInfo[columnIndex].caseSensitive = property; |
| } |
| |
| /** |
| * Sets whether a value stored in the designated column can be used |
| * in a <code>WHERE</code> clause to the given <code>boolean</code> value. |
| * |
| * @param columnIndex the first column is 1, the second is 2, and so on; |
| * must be between <code>1</code> and the number |
| * of columns in the rowset, inclusive |
| * @param property <code>true</code> to indicate that a column |
| * value can be used in a <code>WHERE</code> clause; |
| * <code>false</code> otherwise |
| * |
| * @throws <code>SQLException</code> if a database access error occurs or |
| * the given column number is out of bounds |
| */ |
| public void setSearchable(int columnIndex, boolean property) |
| throws SQLException { |
| checkColRange(columnIndex); |
| colInfo[columnIndex].searchable = property; |
| } |
| |
| /** |
| * Sets whether a value stored in the designated column is a cash |
| * value to the given <code>boolean</code>. |
| * |
| * @param columnIndex the first column is 1, the second is 2, and so on; |
| * must be between <code>1</code> and the number of columns, |
| * inclusive between <code>1</code> and the number of columns, inclusive |
| * @param property true if the value is a cash value; false otherwise. |
| * @throws <code>SQLException</code> if a database access error occurs |
| * or the given column number is out of bounds |
| */ |
| public void setCurrency(int columnIndex, boolean property) |
| throws SQLException { |
| checkColRange(columnIndex); |
| colInfo[columnIndex].currency = property; |
| } |
| |
| /** |
| * Sets whether a value stored in the designated column can be set |
| * to <code>NULL</code> to the given constant from the interface |
| * <code>ResultSetMetaData</code>. |
| * |
| * @param columnIndex the first column is 1, the second is 2, and so on; |
| * must be between <code>1</code> and the number of columns, inclusive |
| * @param property one of the following <code>ResultSetMetaData</code> constants: |
| * <code>columnNoNulls</code>, |
| * <code>columnNullable</code>, or |
| * <code>columnNullableUnknown</code> |
| * |
| * @throws <code>SQLException</code> if a database access error occurs, |
| * the given column number is out of bounds, or the value supplied |
| * for the <i>property</i> parameter is not one of the following |
| * constants: |
| * <code>ResultSetMetaData.columnNoNulls</code>, |
| * <code>ResultSetMetaData.columnNullable</code>, or |
| * <code>ResultSetMetaData.columnNullableUnknown</code> |
| */ |
| public void setNullable(int columnIndex, int property) throws SQLException { |
| if ((property < ResultSetMetaData.columnNoNulls) || |
| property > ResultSetMetaData.columnNullableUnknown) { |
| throw new SQLException("Invalid nullable constant set. Must be " + |
| "either columnNoNulls, columnNullable or columnNullableUnknown"); |
| } |
| checkColRange(columnIndex); |
| colInfo[columnIndex].nullable = property; |
| } |
| |
| /** |
| * Sets whether a value stored in the designated column is a signed |
| * number to the given <code>boolean</code>. |
| * |
| * @param columnIndex the first column is 1, the second is 2, and so on; |
| * must be between <code>1</code> and the number of columns, inclusive |
| * @param property <code>true</code> to indicate that a column |
| * value is a signed number; |
| * <code>false</code> to indicate that it is not |
| * @throws SQLException if a database access error occurs |
| * or the given column number is out of bounds |
| */ |
| public void setSigned(int columnIndex, boolean property) throws SQLException { |
| checkColRange(columnIndex); |
| colInfo[columnIndex].signed = property; |
| } |
| |
| /** |
| * Sets the normal maximum number of chars in the designated column |
| * to the given number. |
| * |
| * @param columnIndex the first column is 1, the second is 2, and so on; |
| * must be between <code>1</code> and the number of columns, inclusive |
| * @param size the maximum size of the column in chars; must be |
| * <code>0</code> or more |
| * @throws SQLException if a database access error occurs, |
| * the given column number is out of bounds, or <i>size</i> is |
| * less than <code>0</code> |
| */ |
| public void setColumnDisplaySize(int columnIndex, int size) throws SQLException { |
| if (size < 0) { |
| throw new SQLException("Invalid column display size. Cannot be less " + |
| "than zero"); |
| } |
| checkColRange(columnIndex); |
| colInfo[columnIndex].columnDisplaySize = size; |
| } |
| |
| /** |
| * Sets the suggested column label for use in printouts and |
| * displays, if any, to <i>label</i>. If <i>label</i> is |
| * <code>null</code>, the column label is set to an empty string |
| * (""). |
| * |
| * @param columnIndex the first column is 1, the second is 2, and so on; |
| * must be between <code>1</code> and the number of columns, inclusive |
| * @param label the column label to be used in printouts and displays; if the |
| * column label is <code>null</code>, an empty <code>String</code> is |
| * set |
| * @throws SQLException if a database access error occurs |
| * or the given column index is out of bounds |
| */ |
| public void setColumnLabel(int columnIndex, String label) throws SQLException { |
| checkColRange(columnIndex); |
| if (label != null) { |
| colInfo[columnIndex].columnLabel = label; |
| } else { |
| colInfo[columnIndex].columnLabel = ""; |
| } |
| } |
| |
| /** |
| * Sets the column name of the designated column to the given name. |
| * |
| * @param columnIndex the first column is 1, the second is 2, and so on; |
| * must be between <code>1</code> and the number of columns, inclusive |
| * @param columnName a <code>String</code> object indicating the column name; |
| * if the given name is <code>null</code>, an empty <code>String</code> |
| * is set |
| * @throws SQLException if a database access error occurs or the given column |
| * index is out of bounds |
| */ |
| public void setColumnName(int columnIndex, String columnName) throws SQLException { |
| checkColRange(columnIndex); |
| if (columnName != null) { |
| colInfo[columnIndex].columnName = columnName; |
| } else { |
| colInfo[columnIndex].columnName = ""; |
| } |
| } |
| |
| /** |
| * Sets the designated column's table's schema name, if any, to |
| * <i>schemaName</i>. If <i>schemaName</i> is <code>null</code>, |
| * the schema name is set to an empty string (""). |
| * |
| * @param columnIndex the first column is 1, the second is 2, and so on; |
| * must be between <code>1</code> and the number of columns, inclusive |
| * @param schemaName the schema name for the table from which a value in the |
| * designated column was derived; may be an empty <code>String</code> |
| * or <code>null</code> |
| * @throws SQLException if a database access error occurs |
| * or the given column number is out of bounds |
| */ |
| public void setSchemaName(int columnIndex, String schemaName) throws SQLException { |
| checkColRange(columnIndex); |
| if (schemaName != null ) { |
| colInfo[columnIndex].schemaName = schemaName; |
| } else { |
| colInfo[columnIndex].schemaName = ""; |
| } |
| } |
| |
| /** |
| * Sets the total number of decimal digits in a value stored in the |
| * designated column to the given number. |
| * |
| * @param columnIndex the first column is 1, the second is 2, and so on; |
| * must be between <code>1</code> and the number of columns, inclusive |
| * @param precision the total number of decimal digits; must be <code>0</code> |
| * or more |
| * @throws SQLException if a database access error occurs, |
| * <i>columnIndex</i> is out of bounds, or <i>precision</i> |
| * is less than <code>0</code> |
| */ |
| public void setPrecision(int columnIndex, int precision) throws SQLException { |
| |
| if (precision < 0) { |
| throw new SQLException("Invalid precision value. Cannot be less " + |
| "than zero"); |
| } |
| checkColRange(columnIndex); |
| colInfo[columnIndex].colPrecision = precision; |
| } |
| |
| /** |
| * Sets the number of digits to the right of the decimal point in a value |
| * stored in the designated column to the given number. |
| * |
| * @param columnIndex the first column is 1, the second is 2, and so on; |
| * must be between <code>1</code> and the number of columns, inclusive |
| * @param scale the number of digits to the right of the decimal point; must be |
| * zero or greater |
| * @throws SQLException if a database access error occurs, |
| * <i>columnIndex</i> is out of bounds, or <i>scale</i> |
| * is less than <code>0</code> |
| */ |
| public void setScale(int columnIndex, int scale) throws SQLException { |
| if (scale < 0) { |
| throw new SQLException("Invalid scale size. Cannot be less " + |
| "than zero"); |
| } |
| checkColRange(columnIndex); |
| colInfo[columnIndex].colScale = scale; |
| } |
| |
| /** |
| * Sets the name of the table from which the designated column |
| * was derived to the given table name. |
| * |
| * @param columnIndex the first column is 1, the second is 2, and so on; |
| * must be between <code>1</code> and the number of columns, inclusive |
| * @param tableName the column's table name; may be <code>null</code> or an |
| * empty string |
| * @throws SQLException if a database access error occurs |
| * or the given column number is out of bounds |
| */ |
| public void setTableName(int columnIndex, String tableName) throws SQLException { |
| checkColRange(columnIndex); |
| if (tableName != null) { |
| colInfo[columnIndex].tableName = tableName; |
| } else { |
| colInfo[columnIndex].tableName = ""; |
| } |
| } |
| |
| /** |
| * Sets the catalog name of the table from which the designated |
| * column was derived to <i>catalogName</i>. If <i>catalogName</i> |
| * is <code>null</code>, the catalog name is set to an empty string. |
| * |
| * @param columnIndex the first column is 1, the second is 2, and so on; |
| * must be between <code>1</code> and the number of columns, inclusive |
| * @param catalogName the column's table's catalog name; if the catalogName |
| * is <code>null</code>, an empty <code>String</code> is set |
| * @throws SQLException if a database access error occurs |
| * or the given column number is out of bounds |
| */ |
| public void setCatalogName(int columnIndex, String catalogName) throws SQLException { |
| checkColRange(columnIndex); |
| if (catalogName != null) |
| colInfo[columnIndex].catName = catalogName; |
| else |
| colInfo[columnIndex].catName = ""; |
| } |
| |
| /** |
| * Sets the SQL type code for values stored in the designated column |
| * to the given type code from the class <code>java.sql.Types</code>. |
| * |
| * @param columnIndex the first column is 1, the second is 2, and so on; |
| * must be between <code>1</code> and the number of columns, inclusive |
| * @param SQLType the designated column's SQL type, which must be one of the |
| * constants in the class <code>java.sql.Types</code> |
| * @throws SQLException if a database access error occurs, |
| * the given column number is out of bounds, or the column type |
| * specified is not one of the constants in |
| * <code>java.sql.Types</code> |
| * @see java.sql.Types |
| */ |
| public void setColumnType(int columnIndex, int SQLType) throws SQLException { |
| // examine java.sql.Type reflectively, loop on the fields and check |
| // this. Separate out into a private method |
| checkColType(SQLType); |
| checkColRange(columnIndex); |
| colInfo[columnIndex].colType = SQLType; |
| } |
| |
| /** |
| * Sets the type name used by the data source for values stored in the |
| * designated column to the given type name. |
| * |
| * @param columnIndex the first column is 1, the second is 2, and so on; |
| * must be between <code>1</code> and the number of columns, inclusive |
| * @param typeName the data source-specific type name; if <i>typeName</i> is |
| * <code>null</code>, an empty <code>String</code> is set |
| * @throws SQLException if a database access error occurs |
| * or the given column number is out of bounds |
| */ |
| public void setColumnTypeName(int columnIndex, String typeName) |
| throws SQLException { |
| checkColRange(columnIndex); |
| if (typeName != null) { |
| colInfo[columnIndex].colTypeName = typeName; |
| } else { |
| colInfo[columnIndex].colTypeName = ""; |
| } |
| } |
| |
| /** |
| * Retrieves the number of columns in the <code>RowSet</code> object |
| * for which this <code>RowSetMetaDataImpl</code> object was created. |
| * |
| * @return the number of columns |
| * @throws SQLException if an error occurs determining the column count |
| */ |
| public int getColumnCount() throws SQLException { |
| return colCount; |
| } |
| |
| /** |
| * Retrieves whether a value stored in the designated column is |
| * automatically numbered, and thus readonly. |
| * |
| * @param columnIndex the first column is 1, the second is 2, and so on; |
| * must be between <code>1</code> and the number of columns, inclusive |
| * @return <code>true</code> if the column is automatically numbered; |
| * <code>false</code> otherwise |
| * @throws SQLException if a database access error occurs |
| * or the given column number is out of bounds |
| */ |
| public boolean isAutoIncrement(int columnIndex) throws SQLException { |
| checkColRange(columnIndex); |
| return colInfo[columnIndex].autoIncrement; |
| } |
| |
| /** |
| * Indicates whether the case of the designated column's name |
| * matters. |
| * |
| * @param columnIndex the first column is 1, the second is 2, and so on; |
| * must be between <code>1</code> and the number of columns, inclusive |
| * @return <code>true</code> if the column name is case sensitive; |
| * <code>false</code> otherwise |
| * @throws SQLException if a database access error occurs |
| * or the given column number is out of bounds |
| */ |
| public boolean isCaseSensitive(int columnIndex) throws SQLException { |
| checkColRange(columnIndex); |
| return colInfo[columnIndex].caseSensitive; |
| } |
| |
| /** |
| * Indicates whether a value stored in the designated column |
| * can be used in a <code>WHERE</code> clause. |
| * |
| * @param columnIndex the first column is 1, the second is 2, and so on; |
| * must be between <code>1</code> and the number of columns, inclusive |
| * @return <code>true</code> if a value in the designated column can be used in a |
| * <code>WHERE</code> clause; <code>false</code> otherwise |
| * @throws SQLException if a database access error occurs |
| * or the given column number is out of bounds |
| */ |
| public boolean isSearchable(int columnIndex) throws SQLException { |
| checkColRange(columnIndex); |
| return colInfo[columnIndex].searchable; |
| } |
| |
| /** |
| * Indicates whether a value stored in the designated column |
| * is a cash value. |
| * |
| * @param columnIndex the first column is 1, the second is 2, and so on; |
| * must be between <code>1</code> and the number of columns, inclusive |
| * @return <code>true</code> if a value in the designated column is a cash value; |
| * <code>false</code> otherwise |
| * @throws SQLException if a database access error occurs |
| * or the given column number is out of bounds |
| */ |
| public boolean isCurrency(int columnIndex) throws SQLException { |
| checkColRange(columnIndex); |
| return colInfo[columnIndex].currency; |
| } |
| |
| /** |
| * Retrieves a constant indicating whether it is possible |
| * to store a <code>NULL</code> value in the designated column. |
| * |
| * @param columnIndex the first column is 1, the second is 2, and so on; |
| * must be between <code>1</code> and the number of columns, inclusive |
| * @return a constant from the <code>ResultSetMetaData</code> interface; |
| * either <code>columnNoNulls</code>, |
| * <code>columnNullable</code>, or |
| * <code>columnNullableUnknown</code> |
| * @throws SQLException if a database access error occurs |
| * or the given column number is out of bounds |
| */ |
| public int isNullable(int columnIndex) throws SQLException { |
| checkColRange(columnIndex); |
| return colInfo[columnIndex].nullable; |
| } |
| |
| /** |
| * Indicates whether a value stored in the designated column is |
| * a signed number. |
| * |
| * @param columnIndex the first column is 1, the second is 2, and so on; |
| * must be between <code>1</code> and the number of columns, inclusive |
| * @return <code>true</code> if if a value in the designated column is a signed |
| * number; <code>false</code> otherwise |
| * @throws SQLException if a database access error occurs |
| * or the given column number is out of bounds |
| */ |
| public boolean isSigned(int columnIndex) throws SQLException { |
| checkColRange(columnIndex); |
| return colInfo[columnIndex].signed; |
| } |
| |
| /** |
| * Retrieves the normal maximum width in chars of the designated column. |
| * |
| * @param columnIndex the first column is 1, the second is 2, and so on; |
| * must be between <code>1</code> and the number of columns, inclusive |
| * @return the maximum number of chars that can be displayed in the designated |
| * column |
| * @throws SQLException if a database access error occurs |
| * or the given column number is out of bounds |
| */ |
| public int getColumnDisplaySize(int columnIndex) throws SQLException { |
| checkColRange(columnIndex); |
| return colInfo[columnIndex].columnDisplaySize; |
| } |
| |
| /** |
| * Retrieves the the suggested column title for the designated |
| * column for use in printouts and displays. |
| * |
| * @param columnIndex the first column is 1, the second is 2, and so on; |
| * must be between <code>1</code> and the number of columns, inclusive |
| * @return the suggested column name to use in printouts and displays |
| * @throws SQLException if a database access error occurs |
| * or the given column number is out of bounds |
| */ |
| public String getColumnLabel(int columnIndex) throws SQLException { |
| checkColRange(columnIndex); |
| return colInfo[columnIndex].columnLabel; |
| } |
| |
| /** |
| * Retrieves the name of the designated column. |
| * |
| * @param columnIndex the first column is 1, the second is 2, and so on; |
| * must be between <code>1</code> and the number of columns, inclusive |
| * @return the column name of the designated column |
| * @throws SQLException if a database access error occurs |
| * or the given column number is out of bounds |
| */ |
| public String getColumnName(int columnIndex) throws SQLException { |
| checkColRange(columnIndex); |
| return colInfo[columnIndex].columnName; |
| } |
| |
| /** |
| * Retrieves the schema name of the table from which the value |
| * in the designated column was derived. |
| * |
| * @param columnIndex the first column is 1, the second is 2, and so on; |
| * must be between <code>1</code> and the number of columns, |
| * inclusive |
| * @return the schema name or an empty <code>String</code> if no schema |
| * name is available |
| * @throws SQLException if a database access error occurs |
| * or the given column number is out of bounds |
| */ |
| public String getSchemaName(int columnIndex) throws SQLException { |
| checkColRange(columnIndex); |
| String str =""; |
| if(colInfo[columnIndex].schemaName == null){ |
| } else { |
| str = colInfo[columnIndex].schemaName; |
| } |
| return str; |
| } |
| |
| /** |
| * Retrieves the total number of digits for values stored in |
| * the designated column. |
| * |
| * @param columnIndex the first column is 1, the second is 2, and so on; |
| * must be between <code>1</code> and the number of columns, inclusive |
| * @return the precision for values stored in the designated column |
| * @throws SQLException if a database access error occurs |
| * or the given column number is out of bounds |
| */ |
| public int getPrecision(int columnIndex) throws SQLException { |
| checkColRange(columnIndex); |
| return colInfo[columnIndex].colPrecision; |
| } |
| |
| /** |
| * Retrieves the number of digits to the right of the decimal point |
| * for values stored in the designated column. |
| * |
| * @param columnIndex the first column is 1, the second is 2, and so on; |
| * must be between <code>1</code> and the number of columns, inclusive |
| * @return the scale for values stored in the designated column |
| * @throws SQLException if a database access error occurs |
| * or the given column number is out of bounds |
| */ |
| public int getScale(int columnIndex) throws SQLException { |
| checkColRange(columnIndex); |
| return colInfo[columnIndex].colScale; |
| } |
| |
| /** |
| * Retrieves the name of the table from which the value |
| * in the designated column was derived. |
| * |
| * @param columnIndex the first column is 1, the second is 2, and so on; |
| * must be between <code>1</code> and the number of columns, inclusive |
| * @return the table name or an empty <code>String</code> if no table name |
| * is available |
| * @throws SQLException if a database access error occurs |
| * or the given column number is out of bounds |
| */ |
| public String getTableName(int columnIndex) throws SQLException { |
| checkColRange(columnIndex); |
| return colInfo[columnIndex].tableName; |
| } |
| |
| /** |
| * Retrieves the catalog name of the table from which the value |
| * in the designated column was derived. |
| * |
| * @param columnIndex the first column is 1, the second is 2, and so on; |
| * must be between <code>1</code> and the number of columns, inclusive |
| * @return the catalog name of the column's table or an empty |
| * <code>String</code> if no catalog name is available |
| * @throws SQLException if a database access error occurs |
| * or the given column number is out of bounds |
| */ |
| public String getCatalogName(int columnIndex) throws SQLException { |
| checkColRange(columnIndex); |
| String str =""; |
| if(colInfo[columnIndex].catName == null){ |
| } else { |
| str = colInfo[columnIndex].catName; |
| } |
| return str; |
| } |
| |
| /** |
| * Retrieves the type code (one of the <code>java.sql.Types</code> |
| * constants) for the SQL type of the value stored in the |
| * designated column. |
| * |
| * @param columnIndex the first column is 1, the second is 2, and so on; |
| * must be between <code>1</code> and the number of columns, inclusive |
| * @return an <code>int</code> representing the SQL type of values |
| * stored in the designated column |
| * @throws SQLException if a database access error occurs |
| * or the given column number is out of bounds |
| * @see java.sql.Types |
| */ |
| public int getColumnType(int columnIndex) throws SQLException { |
| checkColRange(columnIndex); |
| return colInfo[columnIndex].colType; |
| } |
| |
| /** |
| * Retrieves the DBMS-specific type name for values stored in the |
| * designated column. |
| * |
| * @param columnIndex the first column is 1, the second is 2, and so on; |
| * must be between <code>1</code> and the number of columns, inclusive |
| * @return the type name used by the data source |
| * @throws SQLException if a database access error occurs |
| * or the given column number is out of bounds |
| */ |
| public String getColumnTypeName(int columnIndex) throws SQLException { |
| checkColRange(columnIndex); |
| return colInfo[columnIndex].colTypeName; |
| } |
| |
| |
| /** |
| * Indicates whether the designated column is definitely |
| * not writable, thus readonly. |
| * |
| * @param columnIndex the first column is 1, the second is 2, and so on; |
| * must be between <code>1</code> and the number of columns, inclusive |
| * @return <code>true</code> if this <code>RowSet</code> object is read-Only |
| * and thus not updatable; <code>false</code> otherwise |
| * @throws SQLException if a database access error occurs |
| * or the given column number is out of bounds |
| */ |
| public boolean isReadOnly(int columnIndex) throws SQLException { |
| checkColRange(columnIndex); |
| return colInfo[columnIndex].readOnly; |
| } |
| |
| /** |
| * Indicates whether it is possible for a write operation on |
| * the designated column to succeed. A return value of |
| * <code>true</code> means that a write operation may or may |
| * not succeed. |
| * |
| * @param columnIndex the first column is 1, the second is 2, and so on; |
| * must be between <code>1</code> and the number of columns, inclusive |
| * @return <code>true</code> if a write operation on the designated column may |
| * will succeed; <code>false</code> otherwise |
| * @throws SQLException if a database access error occurs |
| * or the given column number is out of bounds |
| */ |
| public boolean isWritable(int columnIndex) throws SQLException { |
| checkColRange(columnIndex); |
| return colInfo[columnIndex].writable; |
| } |
| |
| /** |
| * Indicates whether a write operation on the designated column |
| * will definitely succeed. |
| * |
| * @param columnIndex the first column is 1, the second is 2, and so on; |
| * must be between <code>1</code> and the number of columns, inclusive |
| * @return <code>true</code> if a write operation on the designated column will |
| * definitely succeed; <code>false</code> otherwise |
| * @throws SQLException if a database access error occurs |
| * or the given column number is out of bounds |
| */ |
| public boolean isDefinitelyWritable(int columnIndex) |
| throws SQLException { return true;} |
| |
| /** |
| * Retrieves the fully-qualified name of the class in the Java |
| * programming language to which a value in the designated column |
| * will be mapped. For example, if the value is an <code>int</code>, |
| * the class name returned by this method will be |
| * <code>java.lang.Integer</code>. |
| * <P> |
| * If the value in the designated column has a custom mapping, |
| * this method returns the name of the class that implements |
| * <code>SQLData</code>. When the method <code>ResultSet.getObject</code> |
| * is called to retrieve a value from the designated column, it will |
| * create an instance of this class or one of its subclasses. |
| * |
| * @param columnIndex the first column is 1, the second is 2, and so on; |
| * must be between <code>1</code> and the number of columns, inclusive |
| * @return the fully-qualified name of the class in the Java programming |
| * language that would be used by the method <code>RowSet.getObject</code> to |
| * retrieve the value in the specified column. This is the class |
| * name used for custom mapping when there is a custom mapping. |
| * @throws SQLException if a database access error occurs |
| * or the given column number is out of bounds |
| */ |
| public String getColumnClassName(int columnIndex) throws SQLException { |
| String className = String.class.getName(); |
| |
| int sqlType = getColumnType(columnIndex); |
| |
| switch (sqlType) { |
| |
| case Types.NUMERIC: |
| case Types.DECIMAL: |
| className = java.math.BigDecimal.class.getName(); |
| break; |
| |
| case Types.BIT: |
| className = java.lang.Boolean.class.getName(); |
| break; |
| |
| case Types.TINYINT: |
| className = java.lang.Byte.class.getName(); |
| break; |
| |
| case Types.SMALLINT: |
| className = java.lang.Short.class.getName(); |
| break; |
| |
| case Types.INTEGER: |
| className = java.lang.Integer.class.getName(); |
| break; |
| |
| case Types.BIGINT: |
| className = java.lang.Long.class.getName(); |
| break; |
| |
| case Types.REAL: |
| className = java.lang.Float.class.getName(); |
| break; |
| |
| case Types.FLOAT: |
| case Types.DOUBLE: |
| className = java.lang.Double.class.getName(); |
| break; |
| |
| case Types.BINARY: |
| case Types.VARBINARY: |
| case Types.LONGVARBINARY: |
| className = "byte[]"; |
| break; |
| |
| case Types.DATE: |
| className = java.sql.Date.class.getName(); |
| break; |
| |
| case Types.TIME: |
| className = java.sql.Time.class.getName(); |
| break; |
| |
| case Types.TIMESTAMP: |
| className = java.sql.Timestamp.class.getName(); |
| break; |
| |
| case Types.BLOB: |
| className = java.sql.Blob.class.getName(); |
| break; |
| |
| case Types.CLOB: |
| className = java.sql.Clob.class.getName(); |
| break; |
| } |
| |
| return className; |
| } |
| |
| /** |
| * 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 <code>unwrap</code> recursively on the wrapped object. If the receiver is not a |
| * wrapper and does not implement the interface, then an <code>SQLException</code> 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> T unwrap(java.lang.Class<T> iface) throws java.sql.SQLException { |
| |
| if(isWrapperFor(iface)) { |
| return iface.cast(this); |
| } else { |
| throw new SQLException("unwrap failed for:"+ iface); |
| } |
| } |
| |
| /** |
| * 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 <code>isWrapperFor</code> 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 <code>unwrap</code> so that |
| * callers can use this method to avoid expensive <code>unwrap</code> calls that may fail. If this method |
| * returns true then calling <code>unwrap</code> 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<?> interfaces) throws SQLException { |
| return interfaces.isInstance(this); |
| } |
| |
| static final long serialVersionUID = 6893806403181801867L; |
| |
| private class ColInfo implements Serializable { |
| /** |
| * The field that indicates whether the value in this column is a number |
| * that is incremented automatically, which makes the value read-only. |
| * <code>true</code> means that the value in this column |
| * is automatically numbered; <code>false</code> means that it is not. |
| * |
| * @serial |
| */ |
| public boolean autoIncrement; |
| |
| /** |
| * The field that indicates whether the value in this column is case sensitive. |
| * <code>true</code> means that it is; <code>false</code> that it is not. |
| * |
| * @serial |
| */ |
| public boolean caseSensitive; |
| |
| /** |
| * The field that indicates whether the value in this column is a cash value |
| * <code>true</code> means that it is; <code>false</code> that it is not. |
| * |
| * @serial |
| */ |
| public boolean currency; |
| |
| /** |
| * The field that indicates whether the value in this column is nullable. |
| * The possible values are the <code>ResultSet</code> constants |
| * <code>columnNoNulls</code>, <code>columnNullable</code>, and |
| * <code>columnNullableUnknown</code>. |
| * |
| * @serial |
| */ |
| public int nullable; |
| |
| /** |
| * The field that indicates whether the value in this column is a signed number. |
| * <code>true</code> means that it is; <code>false</code> that it is not. |
| * |
| * @serial |
| */ |
| public boolean signed; |
| |
| /** |
| * The field that indicates whether the value in this column can be used in |
| * a <code>WHERE</code> clause. |
| * <code>true</code> means that it can; <code>false</code> that it cannot. |
| * |
| * @serial |
| */ |
| public boolean searchable; |
| |
| /** |
| * The field that indicates the normal maximum width in characters for |
| * this column. |
| * |
| * @serial |
| */ |
| public int columnDisplaySize; |
| |
| /** |
| * The field that holds the suggested column title for this column, to be |
| * used in printing and displays. |
| * |
| * @serial |
| */ |
| public String columnLabel; |
| |
| /** |
| * The field that holds the name of this column. |
| * |
| * @serial |
| */ |
| public String columnName; |
| |
| /** |
| * The field that holds the schema name for the table from which this column |
| * was derived. |
| * |
| * @serial |
| */ |
| public String schemaName; |
| |
| /** |
| * The field that holds the precision of the value in this column. For number |
| * types, the precision is the total number of decimal digits; for character types, |
| * it is the maximum number of characters; for binary types, it is the maximum |
| * length in bytes. |
| * |
| * @serial |
| */ |
| public int colPrecision; |
| |
| /** |
| * The field that holds the scale (number of digits to the right of the decimal |
| * point) of the value in this column. |
| * |
| * @serial |
| */ |
| public int colScale; |
| |
| /** |
| * The field that holds the name of the table from which this column |
| * was derived. This value may be the empty string if there is no |
| * table name, such as when this column is produced by a join. |
| * |
| * @serial |
| */ |
| public String tableName =""; |
| |
| /** |
| * The field that holds the catalog name for the table from which this column |
| * was derived. If the DBMS does not support catalogs, the value may be the |
| * empty string. |
| * |
| * @serial |
| */ |
| public String catName; |
| |
| /** |
| * The field that holds the type code from the class <code>java.sql.Types</code> |
| * indicating the type of the value in this column. |
| * |
| * @serial |
| */ |
| public int colType; |
| |
| /** |
| * The field that holds the the type name used by this particular data source |
| * for the value stored in this column. |
| * |
| * @serial |
| */ |
| public String colTypeName; |
| |
| /** |
| * The field that holds the updatablity boolean per column of a RowSet |
| * |
| * @serial |
| */ |
| public boolean readOnly = false; |
| |
| /** |
| * The field that hold the writable boolean per column of a RowSet |
| * |
| *@serial |
| */ |
| public boolean writable = true; |
| } |
| } |
