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| 1 | /* | ||
| 2 | * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. | ||
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| 4 | * | ||
| 5 | * This code is free software; you can redistribute it and/or modify it | ||
| 6 | * under the terms of the GNU General Public License version 2 only, as | ||
| 7 | * published by the Free Software Foundation. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | package com.sun.rowset.internal; | ||
| 27 | |||
| 28 | import com.sun.rowset.JdbcRowSetResourceBundle; | ||
| 29 | import java.sql.*; | ||
| 30 | import javax.sql.*; | ||
| 31 | import java.io.*; | ||
| 32 | import java.util.*; | ||
| 33 | |||
| 34 | /** | ||
| 35 | * A class used internally to manage a <code>CachedRowSet</code> object's | ||
| 36 | * insert row. This class keeps track of the number of columns in the | ||
| 37 | * insert row and which columns have had a value inserted. It provides | ||
| 38 | * methods for retrieving a column value, setting a column value, and finding | ||
| 39 | * out whether the insert row is complete. | ||
| 40 | */ | ||
| 41 | public class InsertRow extends BaseRow implements Serializable, Cloneable { | ||
| 42 | |||
| 43 | /** | ||
| 44 | * An internal <code>BitSet</code> object used to keep track of the | ||
| 45 | * columns in this <code>InsertRow</code> object that have had a value | ||
| 46 | * inserted. | ||
| 47 | */ | ||
| 48 | private BitSet colsInserted; | ||
| 49 | |||
| 50 | /** | ||
| 51 | * The number of columns in this <code>InsertRow</code> object. | ||
| 52 | */ | ||
| 53 | private int cols; | ||
| 54 | |||
| 55 | private JdbcRowSetResourceBundle resBundle; | ||
| 56 | |||
| 57 | /** | ||
| 58 | * Creates an <code>InsertRow</code> object initialized with the | ||
| 59 | * given number of columns, an array for keeping track of the | ||
| 60 | * original values in this insert row, and a | ||
| 61 | * <code>BitSet</code> object with the same number of bits as | ||
| 62 | * there are columns. | ||
| 63 | * | ||
| 64 | * @param numCols an <code>int</code> indicating the number of columns | ||
| 65 | * in this <code>InsertRow</code> object | ||
| 66 | */ | ||
| 67 | public InsertRow(int numCols) { | ||
| 68 | origVals = new Object[numCols]; | ||
| 69 | colsInserted = new BitSet(numCols); | ||
| 70 | cols = numCols; | ||
| 71 | try { | ||
| 72 | resBundle = JdbcRowSetResourceBundle.getJdbcRowSetResourceBundle(); | ||
| 73 | } catch(IOException ioe) { | ||
| 74 | throw new RuntimeException(ioe); | ||
| 75 | } | ||
| 76 | } | ||
| 77 | |||
| 78 | /** | ||
| 79 | * Sets the bit in this <code>InsertRow</code> object's internal | ||
| 80 | * <code>BitSet</code> object that corresponds to the specified column | ||
| 81 | * in this <code>InsertRow</code> object. Setting a bit indicates | ||
| 82 | * that a value has been set. | ||
| 83 | * | ||
| 84 | * @param col the number of the column to be marked as inserted; | ||
| 85 | * the first column is <code>1</code> | ||
| 86 | */ | ||
| 87 | protected void markColInserted(int col) { | ||
| 88 | colsInserted.set(col); | ||
| 89 | } | ||
| 90 | |||
| 91 | /** | ||
| 92 | * Indicates whether this <code>InsertRow</code> object has a value | ||
| 93 | * for every column that cannot be null. | ||
| 94 | * @param RowSetMD the <code>RowSetMetaData</code> object for the | ||
| 95 | * <code>CachedRowSet</code> object that maintains this | ||
| 96 | * <code>InsertRow</code> object | ||
| 97 | * @return <code>true</code> if this <code>InsertRow</code> object is | ||
| 98 | * complete; <code>false</code> otherwise | ||
| 99 | * @throws SQLException if there is an error accessing data | ||
| 100 | */ | ||
| 101 | public boolean isCompleteRow(RowSetMetaData RowSetMD) throws SQLException { | ||
| 102 | for (int i = 0; i < cols; i++) { | ||
| 103 | if (colsInserted.get(i) == false && | ||
| 104 | RowSetMD.isNullable(i + 1) == | ||
| 105 | ResultSetMetaData.columnNoNulls) { | ||
| 106 | return false; | ||
| 107 | } | ||
| 108 | |||
| 109 | } | ||
| 110 | return true; | ||
| 111 | } | ||
| 112 | |||
| 113 | /** | ||
| 114 | * Clears all the bits in the internal <code>BitSet</code> object | ||
| 115 | * maintained by this <code>InsertRow</code> object. Clearing all the bits | ||
| 116 | * indicates that none of the columns have had a value inserted. | ||
| 117 | */ | ||
| 118 | public void initInsertRow() { | ||
| 119 | for (int i = 0; i < cols; i++) { | ||
| 120 | colsInserted.clear(i); | ||
| 121 | } | ||
| 122 | } | ||
| 123 | |||
| 124 | /** | ||
| 125 | * Retrieves the value of the designated column in this | ||
| 126 | * <code>InsertRow</code> object. If no value has been inserted | ||
| 127 | * into the designated column, this method throws an | ||
| 128 | * <code>SQLException</code>. | ||
| 129 | * | ||
| 130 | * @param idx the column number of the value to be retrieved; | ||
| 131 | * the first column is <code>1</code> | ||
| 132 | * @throws SQLException if no value has been inserted into | ||
| 133 | * the designated column | ||
| 134 | */ | ||
| 135 | public Object getColumnObject(int idx) throws SQLException { | ||
| 136 | if (colsInserted.get(idx - 1) == false) { | ||
| 137 | throw new SQLException(resBundle.handleGetObject("insertrow.novalue").toString()); | ||
| 138 | } | ||
| 139 | return (origVals[idx - 1]); | ||
| 140 | } | ||
| 141 | |||
| 142 | /** | ||
| 143 | * Sets the element in this <code>InsertRow</code> object's | ||
| 144 | * internal array of original values that corresponds to the | ||
| 145 | * designated column with the given value. If the third | ||
| 146 | * argument is <code>true</code>, | ||
| 147 | * which means that the cursor is on the insert row, this | ||
| 148 | * <code>InsertRow</code> object's internal <code>BitSet</code> object | ||
| 149 | * is set so that the bit corresponding to the column being set is | ||
| 150 | * turned on. | ||
| 151 | * | ||
| 152 | * @param idx the number of the column in the insert row to be set; | ||
| 153 | * the first column is <code>1</code> | ||
| 154 | * @param val the value to be set | ||
| 155 | */ | ||
| 156 | public void setColumnObject(int idx, Object val) { | ||
| 157 | origVals[idx - 1] = val; | ||
| 158 | markColInserted(idx - 1); | ||
| 159 | } | ||
| 160 | |||
| 161 | /** | ||
| 162 | * This method re populates the resBundle | ||
| 163 | * during the deserialization process | ||
| 164 | * | ||
| 165 | */ | ||
| 166 | private void readObject(ObjectInputStream ois) throws IOException, ClassNotFoundException { | ||
| 167 | // Default state initialization happens here | ||
| 168 | ois.defaultReadObject(); | ||
| 169 | // Initialization of transient Res Bundle happens here . | ||
| 170 | try { | ||
| 171 | resBundle = JdbcRowSetResourceBundle.getJdbcRowSetResourceBundle(); | ||
| 172 | } catch(IOException ioe) { | ||
| 173 | throw new RuntimeException(ioe); | ||
| 174 | } | ||
| 175 | |||
| 176 | } | ||
| 177 | |||
| 178 | static final long serialVersionUID = 1066099658102869344L; | ||
| 179 | } | ||