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1
56
57 package org.objectstyle.cayenne.util;
58
59 import java.math.BigDecimal  ;
60 import java.math.BigInteger ;
61
62 import org.objectstyle.cayenne.exp.ExpressionException;
63
64
70 public final class ConversionUtil {
71
72 public static int toInt(Object object, int defaultValue) {
73 if (object == null) {
74 return defaultValue;
75 }
76 else if (object instanceof Number ) {
77 return ((Number ) object).intValue();
78 }
79 else if (object instanceof String ) {
80 try {
81 return Integer.parseInt((String ) object);
82 }
83 catch (NumberFormatException ex) {
84 return defaultValue;
85 }
86 }
87
88 return defaultValue;
89 }
90
91 public static boolean toBoolean(Object object) {
92 if (object instanceof Boolean ) {
93 return ((Boolean ) object).booleanValue();
94 }
95
96 if (object instanceof Number ) {
97 return ((Number ) object).intValue() != 0;
98 }
99
100 return object != null;
101 }
102
103 public static BigDecimal toBigDecimal(Object object) {
104
105 if (object == null) {
106 return null;
107 }
108 else if (object instanceof BigDecimal ) {
109 return (BigDecimal ) object;
110 }
111 else if (object instanceof BigInteger ) {
112 return new BigDecimal ((BigInteger ) object);
113 }
114 else if (object instanceof Number ) {
115 return new BigDecimal (((Number ) object).doubleValue());
116 }
117
118 throw new ExpressionException("Can't convert to BigDecimal: " + object);
119 }
120
121
124 public static Comparable toComparable(Object object) {
125 if (object == null) {
126 return null;
127 }
128 else if (object instanceof Comparable ) {
129 return (Comparable ) object;
130 }
131 else if (object instanceof StringBuffer ) {
132 return object.toString();
133 }
134 else if (object instanceof char[]) {
135 return new String ((char[]) object);
136 }
137 else {
138 throw new ClassCastException (
139 "Invalid Comparable class:" + object.getClass().getName());
140 }
141 }
142
143
146 public static String toString(Object object) {
147 if (object == null) {
148 return null;
149 }
150 else if (object instanceof String ) {
151 return (String ) object;
152 }
153 else if (object instanceof StringBuffer ) {
154 return object.toString();
155 }
156 else if (object instanceof char[]) {
157 return new String ((char[]) object);
158 }
159 else {
160 throw new ClassCastException (
161 "Invalid class for String conversion:" + object.getClass().getName());
162 }
163 }
164
165
168 public static Object toUpperCase(Object object) {
169 if ((object instanceof String ) || (object instanceof StringBuffer )) {
170 return object.toString().toUpperCase();
171 }
172 else if (object instanceof char[]) {
173 return new String ((char[]) object).toUpperCase();
174 }
175 else {
176 return object;
177 }
178 }
179
180 private ConversionUtil() {
181 }
182 }
183 |
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