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1
19
20
21 package org.apache.cayenne.util;
22
23 import java.math.BigDecimal  ;
24 import java.math.BigInteger ;
25
26 import org.apache.cayenne.exp.ExpressionException;
27
28
34 public final class ConversionUtil {
35
36 public static int toInt(Object object, int defaultValue) {
37 if (object == null) {
38 return defaultValue;
39 }
40 else if (object instanceof Number ) {
41 return ((Number ) object).intValue();
42 }
43 else if (object instanceof String ) {
44 try {
45 return Integer.parseInt((String ) object);
46 }
47 catch (NumberFormatException ex) {
48 return defaultValue;
49 }
50 }
51
52 return defaultValue;
53 }
54
55 public static boolean toBoolean(Object object) {
56 if (object instanceof Boolean ) {
57 return ((Boolean ) object).booleanValue();
58 }
59
60 if (object instanceof Number ) {
61 return ((Number ) object).intValue() != 0;
62 }
63
64 return object != null;
65 }
66
67 public static BigDecimal toBigDecimal(Object object) {
68
69 if (object == null) {
70 return null;
71 }
72 else if (object instanceof BigDecimal ) {
73 return (BigDecimal ) object;
74 }
75 else if (object instanceof BigInteger ) {
76 return new BigDecimal ((BigInteger ) object);
77 }
78 else if (object instanceof Number ) {
79 return new BigDecimal (((Number ) object).doubleValue());
80 }
81
82 throw new ExpressionException("Can't convert to BigDecimal: " + object);
83 }
84
85
88 public static Comparable toComparable(Object object) {
89 if (object == null) {
90 return null;
91 }
92 else if (object instanceof Comparable ) {
93 return (Comparable ) object;
94 }
95 else if (object instanceof StringBuffer ) {
96 return object.toString();
97 }
98 else if (object instanceof char[]) {
99 return new String ((char[]) object);
100 }
101 else {
102 throw new ClassCastException (
103 "Invalid Comparable class:" + object.getClass().getName());
104 }
105 }
106
107
110 public static String toString(Object object) {
111 if (object == null) {
112 return null;
113 }
114 else if (object instanceof String ) {
115 return (String ) object;
116 }
117 else if (object instanceof StringBuffer ) {
118 return object.toString();
119 }
120 else if (object instanceof char[]) {
121 return new String ((char[]) object);
122 }
123 else {
124 throw new ClassCastException (
125 "Invalid class for String conversion:" + object.getClass().getName());
126 }
127 }
128
129
132 public static Object toUpperCase(Object object) {
133 if ((object instanceof String ) || (object instanceof StringBuffer )) {
134 return object.toString().toUpperCase();
135 }
136 else if (object instanceof char[]) {
137 return new String ((char[]) object).toUpperCase();
138 }
139 else {
140 return object;
141 }
142 }
143
144 private ConversionUtil() {
145 }
146 }
147 |
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