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22 * or visit www.oracle.com if you need additional information or have any |
22 * or visit www.oracle.com if you need additional information or have any |
23 * questions. |
23 * questions. |
24 */ |
24 */ |
25 |
25 |
26 package com.sun.tools.javac.util; |
26 package com.sun.tools.javac.util; |
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27 |
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28 import java.util.function.Supplier; |
27 |
29 |
28 /** |
30 /** |
29 * Simple facility for unconditional assertions. |
31 * Simple facility for unconditional assertions. |
30 * The methods in this class are described in terms of equivalent assert |
32 * The methods in this class are described in terms of equivalent assert |
31 * statements, assuming that assertions have been enabled. |
33 * statements, assuming that assertions have been enabled. |
92 if (!cond) |
94 if (!cond) |
93 error(msg); |
95 error(msg); |
94 } |
96 } |
95 |
97 |
96 /** Equivalent to |
98 /** Equivalent to |
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99 * assert cond : msg.get(); |
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100 * Note: message string is computed lazily. |
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101 */ |
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102 public static void check(boolean cond, Supplier<String> msg) { |
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103 if (!cond) |
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104 error(msg.get()); |
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105 } |
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106 |
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107 /** Equivalent to |
97 * assert (o == null) : value; |
108 * assert (o == null) : value; |
98 */ |
109 */ |
99 public static void checkNull(Object o, Object value) { |
110 public static void checkNull(Object o, Object value) { |
100 if (o != null) |
111 if (o != null) |
101 error(String.valueOf(value)); |
112 error(String.valueOf(value)); |
108 if (o != null) |
119 if (o != null) |
109 error(msg); |
120 error(msg); |
110 } |
121 } |
111 |
122 |
112 /** Equivalent to |
123 /** Equivalent to |
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124 * assert (o == null) : msg.get(); |
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125 * Note: message string is computed lazily. |
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126 */ |
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127 public static void checkNull(Object o, Supplier<String> msg) { |
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128 if (o != null) |
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129 error(msg.get()); |
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130 } |
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131 |
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132 /** Equivalent to |
113 * assert (o != null) : msg; |
133 * assert (o != null) : msg; |
114 */ |
134 */ |
115 public static <T> T checkNonNull(T t, String msg) { |
135 public static <T> T checkNonNull(T t, String msg) { |
116 if (t == null) |
136 if (t == null) |
117 error(msg); |
137 error(msg); |
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138 return t; |
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139 } |
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140 |
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141 /** Equivalent to |
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142 * assert (o != null) : msg.get(); |
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143 * Note: message string is computed lazily. |
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144 */ |
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145 public static <T> T checkNonNull(T t, Supplier<String> msg) { |
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146 if (t == null) |
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147 error(msg.get()); |
118 return t; |
148 return t; |
119 } |
149 } |
120 |
150 |
121 /** Equivalent to |
151 /** Equivalent to |
122 * assert false; |
152 * assert false; |