| 1 | package net.sourceforge.retroweaver.runtime.java.lang; |
| 2 | |
| 3 | import java.lang.reflect.Constructor; |
| 4 | import java.lang.reflect.Method; |
| 5 | |
| 6 | import net.sourceforge.retroweaver.runtime.java.lang.annotation.AIB; |
| 7 | import net.sourceforge.retroweaver.runtime.java.lang.annotation.Annotation; |
| 8 | import net.sourceforge.retroweaver.runtime.java.lang.reflect.GenericSignatureFormatError; |
| 9 | import net.sourceforge.retroweaver.runtime.java.lang.reflect.MalformedParameterizedTypeException; |
| 10 | import net.sourceforge.retroweaver.runtime.java.lang.reflect.ReflectionDescriptor; |
| 11 | import net.sourceforge.retroweaver.runtime.java.lang.reflect.Type; |
| 12 | import net.sourceforge.retroweaver.runtime.java.lang.reflect.TypeVariable; |
| 13 | |
| 14 | /** |
| 15 | * Replacements for methods added to java.lang.Class in Java 1.5. |
| 16 | */ |
| 17 | public final class Class_ { |
| 18 | |
| 19 | private Class_() { |
| 20 | // private constructor |
| 21 | } |
| 22 | |
| 23 | public static boolean isAnnotation( Class c ) { |
| 24 | return Annotation.class.isAssignableFrom(c); |
| 25 | } |
| 26 | |
| 27 | /** |
| 28 | * Returns this element's annotation for the specified type if such an annotation is present, else null. |
| 29 | * |
| 30 | */ |
| 31 | public static <T extends Annotation> T getAnnotation( Class c, Class<T> annotationType ) { |
| 32 | if ( annotationType == null ) { |
| 33 | throw new NullPointerException( "Null annotationType" ); |
| 34 | } |
| 35 | |
| 36 | return AIB.getAib(c).getClassAnnotation(annotationType); |
| 37 | } |
| 38 | |
| 39 | /** |
| 40 | * Returns all annotations present on this element. |
| 41 | */ |
| 42 | public static Annotation[] getAnnotations( Class c ) { |
| 43 | return AIB.getAib(c).getClassAnnotations(); |
| 44 | } |
| 45 | |
| 46 | /** |
| 47 | * Returns all annotations that are directly present on this element. |
| 48 | */ |
| 49 | public static Annotation[] getDeclaredAnnotations( Class c ) { |
| 50 | return AIB.getAib(c).getDeclaredClassAnnotations(); |
| 51 | } |
| 52 | |
| 53 | /** |
| 54 | * Returns true if an annotation for the specified type is present on this element, else false. |
| 55 | */ |
| 56 | public static boolean isAnnotationPresent( Class c, Class<? extends Annotation> annotationType ) { |
| 57 | return getAnnotation( c, annotationType ) != null; |
| 58 | } |
| 59 | |
| 60 | /** |
| 61 | * Replacement for Class.asSubclass(Class). |
| 62 | * |
| 63 | * @param c a Class |
| 64 | * @param superclass another Class which must be a superclass of <i>c</i> |
| 65 | * @return <i>c</i> |
| 66 | * @throws java.lang.ClassCastException if <i>c</i> is |
| 67 | */ |
| 68 | public static Class asSubclass(Class<?> c, Class<?> superclass) { |
| 69 | if (!superclass.isAssignableFrom(c)) { |
| 70 | throw new ClassCastException(superclass.getName()); |
| 71 | } |
| 72 | return c; |
| 73 | } |
| 74 | |
| 75 | /** |
| 76 | * Replacement for Class.cast(Object). Throws a ClassCastException if <i>obj</i> |
| 77 | * is not an instance of class <var>c</var>, or a subtype of <var>c</var>. |
| 78 | * |
| 79 | * @param c Class we want to cast <var>obj</var> to |
| 80 | * @param object object we want to cast |
| 81 | * @return The object, or <code>null</code> if the object is |
| 82 | * <code>null</code>. |
| 83 | * @throws java.lang.ClassCastException if <var>obj</var> is not |
| 84 | * <code>null</code> or an instance of <var>c</var> |
| 85 | */ |
| 86 | public static Object cast(Class c, Object object) { |
| 87 | if (object == null || c.isInstance(object)) { |
| 88 | return object; |
| 89 | } else { |
| 90 | throw new ClassCastException(c.getName()); |
| 91 | } |
| 92 | } |
| 93 | |
| 94 | /** |
| 95 | * Replacement for Class.isEnum(). |
| 96 | * |
| 97 | * @param class_ class we want to test. |
| 98 | * @return true if the class was declared as an Enum. |
| 99 | */ |
| 100 | public static <T> boolean isEnum(Class<T> class_) { |
| 101 | Class c = class_.getSuperclass(); |
| 102 | |
| 103 | if (c == null) { |
| 104 | return false; |
| 105 | } |
| 106 | |
| 107 | return Enum.class.isAssignableFrom(c); |
| 108 | } |
| 109 | |
| 110 | /** |
| 111 | * Replacement for Class.getEnumConstants(). |
| 112 | * |
| 113 | * @param class_ class we want to get Enum constants for. |
| 114 | * @return The elements of this enum class or null if this does not represent an enum type. |
| 115 | */ |
| 116 | public static <T> T[] getEnumConstants(Class<T> class_) { |
| 117 | if (!isEnum(class_)) { |
| 118 | return null; |
| 119 | } |
| 120 | |
| 121 | return Enum.getEnumValues(class_).clone(); |
| 122 | } |
| 123 | |
| 124 | /** |
| 125 | * replacement for Class.isAnonymousClass() |
| 126 | */ |
| 127 | public static boolean isAnonymousClass(Class class_) { |
| 128 | return getSimpleName(class_).length() == 0; |
| 129 | } |
| 130 | |
| 131 | /** |
| 132 | * replacement for Class.getSimpleName() |
| 133 | */ |
| 134 | public static String getSimpleName(Class class_) { |
| 135 | if (class_.isArray()) { |
| 136 | return getSimpleName(class_.getComponentType()) + "[]"; |
| 137 | } |
| 138 | |
| 139 | String className = class_.getName(); |
| 140 | |
| 141 | int i = className.lastIndexOf('$'); |
| 142 | if (i != -1) { |
| 143 | do { |
| 144 | i++; |
| 145 | } while (i < className.length() && Character.isDigit(className.charAt(i))); |
| 146 | return className.substring(i); |
| 147 | } |
| 148 | |
| 149 | return className.substring(className.lastIndexOf('.') + 1); |
| 150 | } |
| 151 | |
| 152 | /** |
| 153 | * replacement for Class.isSynthetic() |
| 154 | */ |
| 155 | public static boolean isSynthetic(Class class_) { |
| 156 | throw new UnsupportedOperationException("NotImplemented"); |
| 157 | } |
| 158 | |
| 159 | public static TypeVariable[] getTypeParameters(Class class_) |
| 160 | throws GenericSignatureFormatError { |
| 161 | return ReflectionDescriptor.getReflectionDescriptor(class_).getTypeParameters(); |
| 162 | } |
| 163 | |
| 164 | public static Type getGenericSuperclass(Class class_) |
| 165 | throws GenericSignatureFormatError, TypeNotPresentException, |
| 166 | MalformedParameterizedTypeException |
| 167 | { |
| 168 | return ReflectionDescriptor.getReflectionDescriptor(class_).getGenericSuperclass(); |
| 169 | } |
| 170 | |
| 171 | public static Type[] getGenericInterfaces(Class class_) throws GenericSignatureFormatError, |
| 172 | TypeNotPresentException, MalformedParameterizedTypeException |
| 173 | { |
| 174 | return ReflectionDescriptor.getReflectionDescriptor(class_).getGenericInterfaces(); |
| 175 | } |
| 176 | |
| 177 | public static Method getEnclosingMethod(Class class_) { |
| 178 | return ReflectionDescriptor.getReflectionDescriptor(class_).getEnclosingMethod(); |
| 179 | } |
| 180 | |
| 181 | public static Constructor<?> getEnclosingConstructor(Class class_) { |
| 182 | return ReflectionDescriptor.getReflectionDescriptor(class_).getEnclosingConstructor(); |
| 183 | } |
| 184 | |
| 185 | public static Class<?> getEnclosingClass(Class class_) { |
| 186 | return ReflectionDescriptor.getReflectionDescriptor(class_).getEnclosingClass(); |
| 187 | } |
| 188 | |
| 189 | public static String getCanonicalName(Class class_) { |
| 190 | if (class_.isArray()) { |
| 191 | Class component = class_.getComponentType(); |
| 192 | String s = getCanonicalName(component); |
| 193 | return s == null ? null : s + "[]"; |
| 194 | } |
| 195 | |
| 196 | if (isLocalClass(class_) || isAnonymousClass(class_)) { |
| 197 | return null; |
| 198 | } |
| 199 | |
| 200 | return class_.getName().replace('$', '.'); |
| 201 | } |
| 202 | |
| 203 | public static boolean isLocalClass(Class class_) { |
| 204 | return getEnclosingMethod(class_) != null && !isAnonymousClass(class_); |
| 205 | } |
| 206 | |
| 207 | public static boolean isMemberClass(Class class_) { |
| 208 | if (getEnclosingClass(class_) != null) { |
| 209 | return !(isLocalClass(class_) || isAnonymousClass(class_)); |
| 210 | } |
| 211 | return false; |
| 212 | } |
| 213 | |
| 214 | } |