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   /*
    * Copyright (c) 1996, 2006, Oracle and/or its affiliates. All rights reserved.
    * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
    *
    * This code is free software; you can redistribute it and/or modify it
    * under the terms of the GNU General Public License version 2 only, as
    * published by the Free Software Foundation.  Oracle designates this
    * particular file as subject to the "Classpath" exception as provided
    * by Oracle in the LICENSE file that accompanied this code.
   *
   * This code is distributed in the hope that it will be useful, but WITHOUT
   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
   * version 2 for more details (a copy is included in the LICENSE file that
   * accompanied this code).
   *
   * You should have received a copy of the GNU General Public License version
   * 2 along with this work; if not, write to the Free Software Foundation,
   * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
   * or visit www.oracle.com if you need additional information or have any
   * questions.
   */
  
  package java.lang.reflect;
  
  import java.util.Map;
A Field provides information about, and dynamic access to, a single field of a class or an interface. The reflected field may be a class (static) field or an instance field.

A Field permits widening conversions to occur during a get or set access operation, but throws an IllegalArgumentException if a narrowing conversion would occur.

  
  public final
  class Field extends AccessibleObject implements Member {
  
      private Class<?>            clazz;
      private int                 slot;
      // This is guaranteed to be interned by the VM in the 1.4
      // reflection implementation
      private String              name;
      private Class<?>            type;
      private int                 modifiers;
      // Generics and annotations support
      private transient String    signature;
      // generic info repository; lazily initialized
      private transient FieldRepository genericInfo;
      private byte[]              annotations;
      // Cached field accessor created without override
      private FieldAccessor fieldAccessor;
      // Cached field accessor created with override
      private FieldAccessor overrideFieldAccessor;
      // For sharing of FieldAccessors. This branching structure is
      // currently only two levels deep (i.e., one root Field and
      // potentially many Field objects pointing to it.)
      private Field               root;
  
      // Generics infrastructure
  
      private String getGenericSignature() {return ;}
  
      // Accessor for factory
      private GenericsFactory getFactory() {
          Class<?> c = getDeclaringClass();
          // create scope and factory
          return CoreReflectionFactory.make(c, ClassScope.make(c));
      }
  
      // Accessor for generic info repository
      private FieldRepository getGenericInfo() {
          // lazily initialize repository if necessary
          if ( == null) {
              // create and cache generic info repository
               = FieldRepository.make(getGenericSignature(),
                                                 getFactory());
         }
         return //return cached repository
     }


    
Package-private constructor used by ReflectAccess to enable instantiation of these objects in Java code from the java.lang package via sun.reflect.LangReflectAccess.
 
     Field(Class<?> declaringClass,
           String name,
           Class<?> type,
           int modifiers,
           int slot,
           String signature,
           byte[] annotations)
     {
         this. = declaringClass;
         this. = name;
         this. = type;
         this. = modifiers;
         this. = slot;
         this. = signature;
         this. = annotations;
     }

    
Package-private routine (exposed to java.lang.Class via ReflectAccess) which returns a copy of this Field. The copy's "root" field points to this Field.
 
     Field copy() {
         // This routine enables sharing of FieldAccessor objects
         // among Field objects which refer to the same underlying
         // method in the VM. (All of this contortion is only necessary
         // because of the "accessibility" bit in AccessibleObject,
         // which implicitly requires that new java.lang.reflect
         // objects be fabricated for each reflective call on Class
         // objects.)
         Field res = new Field();
         res.root = this;
         // Might as well eagerly propagate this if already present
         res.fieldAccessor = ;
         res.overrideFieldAccessor = ;
         return res;
     }

    
Returns the Class object representing the class or interface that declares the field represented by this Field object.
 
     public Class<?> getDeclaringClass() {
         return ;
     }

    
Returns the name of the field represented by this Field object.
 
     public String getName() {
         return ;
     }

    
Returns the Java language modifiers for the field represented by this Field object, as an integer. The Modifier class should be used to decode the modifiers.

See also:
Modifier
 
     public int getModifiers() {
         return ;
     }

    
Returns true if this field represents an element of an enumerated type; returns false otherwise.

Returns:
true if and only if this field represents an element of an enumerated type.
Since:
1.5
 
     public boolean isEnumConstant() {
         return (getModifiers() & .) != 0;
     }

    
Returns true if this field is a synthetic field; returns false otherwise.

Returns:
true if and only if this field is a synthetic field as defined by the Java Language Specification.
Since:
1.5
 
     public boolean isSynthetic() {
         return Modifier.isSynthetic(getModifiers());
     }

    
Returns a Class object that identifies the declared type for the field represented by this Field object.

Returns:
a Class object identifying the declared type of the field represented by this object
 
     public Class<?> getType() {
         return ;
     }

    
Returns a Type object that represents the declared type for the field represented by this Field object.

If the Type is a parameterized type, the Type object returned must accurately reflect the actual type parameters used in the source code.

If the type of the underlying field is a type variable or a parameterized type, it is created. Otherwise, it is resolved.

Returns:
a Type object that represents the declared type for the field represented by this Field object
Throws:
GenericSignatureFormatError if the generic field signature does not conform to the format specified in The Javaâ„¢ Virtual Machine Specification
java.lang.TypeNotPresentException if the generic type signature of the underlying field refers to a non-existent type declaration
MalformedParameterizedTypeException if the generic signature of the underlying field refers to a parameterized type that cannot be instantiated for any reason
Since:
1.5
 
     public Type getGenericType() {
         if (getGenericSignature() != null)
             return getGenericInfo().getGenericType();
         else
             return getType();
     }


    
Compares this Field against the specified object. Returns true if the objects are the same. Two Field objects are the same if they were declared by the same class and have the same name and type.
 
     public boolean equals(Object obj) {
         if (obj != null && obj instanceof Field) {
             Field other = (Field)obj;
             return (getDeclaringClass() == other.getDeclaringClass())
                 && (getName() == other.getName())
                 && (getType() == other.getType());
         }
         return false;
     }

    
Returns a hashcode for this Field. This is computed as the exclusive-or of the hashcodes for the underlying field's declaring class name and its name.
 
     public int hashCode() {
         return getDeclaringClass().getName().hashCode() ^ getName().hashCode();
     }

    
Returns a string describing this Field. The format is the access modifiers for the field, if any, followed by the field type, followed by a space, followed by the fully-qualified name of the class declaring the field, followed by a period, followed by the name of the field. For example:
    public static final int java.lang.Thread.MIN_PRIORITY
    private int java.io.FileDescriptor.fd
 

The modifiers are placed in canonical order as specified by "The Java Language Specification". This is public, protected or private first, and then other modifiers in the following order: static, final, transient, volatile.

 
     public String toString() {
         int mod = getModifiers();
         return (((mod == 0) ? "" : (Modifier.toString(mod) + " "))
             + getTypeName(getType()) + " "
             + getTypeName(getDeclaringClass()) + "."
             + getName());
     }

    
Returns a string describing this Field, including its generic type. The format is the access modifiers for the field, if any, followed by the generic field type, followed by a space, followed by the fully-qualified name of the class declaring the field, followed by a period, followed by the name of the field.

The modifiers are placed in canonical order as specified by "The Java Language Specification". This is public, protected or private first, and then other modifiers in the following order: static, final, transient, volatile.

Returns:
a string describing this Field, including its generic type
Since:
1.5
 
     public String toGenericString() {
         int mod = getModifiers();
         Type fieldType = getGenericType();
         return (((mod == 0) ? "" : (Modifier.toString(mod) + " "))
             +  ((fieldType instanceof Class) ?
                 getTypeName((Class)fieldType): fieldType.toString())+ " "
             + getTypeName(getDeclaringClass()) + "."
             + getName());
     }

    
Returns the value of the field represented by this Field, on the specified object. The value is automatically wrapped in an object if it has a primitive type.

The underlying field's value is obtained as follows:

If the underlying field is a static field, the obj argument is ignored; it may be null.

Otherwise, the underlying field is an instance field. If the specified obj argument is null, the method throws a NullPointerException. If the specified object is not an instance of the class or interface declaring the underlying field, the method throws an IllegalArgumentException.

If this Field object is enforcing Java language access control, and the underlying field is inaccessible, the method throws an IllegalAccessException. If the underlying field is static, the class that declared the field is initialized if it has not already been initialized.

Otherwise, the value is retrieved from the underlying instance or static field. If the field has a primitive type, the value is wrapped in an object before being returned, otherwise it is returned as is.

If the field is hidden in the type of obj, the field's value is obtained according to the preceding rules.

Parameters:
obj object from which the represented field's value is to be extracted
Returns:
the value of the represented field in object obj; primitive values are wrapped in an appropriate object before being returned
Throws:
java.lang.IllegalAccessException if this Field object is enforcing Java language access control and the underlying field is inaccessible.
java.lang.IllegalArgumentException if the specified object is not an instance of the class or interface declaring the underlying field (or a subclass or implementor thereof).
java.lang.NullPointerException if the specified object is null and the field is an instance field.
java.lang.ExceptionInInitializerError if the initialization provoked by this method fails.
 
     public Object get(Object obj)
     {
         return getFieldAccessor(obj).get(obj);
     }

    
Gets the value of a static or instance boolean field.

Parameters:
obj the object to extract the boolean value from
Returns:
the value of the boolean field
Throws:
java.lang.IllegalAccessException if this Field object is enforcing Java language access control and the underlying field is inaccessible.
java.lang.IllegalArgumentException if the specified object is not an instance of the class or interface declaring the underlying field (or a subclass or implementor thereof), or if the field value cannot be converted to the type boolean by a widening conversion.
java.lang.NullPointerException if the specified object is null and the field is an instance field.
java.lang.ExceptionInInitializerError if the initialization provoked by this method fails.
See also:
get(java.lang.Object)
 
     public boolean getBoolean(Object obj)
     {
         return getFieldAccessor(obj).getBoolean(obj);
     }

    
Gets the value of a static or instance byte field.

Parameters:
obj the object to extract the byte value from
Returns:
the value of the byte field
Throws:
java.lang.IllegalAccessException if this Field object is enforcing Java language access control and the underlying field is inaccessible.
java.lang.IllegalArgumentException if the specified object is not an instance of the class or interface declaring the underlying field (or a subclass or implementor thereof), or if the field value cannot be converted to the type byte by a widening conversion.
java.lang.NullPointerException if the specified object is null and the field is an instance field.
java.lang.ExceptionInInitializerError if the initialization provoked by this method fails.
See also:
get(java.lang.Object)
 
     public byte getByte(Object obj)
     {
         return getFieldAccessor(obj).getByte(obj);
     }

    
Gets the value of a static or instance field of type char or of another primitive type convertible to type char via a widening conversion.

Parameters:
obj the object to extract the char value from
Returns:
the value of the field converted to type char
Throws:
java.lang.IllegalAccessException if this Field object is enforcing Java language access control and the underlying field is inaccessible.
java.lang.IllegalArgumentException if the specified object is not an instance of the class or interface declaring the underlying field (or a subclass or implementor thereof), or if the field value cannot be converted to the type char by a widening conversion.
java.lang.NullPointerException if the specified object is null and the field is an instance field.
java.lang.ExceptionInInitializerError if the initialization provoked by this method fails.
See also:
get(java.lang.Object)
 
     public char getChar(Object obj)
     {
         return getFieldAccessor(obj).getChar(obj);
     }

    
Gets the value of a static or instance field of type short or of another primitive type convertible to type short via a widening conversion.

Parameters:
obj the object to extract the short value from
Returns:
the value of the field converted to type short
Throws:
java.lang.IllegalAccessException if this Field object is enforcing Java language access control and the underlying field is inaccessible.
java.lang.IllegalArgumentException if the specified object is not an instance of the class or interface declaring the underlying field (or a subclass or implementor thereof), or if the field value cannot be converted to the type short by a widening conversion.
java.lang.NullPointerException if the specified object is null and the field is an instance field.
java.lang.ExceptionInInitializerError if the initialization provoked by this method fails.
See also:
get(java.lang.Object)
 
     public short getShort(Object obj)
     {
         return getFieldAccessor(obj).getShort(obj);
     }

    
Gets the value of a static or instance field of type int or of another primitive type convertible to type int via a widening conversion.

Parameters:
obj the object to extract the int value from
Returns:
the value of the field converted to type int
Throws:
java.lang.IllegalAccessException if this Field object is enforcing Java language access control and the underlying field is inaccessible.
java.lang.IllegalArgumentException if the specified object is not an instance of the class or interface declaring the underlying field (or a subclass or implementor thereof), or if the field value cannot be converted to the type int by a widening conversion.
java.lang.NullPointerException if the specified object is null and the field is an instance field.
java.lang.ExceptionInInitializerError if the initialization provoked by this method fails.
See also:
get(java.lang.Object)
 
     public int getInt(Object obj)
     {
         return getFieldAccessor(obj).getInt(obj);
     }

    
Gets the value of a static or instance field of type long or of another primitive type convertible to type long via a widening conversion.

Parameters:
obj the object to extract the long value from
Returns:
the value of the field converted to type long
Throws:
java.lang.IllegalAccessException if this Field object is enforcing Java language access control and the underlying field is inaccessible.
java.lang.IllegalArgumentException if the specified object is not an instance of the class or interface declaring the underlying field (or a subclass or implementor thereof), or if the field value cannot be converted to the type long by a widening conversion.
java.lang.NullPointerException if the specified object is null and the field is an instance field.
java.lang.ExceptionInInitializerError if the initialization provoked by this method fails.
See also:
get(java.lang.Object)
 
     public long getLong(Object obj)
     {
         return getFieldAccessor(obj).getLong(obj);
     }

    
Gets the value of a static or instance field of type float or of another primitive type convertible to type float via a widening conversion.

Parameters:
obj the object to extract the float value from
Returns:
the value of the field converted to type float
Throws:
java.lang.IllegalAccessException if this Field object is enforcing Java language access control and the underlying field is inaccessible.
java.lang.IllegalArgumentException if the specified object is not an instance of the class or interface declaring the underlying field (or a subclass or implementor thereof), or if the field value cannot be converted to the type float by a widening conversion.
java.lang.NullPointerException if the specified object is null and the field is an instance field.
java.lang.ExceptionInInitializerError if the initialization provoked by this method fails.
See also:
get(java.lang.Object)
 
     public float getFloat(Object obj)
     {
         return getFieldAccessor(obj).getFloat(obj);
     }

    
Gets the value of a static or instance field of type double or of another primitive type convertible to type double via a widening conversion.

Parameters:
obj the object to extract the double value from
Returns:
the value of the field converted to type double
Throws:
java.lang.IllegalAccessException if this Field object is enforcing Java language access control and the underlying field is inaccessible.
java.lang.IllegalArgumentException if the specified object is not an instance of the class or interface declaring the underlying field (or a subclass or implementor thereof), or if the field value cannot be converted to the type double by a widening conversion.
java.lang.NullPointerException if the specified object is null and the field is an instance field.
java.lang.ExceptionInInitializerError if the initialization provoked by this method fails.
See also:
get(java.lang.Object)
 
     public double getDouble(Object obj)
     {
         return getFieldAccessor(obj).getDouble(obj);
     }

    
Sets the field represented by this Field object on the specified object argument to the specified new value. The new value is automatically unwrapped if the underlying field has a primitive type.

The operation proceeds as follows:

If the underlying field is static, the obj argument is ignored; it may be null.

Otherwise the underlying field is an instance field. If the specified object argument is null, the method throws a NullPointerException. If the specified object argument is not an instance of the class or interface declaring the underlying field, the method throws an IllegalArgumentException.

If this Field object is enforcing Java language access control, and the underlying field is inaccessible, the method throws an IllegalAccessException.

If the underlying field is final, the method throws an IllegalAccessException unless setAccessible(true) has succeeded for this Field object and the field is non-static. Setting a final field in this way is meaningful only during deserialization or reconstruction of instances of classes with blank final fields, before they are made available for access by other parts of a program. Use in any other context may have unpredictable effects, including cases in which other parts of a program continue to use the original value of this field.

If the underlying field is of a primitive type, an unwrapping conversion is attempted to convert the new value to a value of a primitive type. If this attempt fails, the method throws an IllegalArgumentException.

If, after possible unwrapping, the new value cannot be converted to the type of the underlying field by an identity or widening conversion, the method throws an IllegalArgumentException.

If the underlying field is static, the class that declared the field is initialized if it has not already been initialized.

The field is set to the possibly unwrapped and widened new value.

If the field is hidden in the type of obj, the field's value is set according to the preceding rules.

Parameters:
obj the object whose field should be modified
value the new value for the field of obj being modified
Throws:
java.lang.IllegalAccessException if this Field object is enforcing Java language access control and the underlying field is either inaccessible or final.
java.lang.IllegalArgumentException if the specified object is not an instance of the class or interface declaring the underlying field (or a subclass or implementor thereof), or if an unwrapping conversion fails.
java.lang.NullPointerException if the specified object is null and the field is an instance field.
java.lang.ExceptionInInitializerError if the initialization provoked by this method fails.
 
     public void set(Object objObject value)
     {
         getFieldAccessor(obj).set(objvalue);
     }

    
Sets the value of a field as a boolean on the specified object. This method is equivalent to set(obj, zObj), where zObj is a Boolean object and zObj.booleanValue() == z.

Parameters:
obj the object whose field should be modified
z the new value for the field of obj being modified
Throws:
java.lang.IllegalAccessException if this Field object is enforcing Java language access control and the underlying field is either inaccessible or final.
java.lang.IllegalArgumentException if the specified object is not an instance of the class or interface declaring the underlying field (or a subclass or implementor thereof), or if an unwrapping conversion fails.
java.lang.NullPointerException if the specified object is null and the field is an instance field.
java.lang.ExceptionInInitializerError if the initialization provoked by this method fails.
See also:
set(java.lang.Object,java.lang.Object)
 
     public void setBoolean(Object objboolean z)
     {
         getFieldAccessor(obj).setBoolean(objz);
     }

    
Sets the value of a field as a byte on the specified object. This method is equivalent to set(obj, bObj), where bObj is a Byte object and bObj.byteValue() == b.

Parameters:
obj the object whose field should be modified
b the new value for the field of obj being modified
Throws:
java.lang.IllegalAccessException if this Field object is enforcing Java language access control and the underlying field is either inaccessible or final.
java.lang.IllegalArgumentException if the specified object is not an instance of the class or interface declaring the underlying field (or a subclass or implementor thereof), or if an unwrapping conversion fails.
java.lang.NullPointerException if the specified object is null and the field is an instance field.
java.lang.ExceptionInInitializerError if the initialization provoked by this method fails.
See also:
set(java.lang.Object,java.lang.Object)
 
     public void setByte(Object objbyte b)
     {
         getFieldAccessor(obj).setByte(objb);
     }

    
Sets the value of a field as a char on the specified object. This method is equivalent to set(obj, cObj), where cObj is a Character object and cObj.charValue() == c.

Parameters:
obj the object whose field should be modified
c the new value for the field of obj being modified
Throws:
java.lang.IllegalAccessException if this Field object is enforcing Java language access control and the underlying field is either inaccessible or final.
java.lang.IllegalArgumentException if the specified object is not an instance of the class or interface declaring the underlying field (or a subclass or implementor thereof), or if an unwrapping conversion fails.
java.lang.NullPointerException if the specified object is null and the field is an instance field.
java.lang.ExceptionInInitializerError if the initialization provoked by this method fails.
See also:
set(java.lang.Object,java.lang.Object)
 
     public void setChar(Object objchar c)
     {
         getFieldAccessor(obj).setChar(objc);
     }

    
Sets the value of a field as a short on the specified object. This method is equivalent to set(obj, sObj), where sObj is a Short object and sObj.shortValue() == s.

Parameters:
obj the object whose field should be modified
s the new value for the field of obj being modified
Throws:
java.lang.IllegalAccessException if this Field object is enforcing Java language access control and the underlying field is either inaccessible or final.
java.lang.IllegalArgumentException if the specified object is not an instance of the class or interface declaring the underlying field (or a subclass or implementor thereof), or if an unwrapping conversion fails.
java.lang.NullPointerException if the specified object is null and the field is an instance field.
java.lang.ExceptionInInitializerError if the initialization provoked by this method fails.
See also:
set(java.lang.Object,java.lang.Object)
 
     public void setShort(Object objshort s)
     {
         getFieldAccessor(obj).setShort(objs);
     }

    
Sets the value of a field as an int on the specified object. This method is equivalent to set(obj, iObj), where iObj is a Integer object and iObj.intValue() == i.

Parameters:
obj the object whose field should be modified
i the new value for the field of obj being modified
Throws:
java.lang.IllegalAccessException if this Field object is enforcing Java language access control and the underlying field is either inaccessible or final.
java.lang.IllegalArgumentException if the specified object is not an instance of the class or interface declaring the underlying field (or a subclass or implementor thereof), or if an unwrapping conversion fails.
java.lang.NullPointerException if the specified object is null and the field is an instance field.
java.lang.ExceptionInInitializerError if the initialization provoked by this method fails.
See also:
set(java.lang.Object,java.lang.Object)
 
     public void setInt(Object objint i)
     {
         getFieldAccessor(obj).setInt(obji);
     }

    
Sets the value of a field as a long on the specified object. This method is equivalent to set(obj, lObj), where lObj is a Long object and lObj.longValue() == l.

Parameters:
obj the object whose field should be modified
l the new value for the field of obj being modified
Throws:
java.lang.IllegalAccessException if this Field object is enforcing Java language access control and the underlying field is either inaccessible or final.
java.lang.IllegalArgumentException if the specified object is not an instance of the class or interface declaring the underlying field (or a subclass or implementor thereof), or if an unwrapping conversion fails.
java.lang.NullPointerException if the specified object is null and the field is an instance field.
java.lang.ExceptionInInitializerError if the initialization provoked by this method fails.
See also:
set(java.lang.Object,java.lang.Object)
 
     public void setLong(Object objlong l)
     {
         getFieldAccessor(obj).setLong(objl);
     }

    
Sets the value of a field as a float on the specified object. This method is equivalent to set(obj, fObj), where fObj is a Float object and fObj.floatValue() == f.

Parameters:
obj the object whose field should be modified
f the new value for the field of obj being modified
Throws:
java.lang.IllegalAccessException if this Field object is enforcing Java language access control and the underlying field is either inaccessible or final.
java.lang.IllegalArgumentException if the specified object is not an instance of the class or interface declaring the underlying field (or a subclass or implementor thereof), or if an unwrapping conversion fails.
java.lang.NullPointerException if the specified object is null and the field is an instance field.
java.lang.ExceptionInInitializerError if the initialization provoked by this method fails.
See also:
set(java.lang.Object,java.lang.Object)
 
     public void setFloat(Object objfloat f)
     {
         getFieldAccessor(obj).setFloat(objf);
     }

    
Sets the value of a field as a double on the specified object. This method is equivalent to set(obj, dObj), where dObj is a Double object and dObj.doubleValue() == d.

Parameters:
obj the object whose field should be modified
d the new value for the field of obj being modified
Throws:
java.lang.IllegalAccessException if this Field object is enforcing Java language access control and the underlying field is either inaccessible or final.
java.lang.IllegalArgumentException if the specified object is not an instance of the class or interface declaring the underlying field (or a subclass or implementor thereof), or if an unwrapping conversion fails.
java.lang.NullPointerException if the specified object is null and the field is an instance field.
java.lang.ExceptionInInitializerError if the initialization provoked by this method fails.
See also:
set(java.lang.Object,java.lang.Object)
 
     public void setDouble(Object objdouble d)
     {
         getFieldAccessor(obj).setDouble(objd);
     }
 
     // Convenience routine which performs security checks
     private FieldAccessor getFieldAccessor(Object obj)
         throws IllegalAccessException
     {
         doSecurityCheck(obj);
         boolean ov = ;
         FieldAccessor a = (ov)?  : ;
         return (a != null)? a : acquireFieldAccessor(ov);
     }
 
     // NOTE that there is no synchronization used here. It is correct
     // (though not efficient) to generate more than one FieldAccessor
     // for a given Field. However, avoiding synchronization will
     // probably make the implementation more scalable.
     private FieldAccessor acquireFieldAccessor(boolean overrideFinalCheck) {
         // First check to see if one has been created yet, and take it
         // if so
         FieldAccessor tmp = null;
         if ( != nulltmp = .getFieldAccessor(overrideFinalCheck);
         if (tmp != null) {
             if (overrideFinalCheck)
                  = tmp;
             else
                  = tmp;
         } else {
             // Otherwise fabricate one and propagate it up to the root
             tmp = .newFieldAccessor(thisoverrideFinalCheck);
             setFieldAccessor(tmpoverrideFinalCheck);
         }
 
         return tmp;
     }
 
     // Returns FieldAccessor for this Field object, not looking up
     // the chain to the root
     private FieldAccessor getFieldAccessor(boolean overrideFinalCheck) {
         return (overrideFinalCheck)?  : ;
     }
 
     // Sets the FieldAccessor for this Field object and
     // (recursively) its root
     private void setFieldAccessor(FieldAccessor accessorboolean overrideFinalCheck) {
         if (overrideFinalCheck)
              = accessor;
         else
              = accessor;
         // Propagate up
         if ( != null) {
             .setFieldAccessor(accessoroverrideFinalCheck);
         }
     }
 
     // NOTE: be very careful if you change the stack depth of this
     // routine. The depth of the "getCallerClass" call is hardwired so
     // that the compiler can have an easier time if this gets inlined.
     private void doSecurityCheck(Object objthrows IllegalAccessException {
         if (!) {
             if (!Reflection.quickCheckMemberAccess()) {
                 Class<?> caller = Reflection.getCallerClass(4);
 
                 checkAccess(callerobj);
             }
         }
     }
 
     /*
      * Utility routine to paper over array type names
      */
     static String getTypeName(Class<?> type) {
         if (type.isArray()) {
             try {
                 Class<?> cl = type;
                 int dimensions = 0;
                 while (cl.isArray()) {
                     dimensions++;
                     cl = cl.getComponentType();
                 }
                StringBuffer sb = new StringBuffer();
                sb.append(cl.getName());
                for (int i = 0; i < dimensionsi++) {
                    sb.append("[]");
                }
                return sb.toString();
            } catch (Throwable e) { /*FALLTHRU*/ }
        }
        return type.getName();
    }

    
    public <T extends Annotation> T getAnnotation(Class<T> annotationClass) {
        if (annotationClass == null)
            throw new NullPointerException();
        return (T) declaredAnnotations().get(annotationClass);
    }

    

Since:
1.5
    public Annotation[] getDeclaredAnnotations()  {
        return AnnotationParser.toArray(declaredAnnotations());
    }
    private transient Map<Class<? extends Annotation>, AnnotationdeclaredAnnotations;
    private synchronized  Map<Class<? extends Annotation>, AnnotationdeclaredAnnotations() {
        if ( == null) {
             = AnnotationParser.parseAnnotations(
                , sun.misc.SharedSecrets.getJavaLangAccess().
                getConstantPool(getDeclaringClass()),
                getDeclaringClass());
        }
        return ;
    }
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