/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* 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.
*/
/**
* {@code Constructor} provides information about, and access to, a single
* constructor for a class.
*
* <p>{@code Constructor} permits widening conversions to occur when matching the
* actual parameters to newInstance() with the underlying
* constructor's formal parameters, but throws an
* {@code IllegalArgumentException} if a narrowing conversion would occur.
*
* @param <T> the class in which the constructor is declared
*
* @see Member
* @see java.lang.Class
* @see java.lang.Class#getConstructors()
* @see java.lang.Class#getConstructor(Class[])
* @see java.lang.Class#getDeclaredConstructors()
*
* @author Kenneth Russell
* @author Nakul Saraiya
*/
public final
Member {
private int slot;
private int modifiers;
// Generics and annotations support
// generic info repository; lazily initialized
private byte[] annotations;
private byte[] parameterAnnotations;
// Generics infrastructure
// Accessor for factory
// create scope and factory
}
// Accessor for generic info repository
// lazily initialize repository if necessary
if (genericInfo == null) {
// create and cache generic info repository
getFactory());
}
return genericInfo; //return cached repository
}
// For sharing of ConstructorAccessors. This branching structure
// is currently only two levels deep (i.e., one root Constructor
// and potentially many Constructor objects pointing to it.)
/**
* Package-private constructor used by ReflectAccess to enable
* instantiation of these objects in Java code from the java.lang
* package via sun.reflect.LangReflectAccess.
*/
Class<?>[] parameterTypes,
Class<?>[] checkedExceptions,
int modifiers,
int slot,
byte[] annotations,
byte[] parameterAnnotations)
{
this.clazz = declaringClass;
this.parameterTypes = parameterTypes;
this.exceptionTypes = checkedExceptions;
this.annotations = annotations;
}
/**
* Package-private routine (exposed to java.lang.Class via
* ReflectAccess) which returns a copy of this Constructor. The copy's
* "root" field points to this Constructor.
*/
// This routine enables sharing of ConstructorAccessor objects
// among Constructor 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.)
// Might as well eagerly propagate this if already present
return res;
}
/**
* Returns the {@code Class} object representing the class that declares
* the constructor represented by this {@code Constructor} object.
*/
return clazz;
}
/**
* Returns the name of this constructor, as a string. This is
* the binary name of the constructor's declaring class.
*/
return getDeclaringClass().getName();
}
/**
* Returns the Java language modifiers for the constructor
* represented by this {@code Constructor} object, as an integer. The
* {@code Modifier} class should be used to decode the modifiers.
*
* @see Modifier
*/
public int getModifiers() {
return modifiers;
}
/**
* Returns an array of {@code TypeVariable} objects that represent the
* type variables declared by the generic declaration represented by this
* {@code GenericDeclaration} object, in declaration order. Returns an
* array of length 0 if the underlying generic declaration declares no type
* variables.
*
* @return an array of {@code TypeVariable} objects that represent
* the type variables declared by this generic declaration
* @throws GenericSignatureFormatError if the generic
* signature of this generic declaration does not conform to
* the format specified in
* <cite>The Java™ Virtual Machine Specification</cite>
* @since 1.5
*/
if (getSignature() != null) {
} else
}
/**
* Returns an array of {@code Class} objects that represent the formal
* parameter types, in declaration order, of the constructor
* represented by this {@code Constructor} object. Returns an array of
* length 0 if the underlying constructor takes no parameters.
*
* @return the parameter types for the constructor this object
* represents
*/
}
/**
* Returns an array of {@code Type} objects that represent the formal
* parameter types, in declaration order, of the method represented by
* this {@code Constructor} object. Returns an array of length 0 if the
* underlying method takes no parameters.
*
* <p>If a formal parameter type is a parameterized type,
* the {@code Type} object returned for it must accurately reflect
* the actual type parameters used in the source code.
*
* <p>If a formal parameter type is a type variable or a parameterized
* type, it is created. Otherwise, it is resolved.
*
* @return an array of {@code Type}s that represent the formal
* parameter types of the underlying method, in declaration order
* @throws GenericSignatureFormatError
* if the generic method signature does not conform to the format
* specified in
* <cite>The Java™ Virtual Machine Specification</cite>
* @throws TypeNotPresentException if any of the parameter
* types of the underlying method refers to a non-existent type
* declaration
* @throws MalformedParameterizedTypeException if any of
* the underlying method's parameter types refer to a parameterized
* type that cannot be instantiated for any reason
* @since 1.5
*/
if (getSignature() != null)
return getGenericInfo().getParameterTypes();
else
return getParameterTypes();
}
/**
* Returns an array of {@code Class} objects that represent the types
* of exceptions declared to be thrown by the underlying constructor
* represented by this {@code Constructor} object. Returns an array of
* length 0 if the constructor declares no exceptions in its {@code throws} clause.
*
* @return the exception types declared as being thrown by the
* constructor this object represents
*/
}
/**
* Returns an array of {@code Type} objects that represent the
* exceptions declared to be thrown by this {@code Constructor} object.
* Returns an array of length 0 if the underlying method declares
* no exceptions in its {@code throws} clause.
*
* <p>If an exception type is a type variable or a parameterized
* type, it is created. Otherwise, it is resolved.
*
* @return an array of Types that represent the exception types
* thrown by the underlying method
* @throws GenericSignatureFormatError
* if the generic method signature does not conform to the format
* specified in
* <cite>The Java™ Virtual Machine Specification</cite>
* @throws TypeNotPresentException if the underlying method's
* {@code throws} clause refers to a non-existent type declaration
* @throws MalformedParameterizedTypeException if
* the underlying method's {@code throws} clause refers to a
* parameterized type that cannot be instantiated for any reason
* @since 1.5
*/
if (getSignature() != null &&
return result;
else
return getExceptionTypes();
}
/**
* Compares this {@code Constructor} against the specified object.
* Returns true if the objects are the same. Two {@code Constructor} objects are
* the same if they were declared by the same class and have the
* same formal parameter types.
*/
/* Avoid unnecessary cloning */
return false;
}
return true;
}
}
}
return false;
}
/**
* Returns a hashcode for this {@code Constructor}. The hashcode is
* the same as the hashcode for the underlying constructor's
* declaring class name.
*/
public int hashCode() {
}
/**
* Returns a string describing this {@code Constructor}. The string is
* formatted as the constructor access modifiers, if any,
* followed by the fully-qualified name of the declaring class,
* followed by a parenthesized, comma-separated list of the
* constructor's formal parameter types. For example:
* <pre>
* public java.util.Hashtable(int,float)
* </pre>
*
* <p>The only possible modifiers for constructors are the access
* modifiers {@code public}, {@code protected} or
* {@code private}. Only one of these may appear, or none if the
* constructor has default (package) access.
*/
try {
if (mod != 0) {
}
}
}
}
} catch (Exception e) {
return "<" + e + ">";
}
}
/**
* Returns a string describing this {@code Constructor},
* including type parameters. The string is formatted as the
* constructor access modifiers, if any, followed by an
* angle-bracketed comma separated list of the constructor's type
* parameters, if any, followed by the fully-qualified name of the
* declaring class, followed by a parenthesized, comma-separated
* list of the constructor's generic formal parameter types.
*
* If this constructor was declared to take a variable number of
* arguments, instead of denoting the last parameter as
* "<tt><i>Type</i>[]</tt>", it is denoted as
* "<tt><i>Type</i>...</tt>".
*
* A space is used to separate access modifiers from one another
* and from the type parameters or return type. If there are no
* type parameters, the type parameter list is elided; if the type
* parameter list is present, a space separates the list from the
* class name. If the constructor is declared to throw
* exceptions, the parameter list is followed by a space, followed
* by the word "{@code throws}" followed by a
* comma-separated list of the thrown exception types.
*
* <p>The only possible modifiers for constructors are the access
* modifiers {@code public}, {@code protected} or
* {@code private}. Only one of these may appear, or none if the
* constructor has default (package) access.
*
* @return a string describing this {@code Constructor},
* include type parameters
*
* @since 1.5
*/
try {
if (mod != 0) {
}
boolean first = true;
if (!first)
// Class objects can't occur here; no need to test
// and call Class.getName().
first = false;
}
}
}
exceptions[k].toString());
}
}
} catch (Exception e) {
return "<" + e + ">";
}
}
/**
* Uses the constructor represented by this {@code Constructor} object to
* create and initialize a new instance of the constructor's
* declaring class, with the specified initialization parameters.
* Individual parameters are automatically unwrapped to match
* primitive formal parameters, and both primitive and reference
* parameters are subject to method invocation conversions as necessary.
*
* <p>If the number of formal parameters required by the underlying constructor
* is 0, the supplied {@code initargs} array may be of length 0 or null.
*
* <p>If the constructor's declaring class is an inner class in a
* non-static context, the first argument to the constructor needs
* to be the enclosing instance; see section 15.9.3 of
* <cite>The Java™ Language Specification</cite>.
*
* <p>If the required access and argument checks succeed and the
* instantiation will proceed, the constructor's declaring class
* is initialized if it has not already been initialized.
*
* <p>If the constructor completes normally, returns the newly
* created and initialized instance.
*
* @param initargs array of objects to be passed as arguments to
* the constructor call; values of primitive types are wrapped in
* a wrapper object of the appropriate type (e.g. a {@code float}
* in a {@link java.lang.Float Float})
*
* @return a new object created by calling the constructor
* this object represents
*
* @exception IllegalAccessException if this {@code Constructor} object
* is enforcing Java language access control and the underlying
* constructor is inaccessible.
* @exception IllegalArgumentException if the number of actual
* and formal parameters differ; if an unwrapping
* conversion for primitive arguments fails; or if,
* after possible unwrapping, a parameter value
* cannot be converted to the corresponding formal
* parameter type by a method invocation conversion; if
* this constructor pertains to an enum type.
* @exception InstantiationException if the class that declares the
* underlying constructor represents an abstract class.
* @exception InvocationTargetException if the underlying constructor
* throws an exception.
* @exception ExceptionInInitializerError if the initialization provoked
* by this method fails.
*/
{
if (!override) {
}
}
throw new IllegalArgumentException("Cannot reflectively create enum objects");
}
}
/**
* Returns {@code true} if this constructor was declared to take
* a variable number of arguments; returns {@code false}
* otherwise.
*
* @return {@code true} if an only if this constructor was declared to
* take a variable number of arguments.
* @since 1.5
*/
public boolean isVarArgs() {
}
/**
* Returns {@code true} if this constructor is a synthetic
* constructor; returns {@code false} otherwise.
*
* @return true if and only if this constructor is a synthetic
* constructor as defined by
* <cite>The Java™ Language Specification</cite>.
* @since 1.5
*/
public boolean isSynthetic() {
}
// NOTE that there is no synchronization used here. It is correct
// (though not efficient) to generate more than one
// ConstructorAccessor for a given Constructor. However, avoiding
// synchronization will probably make the implementation more
// scalable.
// First check to see if one has been created yet, and take it
// if so.
} else {
// Otherwise fabricate one and propagate it up to the root
}
return tmp;
}
// Returns ConstructorAccessor for this Constructor object, not
// looking up the chain to the root
return constructorAccessor;
}
// Sets the ConstructorAccessor for this Constructor object and
// (recursively) its root
// Propagate up
}
}
int getSlot() {
return slot;
}
return signature;
}
byte[] getRawAnnotations() {
return annotations;
}
byte[] getRawParameterAnnotations() {
return parameterAnnotations;
}
/**
* @throws NullPointerException {@inheritDoc}
* @since 1.5
*/
if (annotationClass == null)
throw new NullPointerException();
}
/**
* @since 1.5
*/
}
if (declaredAnnotations == null) {
}
return declaredAnnotations;
}
/**
* Returns an array of arrays that represent the annotations on the formal
* parameters, in declaration order, of the method represented by
* this {@code Constructor} object. (Returns an array of length zero if the
* underlying method is parameterless. If the method has one or more
* parameters, a nested array of length zero is returned for each parameter
* with no annotations.) The annotation objects contained in the returned
* arrays are serializable. The caller of this method is free to modify
* the returned arrays; it will have no effect on the arrays returned to
* other callers.
*
* @return an array of arrays that represent the annotations on the formal
* parameters, in declaration order, of the method represented by this
* Constructor object
* @since 1.5
*/
if (parameterAnnotations == null)
if (declaringClass.isEnum() ||
; // Can't do reliable parameter counting
else {
// Check for the enclosing instance parameter for
// non-static member classes
(declaringClass.isMemberClass() &&
throw new AnnotationFormatError(
"Parameter annotations don't match number of parameters");
}
}
}
return result;
}
}