--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/java/lang/reflect/Executable.java Tue Jul 19 17:45:11 2011 -0700
@@ -0,0 +1,394 @@
+/*
+ * Copyright (c) 2011, 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.lang.annotation.*;
+import java.util.Map;
+import sun.reflect.annotation.AnnotationParser;
+import sun.reflect.generics.repository.ConstructorRepository;
+import sun.reflect.generics.factory.CoreReflectionFactory;
+import sun.reflect.generics.factory.GenericsFactory;
+import sun.reflect.generics.scope.ConstructorScope;
+
+/**
+ * A shared superclass for the common functionality of {@link Method}
+ * and {@link Constructor}.
+ *
+ * @since 1.8
+ */
+public abstract class Executable extends AccessibleObject
+ implements Member, GenericDeclaration {
+ /*
+ * Only grant package-visibility to the constructor.
+ */
+ Executable() {}
+
+ /**
+ * Accessor method to allow code sharing
+ */
+ abstract byte[] getAnnotationBytes();
+
+ /**
+ * Does the Executable have generic information.
+ */
+ abstract boolean hasGenericInformation();
+
+ abstract ConstructorRepository getGenericInfo();
+
+ boolean equalParamTypes(Class<?>[] params1, Class<?>[] params2) {
+ /* Avoid unnecessary cloning */
+ if (params1.length == params2.length) {
+ for (int i = 0; i < params1.length; i++) {
+ if (params1[i] != params2[i])
+ return false;
+ }
+ }
+ return true;
+ }
+
+ Annotation[][] parseParameterAnnotations(byte[] parameterAnnotations) {
+ return AnnotationParser.parseParameterAnnotations(
+ parameterAnnotations,
+ sun.misc.SharedSecrets.getJavaLangAccess().
+ getConstantPool(getDeclaringClass()),
+ getDeclaringClass());
+ }
+
+ void separateWithCommas(Class<?>[] types, StringBuilder sb) {
+ for (int j = 0; j < types.length; j++) {
+ sb.append(Field.getTypeName(types[j]));
+ if (j < (types.length - 1))
+ sb.append(",");
+ }
+
+ }
+
+ void printModifiersIfNonzero(StringBuilder sb, int mask) {
+ int mod = getModifiers() & mask;
+ if (mod != 0) {
+ sb.append(Modifier.toString(mod)).append(' ');
+ }
+ }
+
+ String sharedToString(int modifierMask,
+ Class<?>[] parameterTypes,
+ Class<?>[] exceptionTypes) {
+ try {
+ StringBuilder sb = new StringBuilder();
+
+ printModifiersIfNonzero(sb, modifierMask);
+ specificToStringHeader(sb);
+
+ sb.append('(');
+ separateWithCommas(parameterTypes, sb);
+ sb.append(')');
+ if (exceptionTypes.length > 0) {
+ sb.append(" throws ");
+ separateWithCommas(exceptionTypes, sb);
+ }
+ return sb.toString();
+ } catch (Exception e) {
+ return "<" + e + ">";
+ }
+ }
+
+ /**
+ * Generate toString header information specific to a method or
+ * constructor.
+ */
+ abstract void specificToStringHeader(StringBuilder sb);
+
+ String sharedToGenericString(int modifierMask) {
+ try {
+ StringBuilder sb = new StringBuilder();
+
+ printModifiersIfNonzero(sb, modifierMask);
+
+ TypeVariable<?>[] typeparms = getTypeParameters();
+ if (typeparms.length > 0) {
+ boolean first = true;
+ sb.append('<');
+ for(TypeVariable<?> typeparm: typeparms) {
+ if (!first)
+ sb.append(',');
+ // Class objects can't occur here; no need to test
+ // and call Class.getName().
+ sb.append(typeparm.toString());
+ first = false;
+ }
+ sb.append("> ");
+ }
+
+ specificToGenericStringHeader(sb);
+
+ sb.append('(');
+ Type[] params = getGenericParameterTypes();
+ for (int j = 0; j < params.length; j++) {
+ String param = (params[j] instanceof Class)?
+ Field.getTypeName((Class)params[j]):
+ (params[j].toString());
+ if (isVarArgs() && (j == params.length - 1)) // replace T[] with T...
+ param = param.replaceFirst("\\[\\]$", "...");
+ sb.append(param);
+ if (j < (params.length - 1))
+ sb.append(',');
+ }
+ sb.append(')');
+ Type[] exceptions = getGenericExceptionTypes();
+ if (exceptions.length > 0) {
+ sb.append(" throws ");
+ for (int k = 0; k < exceptions.length; k++) {
+ sb.append((exceptions[k] instanceof Class)?
+ ((Class)exceptions[k]).getName():
+ exceptions[k].toString());
+ if (k < (exceptions.length - 1))
+ sb.append(',');
+ }
+ }
+ return sb.toString();
+ } catch (Exception e) {
+ return "<" + e + ">";
+ }
+ }
+
+ /**
+ * Generate toGenericString header information specific to a
+ * method or constructor.
+ */
+ abstract void specificToGenericStringHeader(StringBuilder sb);
+
+ /**
+ * Returns the {@code Class} object representing the class or interface
+ * that declares the method represented by this executable object.
+ */
+ public abstract Class<?> getDeclaringClass();
+
+ /**
+ * Returns the name of the executable represented by this object.
+ */
+ public abstract String getName();
+
+ /**
+ * Returns the Java language {@linkplain Modifier modifiers} for
+ * the executable represented by this object.
+ */
+ public abstract int getModifiers();
+
+ /**
+ * 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>
+ */
+ public abstract TypeVariable<?>[] getTypeParameters();
+
+ /**
+ * Returns an array of {@code Class} objects that represent the formal
+ * parameter types, in declaration order, of the executable
+ * represented by this object. Returns an array of length
+ * 0 if the underlying method takes no parameters.
+ *
+ * @return the parameter types for the method this object
+ * represents
+ */
+ public abstract Class<?>[] getParameterTypes();
+
+ /**
+ * Returns an array of {@code Type} objects that represent the formal
+ * parameter types, in declaration order, of the method represented by
+ * this executable 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
+ */
+ public Type[] getGenericParameterTypes() {
+ if (hasGenericInformation())
+ 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
+ * executable represented by this object. Returns an array of
+ * length 0 if the executable declares no exceptions in its {@code
+ * throws} clause.
+ *
+ * @return the exception types declared as being thrown by the
+ * executable this object represents
+ */
+ public abstract Class<?>[] getExceptionTypes();
+
+ /**
+ * Returns an array of {@code Type} objects that represent the
+ * exceptions declared to be thrown by this executable object.
+ * Returns an array of length 0 if the underlying executable 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
+ */
+ public Type[] getGenericExceptionTypes() {
+ Type[] result;
+ if (hasGenericInformation() &&
+ ((result = getGenericInfo().getExceptionTypes()).length > 0))
+ return result;
+ else
+ return getExceptionTypes();
+ }
+
+ /**
+ * Returns a string describing this {@code Executable}, including
+ * any type parameters.
+ */
+ public abstract String toGenericString();
+
+ /**
+ * Returns {@code true} if this executable was declared to take a
+ * variable number of arguments; returns {@code false} otherwise.
+ *
+ * @return {@code true} if an only if this executable was declared
+ * to take a variable number of arguments.
+ */
+ public boolean isVarArgs() {
+ return (getModifiers() & Modifier.VARARGS) != 0;
+ }
+
+ /**
+ * Returns {@code true} if this executable is a synthetic
+ * construct; returns {@code false} otherwise.
+ *
+ * @return true if and only if this executable is a synthetic
+ * construct as defined by
+ * <cite>The Java™ Language Specification</cite>.
+ */
+ public boolean isSynthetic() {
+ return Modifier.isSynthetic(getModifiers());
+ }
+
+ /**
+ * Returns an array of arrays that represent the annotations on
+ * the formal parameters, in declaration order, of the executable
+ * represented by this object. (Returns an array of length zero if
+ * the underlying method is parameterless. If the executable 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 exectuable represented by this
+ * object
+ */
+ public abstract Annotation[][] getParameterAnnotations();
+
+ Annotation[][] sharedGetParameterAnnotations(Class<?>[] parameterTypes,
+ byte[] parameterAnnotations) {
+ int numParameters = parameterTypes.length;
+ if (parameterAnnotations == null)
+ return new Annotation[numParameters][0];
+
+ Annotation[][] result = parseParameterAnnotations(parameterAnnotations);
+
+ if (result.length != numParameters)
+ handleParameterNumberMismatch(result.length, numParameters);
+ return result;
+ }
+
+ abstract void handleParameterNumberMismatch(int resultLength, int numParameters);
+
+ /**
+ * {@inheritDoc}
+ * @throws NullPointerException {@inheritDoc}
+ */
+ public <T extends Annotation> T getAnnotation(Class<T> annotationClass) {
+ if (annotationClass == null)
+ throw new NullPointerException();
+
+ return (T) declaredAnnotations().get(annotationClass);
+ }
+
+ /**
+ * {@inheritDoc}
+ */
+ public Annotation[] getDeclaredAnnotations() {
+ return AnnotationParser.toArray(declaredAnnotations());
+ }
+
+ private transient Map<Class<? extends Annotation>, Annotation> declaredAnnotations;
+
+ private synchronized Map<Class<? extends Annotation>, Annotation> declaredAnnotations() {
+ if (declaredAnnotations == null) {
+ declaredAnnotations = AnnotationParser.parseAnnotations(
+ getAnnotationBytes(),
+ sun.misc.SharedSecrets.getJavaLangAccess().
+ getConstantPool(getDeclaringClass()),
+ getDeclaringClass());
+ }
+ return declaredAnnotations;
+ }
+}