--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/java.base/share/classes/java/lang/invoke/SerializedLambda.java Sun Aug 17 15:54:13 2014 +0100
@@ -0,0 +1,258 @@
+/*
+ * Copyright (c) 2012, 2013, 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.invoke;
+
+import java.io.Serializable;
+import java.lang.reflect.Method;
+import java.security.AccessController;
+import java.security.PrivilegedActionException;
+import java.security.PrivilegedExceptionAction;
+import java.util.Objects;
+
+/**
+ * Serialized form of a lambda expression. The properties of this class
+ * represent the information that is present at the lambda factory site, including
+ * static metafactory arguments such as the identity of the primary functional
+ * interface method and the identity of the implementation method, as well as
+ * dynamic metafactory arguments such as values captured from the lexical scope
+ * at the time of lambda capture.
+ *
+ * <p>Implementors of serializable lambdas, such as compilers or language
+ * runtime libraries, are expected to ensure that instances deserialize properly.
+ * One means to do so is to ensure that the {@code writeReplace} method returns
+ * an instance of {@code SerializedLambda}, rather than allowing default
+ * serialization to proceed.
+ *
+ * <p>{@code SerializedLambda} has a {@code readResolve} method that looks for
+ * a (possibly private) static method called
+ * {@code $deserializeLambda$(SerializedLambda)} in the capturing class, invokes
+ * that with itself as the first argument, and returns the result. Lambda classes
+ * implementing {@code $deserializeLambda$} are responsible for validating
+ * that the properties of the {@code SerializedLambda} are consistent with a
+ * lambda actually captured by that class.
+ *
+ * @see LambdaMetafactory
+ */
+public final class SerializedLambda implements Serializable {
+ private static final long serialVersionUID = 8025925345765570181L;
+ private final Class<?> capturingClass;
+ private final String functionalInterfaceClass;
+ private final String functionalInterfaceMethodName;
+ private final String functionalInterfaceMethodSignature;
+ private final String implClass;
+ private final String implMethodName;
+ private final String implMethodSignature;
+ private final int implMethodKind;
+ private final String instantiatedMethodType;
+ private final Object[] capturedArgs;
+
+ /**
+ * Create a {@code SerializedLambda} from the low-level information present
+ * at the lambda factory site.
+ *
+ * @param capturingClass The class in which the lambda expression appears
+ * @param functionalInterfaceClass Name, in slash-delimited form, of static
+ * type of the returned lambda object
+ * @param functionalInterfaceMethodName Name of the functional interface
+ * method for the present at the
+ * lambda factory site
+ * @param functionalInterfaceMethodSignature Signature of the functional
+ * interface method present at
+ * the lambda factory site
+ * @param implMethodKind Method handle kind for the implementation method
+ * @param implClass Name, in slash-delimited form, for the class holding
+ * the implementation method
+ * @param implMethodName Name of the implementation method
+ * @param implMethodSignature Signature of the implementation method
+ * @param instantiatedMethodType The signature of the primary functional
+ * interface method after type variables
+ * are substituted with their instantiation
+ * from the capture site
+ * @param capturedArgs The dynamic arguments to the lambda factory site,
+ * which represent variables captured by
+ * the lambda
+ */
+ public SerializedLambda(Class<?> capturingClass,
+ String functionalInterfaceClass,
+ String functionalInterfaceMethodName,
+ String functionalInterfaceMethodSignature,
+ int implMethodKind,
+ String implClass,
+ String implMethodName,
+ String implMethodSignature,
+ String instantiatedMethodType,
+ Object[] capturedArgs) {
+ this.capturingClass = capturingClass;
+ this.functionalInterfaceClass = functionalInterfaceClass;
+ this.functionalInterfaceMethodName = functionalInterfaceMethodName;
+ this.functionalInterfaceMethodSignature = functionalInterfaceMethodSignature;
+ this.implMethodKind = implMethodKind;
+ this.implClass = implClass;
+ this.implMethodName = implMethodName;
+ this.implMethodSignature = implMethodSignature;
+ this.instantiatedMethodType = instantiatedMethodType;
+ this.capturedArgs = Objects.requireNonNull(capturedArgs).clone();
+ }
+
+ /**
+ * Get the name of the class that captured this lambda.
+ * @return the name of the class that captured this lambda
+ */
+ public String getCapturingClass() {
+ return capturingClass.getName().replace('.', '/');
+ }
+
+ /**
+ * Get the name of the invoked type to which this
+ * lambda has been converted
+ * @return the name of the functional interface class to which
+ * this lambda has been converted
+ */
+ public String getFunctionalInterfaceClass() {
+ return functionalInterfaceClass;
+ }
+
+ /**
+ * Get the name of the primary method for the functional interface
+ * to which this lambda has been converted.
+ * @return the name of the primary methods of the functional interface
+ */
+ public String getFunctionalInterfaceMethodName() {
+ return functionalInterfaceMethodName;
+ }
+
+ /**
+ * Get the signature of the primary method for the functional
+ * interface to which this lambda has been converted.
+ * @return the signature of the primary method of the functional
+ * interface
+ */
+ public String getFunctionalInterfaceMethodSignature() {
+ return functionalInterfaceMethodSignature;
+ }
+
+ /**
+ * Get the name of the class containing the implementation
+ * method.
+ * @return the name of the class containing the implementation
+ * method
+ */
+ public String getImplClass() {
+ return implClass;
+ }
+
+ /**
+ * Get the name of the implementation method.
+ * @return the name of the implementation method
+ */
+ public String getImplMethodName() {
+ return implMethodName;
+ }
+
+ /**
+ * Get the signature of the implementation method.
+ * @return the signature of the implementation method
+ */
+ public String getImplMethodSignature() {
+ return implMethodSignature;
+ }
+
+ /**
+ * Get the method handle kind (see {@link MethodHandleInfo}) of
+ * the implementation method.
+ * @return the method handle kind of the implementation method
+ */
+ public int getImplMethodKind() {
+ return implMethodKind;
+ }
+
+ /**
+ * Get the signature of the primary functional interface method
+ * after type variables are substituted with their instantiation
+ * from the capture site.
+ * @return the signature of the primary functional interface method
+ * after type variable processing
+ */
+ public final String getInstantiatedMethodType() {
+ return instantiatedMethodType;
+ }
+
+ /**
+ * Get the count of dynamic arguments to the lambda capture site.
+ * @return the count of dynamic arguments to the lambda capture site
+ */
+ public int getCapturedArgCount() {
+ return capturedArgs.length;
+ }
+
+ /**
+ * Get a dynamic argument to the lambda capture site.
+ * @param i the argument to capture
+ * @return a dynamic argument to the lambda capture site
+ */
+ public Object getCapturedArg(int i) {
+ return capturedArgs[i];
+ }
+
+ private Object readResolve() throws ReflectiveOperationException {
+ try {
+ Method deserialize = AccessController.doPrivileged(new PrivilegedExceptionAction<Method>() {
+ @Override
+ public Method run() throws Exception {
+ Method m = capturingClass.getDeclaredMethod("$deserializeLambda$", SerializedLambda.class);
+ m.setAccessible(true);
+ return m;
+ }
+ });
+
+ return deserialize.invoke(null, this);
+ }
+ catch (PrivilegedActionException e) {
+ Exception cause = e.getException();
+ if (cause instanceof ReflectiveOperationException)
+ throw (ReflectiveOperationException) cause;
+ else if (cause instanceof RuntimeException)
+ throw (RuntimeException) cause;
+ else
+ throw new RuntimeException("Exception in SerializedLambda.readResolve", e);
+ }
+ }
+
+ @Override
+ public String toString() {
+ String implKind=MethodHandleInfo.referenceKindToString(implMethodKind);
+ return String.format("SerializedLambda[%s=%s, %s=%s.%s:%s, " +
+ "%s=%s %s.%s:%s, %s=%s, %s=%d]",
+ "capturingClass", capturingClass,
+ "functionalInterfaceMethod", functionalInterfaceClass,
+ functionalInterfaceMethodName,
+ functionalInterfaceMethodSignature,
+ "implementation",
+ implKind,
+ implClass, implMethodName, implMethodSignature,
+ "instantiatedMethodType", instantiatedMethodType,
+ "numCaptured", capturedArgs.length);
+ }
+}