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JRE 8 rt.jar - java.* Package Source Code
JRE 8 rt.jar is the JAR file for JRE 8 RT (Runtime) libraries. JRE (Java Runtime) 8 is the runtime environment included in JDK 8. JRE 8 rt.jar libraries are divided into 6 packages:
com.* - Internal Oracle and Sun Microsystems libraries java.* - Standard Java API libraries. javax.* - Extended Java API libraries. jdk.* - JDK supporting libraries. org.* - Third party libraries. sun.* - Old libraries developed by Sun Microsystems.
JAR File Information:
Directory of C:\fyicenter\jdk-1.8.0_191\jre\lib 63,596,151 rt.jar
Here is the list of Java classes of the java.* package in JRE 1.8.0_191 rt.jar. Java source codes are also provided.
✍: FYIcenter
⏎ java/beans/PersistenceDelegate.java
/* * Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved. * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. * * * * * * * * * * * * * * * * * * * * */ package java.beans; /** * The PersistenceDelegate class takes the responsibility * for expressing the state of an instance of a given class * in terms of the methods in the class's public API. Instead * of associating the responsibility of persistence with * the class itself as is done, for example, by the * <code>readObject</code> and <code>writeObject</code> * methods used by the <code>ObjectOutputStream</code>, streams like * the <code>XMLEncoder</code> which * use this delegation model can have their behavior controlled * independently of the classes themselves. Normally, the class * is the best place to put such information and conventions * can easily be expressed in this delegation scheme to do just that. * Sometimes however, it is the case that a minor problem * in a single class prevents an entire object graph from * being written and this can leave the application * developer with no recourse but to attempt to shadow * the problematic classes locally or use alternative * persistence techniques. In situations like these, the * delegation model gives a relatively clean mechanism for * the application developer to intervene in all parts of the * serialization process without requiring that modifications * be made to the implementation of classes which are not part * of the application itself. * <p> * In addition to using a delegation model, this persistence * scheme differs from traditional serialization schemes * in requiring an analog of the <code>writeObject</code> * method without a corresponding <code>readObject</code> * method. The <code>writeObject</code> analog encodes each * instance in terms of its public API and there is no need to * define a <code>readObject</code> analog * since the procedure for reading the serialized form * is defined by the semantics of method invocation as laid * out in the Java Language Specification. * Breaking the dependency between <code>writeObject</code> * and <code>readObject</code> implementations, which may * change from version to version, is the key factor * in making the archives produced by this technique immune * to changes in the private implementations of the classes * to which they refer. * <p> * A persistence delegate, may take control of all * aspects of the persistence of an object including: * <ul> * <li> * Deciding whether or not an instance can be mutated * into another instance of the same class. * <li> * Instantiating the object, either by calling a * public constructor or a public factory method. * <li> * Performing the initialization of the object. * </ul> * @see XMLEncoder * * @since 1.4 * * @author Philip Milne */ public abstract class PersistenceDelegate { /** * The <code>writeObject</code> is a single entry point to the persistence * and is used by a <code>Encoder</code> in the traditional * mode of delegation. Although this method is not final, * it should not need to be subclassed under normal circumstances. * <p> * This implementation first checks to see if the stream * has already encountered this object. Next the * <code>mutatesTo</code> method is called to see if * that candidate returned from the stream can * be mutated into an accurate copy of <code>oldInstance</code>. * If it can, the <code>initialize</code> method is called to * perform the initialization. If not, the candidate is removed * from the stream, and the <code>instantiate</code> method * is called to create a new candidate for this object. * * @param oldInstance The instance that will be created by this expression. * @param out The stream to which this expression will be written. * * @throws NullPointerException if {@code out} is {@code null} */ public void writeObject(Object oldInstance, Encoder out) { Object newInstance = out.get(oldInstance); if (!mutatesTo(oldInstance, newInstance)) { out.remove(oldInstance); out.writeExpression(instantiate(oldInstance, out)); } else { initialize(oldInstance.getClass(), oldInstance, newInstance, out); } } /** * Returns true if an <em>equivalent</em> copy of <code>oldInstance</code> may be * created by applying a series of statements to <code>newInstance</code>. * In the specification of this method, we mean by equivalent that the modified instance * is indistinguishable from <code>oldInstance</code> in the behavior * of the relevant methods in its public API. [Note: we use the * phrase <em>relevant</em> methods rather than <em>all</em> methods * here only because, to be strictly correct, methods like <code>hashCode</code> * and <code>toString</code> prevent most classes from producing truly * indistinguishable copies of their instances]. * <p> * The default behavior returns <code>true</code> * if the classes of the two instances are the same. * * @param oldInstance The instance to be copied. * @param newInstance The instance that is to be modified. * @return True if an equivalent copy of <code>newInstance</code> may be * created by applying a series of mutations to <code>oldInstance</code>. */ protected boolean mutatesTo(Object oldInstance, Object newInstance) { return (newInstance != null && oldInstance != null && oldInstance.getClass() == newInstance.getClass()); } /** * Returns an expression whose value is <code>oldInstance</code>. * This method is used to characterize the constructor * or factory method that should be used to create the given object. * For example, the <code>instantiate</code> method of the persistence * delegate for the <code>Field</code> class could be defined as follows: * <pre> * Field f = (Field)oldInstance; * return new Expression(f, f.getDeclaringClass(), "getField", new Object[]{f.getName()}); * </pre> * Note that we declare the value of the returned expression so that * the value of the expression (as returned by <code>getValue</code>) * will be identical to <code>oldInstance</code>. * * @param oldInstance The instance that will be created by this expression. * @param out The stream to which this expression will be written. * @return An expression whose value is <code>oldInstance</code>. * * @throws NullPointerException if {@code out} is {@code null} * and this value is used in the method */ protected abstract Expression instantiate(Object oldInstance, Encoder out); /** * Produce a series of statements with side effects on <code>newInstance</code> * so that the new instance becomes <em>equivalent</em> to <code>oldInstance</code>. * In the specification of this method, we mean by equivalent that, after the method * returns, the modified instance is indistinguishable from * <code>newInstance</code> in the behavior of all methods in its * public API. * <p> * The implementation typically achieves this goal by producing a series of * "what happened" statements involving the <code>oldInstance</code> * and its publicly available state. These statements are sent * to the output stream using its <code>writeExpression</code> * method which returns an expression involving elements in * a cloned environment simulating the state of an input stream during * reading. Each statement returned will have had all instances * the old environment replaced with objects which exist in the new * one. In particular, references to the target of these statements, * which start out as references to <code>oldInstance</code> are returned * as references to the <code>newInstance</code> instead. * Executing these statements effects an incremental * alignment of the state of the two objects as a series of * modifications to the objects in the new environment. * By the time the initialize method returns it should be impossible * to tell the two instances apart by using their public APIs. * Most importantly, the sequence of steps that were used to make * these objects appear equivalent will have been recorded * by the output stream and will form the actual output when * the stream is flushed. * <p> * The default implementation, calls the <code>initialize</code> * method of the type's superclass. * * @param type the type of the instances * @param oldInstance The instance to be copied. * @param newInstance The instance that is to be modified. * @param out The stream to which any initialization statements should be written. * * @throws NullPointerException if {@code out} is {@code null} */ protected void initialize(Class<?> type, Object oldInstance, Object newInstance, Encoder out) { Class<?> superType = type.getSuperclass(); PersistenceDelegate info = out.getPersistenceDelegate(superType); info.initialize(superType, oldInstance, newInstance, out); } }
⏎ java/beans/PersistenceDelegate.java
Or download all of them as a single archive file:
File name: jre-rt-java-1.8.0_191-src.zip File size: 6664831 bytes Release date: 2018-10-28 Download
⇒ JRE 8 rt.jar - javax.* Package Source Code
2023-08-23, 248284👍, 4💬
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