From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- libjava/classpath/java/io/ObjectStreamField.java | 401 +++++++++++++++++++++++ 1 file changed, 401 insertions(+) create mode 100644 libjava/classpath/java/io/ObjectStreamField.java (limited to 'libjava/classpath/java/io/ObjectStreamField.java') diff --git a/libjava/classpath/java/io/ObjectStreamField.java b/libjava/classpath/java/io/ObjectStreamField.java new file mode 100644 index 000000000..dfb6728a7 --- /dev/null +++ b/libjava/classpath/java/io/ObjectStreamField.java @@ -0,0 +1,401 @@ +/* ObjectStreamField.java -- Class used to store name and class of fields + Copyright (C) 1998, 1999, 2003, 2004, 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath 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 for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.io; + +import gnu.java.lang.reflect.TypeSignature; + +import java.lang.reflect.Field; +import java.security.AccessController; +import java.security.PrivilegedAction; + +/** + * This class intends to describe the field of a class for the serialization + * subsystem. Serializable fields in a serializable class can be explicitly + * exported using an array of ObjectStreamFields. + * + * @author Tom Tromey (tromey@redhat.com) + * @author Jeroen Frijters (jeroen@frijters.net) + * @author Guilhem Lavaux (guilhem@kaffe.org) + * @author Michael Koch (konqueror@gmx.de) + * @author Andrew John Hughes (gnu_andrew@member.fsf.org) + */ +public class ObjectStreamField + implements Comparable +{ + private String name; + private Class type; + private String typename; + private int offset = -1; // XXX make sure this is correct + private boolean unshared; + private boolean persistent = false; + private boolean toset = true; + Field field; + + ObjectStreamField (Field field) + { + this (field.getName(), field.getType()); + this.field = field; + } + + /** + * This constructor creates an ObjectStreamField instance + * which represents a field named name and is + * of the type type. + * + * @param name Name of the field to export. + * @param type Type of the field in the concerned class. + */ + public ObjectStreamField (String name, Class type) + { + this (name, type, false); + } + + /** + * This constructor creates an ObjectStreamField instance + * which represents a field named name and is + * of the type type. + * + * @param name Name of the field to export. + * @param type Type of the field in the concerned class. + * @param unshared true if field will be unshared, false otherwise. + */ + public ObjectStreamField (String name, Class type, boolean unshared) + { + if (name == null) + throw new NullPointerException(); + + this.name = name; + this.type = type; + this.typename = TypeSignature.getEncodingOfClass(type); + this.unshared = unshared; + } + + /** + * There are many cases you can not get java.lang.Class from typename + * if your context class loader cannot load it, then use typename to + * construct the field. + * + * @param name Name of the field to export. + * @param typename The coded name of the type for this field. + */ + ObjectStreamField (String name, String typename) + { + this.name = name; + this.typename = typename; + } + + void resolveType(ClassLoader loader) + { + try + { + type = TypeSignature.getClassForEncoding(typename, true, loader); + } + catch(ClassNotFoundException e) + { + } + } + + /** + * This method returns the name of the field represented by the + * ObjectStreamField instance. + * + * @return A string containing the name of the field. + */ + public String getName () + { + return name; + } + + /** + * This method returns the class representing the type of the + * field which is represented by this instance of ObjectStreamField. + * + * @return A class representing the type of the field. + */ + public Class getType () + { + return type; + } + + /** + * This method returns the char encoded type of the field which + * is represented by this instance of ObjectStreamField. + * + * @return A char representing the type of the field. + */ + public char getTypeCode () + { + return typename.charAt (0); + } + + /** + * This method returns a more explicit type name than + * {@link #getTypeCode()} in the case the type is a real + * class (and not a primitive). + * + * @return The name of the type (class name) if it is not a + * primitive, in the other case null is returned. + */ + public String getTypeString () + { + // use intern() + if (isPrimitive()) + return null; + return typename.intern(); + } + + /** + * This method returns the current offset of the field in + * the serialization stream relatively to the other fields. + * The offset is expressed in bytes. + * + * @return The offset of the field in bytes. + * @see #setOffset(int) + */ + public int getOffset () + { + return offset; + } + + /** + * This method sets the current offset of the field. + * + * @param off The offset of the field in bytes. + * @see #getOffset() + */ + protected void setOffset (int off) + { + offset = off; + } + + /** + * This method returns whether the field represented by this object is + * unshared or not. + * + * @return Tells if this field is unshared or not. + */ + public boolean isUnshared () + { + return unshared; + } + + /** + * This method returns true if the type of the field + * represented by this instance is a primitive. + * + * @return true if the type is a primitive, false + * in the other case. + */ + public boolean isPrimitive () + { + return typename.length() == 1; + } + + /** + * Compares this object to the given object. + * + * @param obj the object to compare to. + * + * @return -1, 0 or 1. + */ + public int compareTo (Object obj) + { + ObjectStreamField f = (ObjectStreamField) obj; + boolean this_is_primitive = isPrimitive (); + boolean f_is_primitive = f.isPrimitive (); + + if (this_is_primitive && !f_is_primitive) + return -1; + + if (!this_is_primitive && f_is_primitive) + return 1; + + return getName ().compareTo (f.getName ()); + } + + /** + * This method is specific to classpath's implementation and so has the default + * access. It changes the state of this field to "persistent". It means that + * the field should not be changed when the stream is read (if it is not + * explicitly specified using serialPersistentFields). + * + * @param persistent True if the field is persistent, false in the + * other cases. + * @see #isPersistent() + */ + void setPersistent(boolean persistent) + { + this.persistent = persistent; + } + + /** + * This method returns true if the field is marked as persistent. + * + * @return True if persistent, false in the other cases. + * @see #setPersistent(boolean) + */ + boolean isPersistent() + { + return persistent; + } + + /** + * This method is specific to classpath's implementation and so + * has the default access. It changes the state of this field as + * to be set by ObjectInputStream. + * + * @param toset True if this field should be set, false in the other + * cases. + * @see #isToSet() + */ + void setToSet(boolean toset) + { + this.toset = toset; + } + + /** + * This method returns true if the field is marked as to be + * set. + * + * @return True if it is to be set, false in the other cases. + * @see #setToSet(boolean) + */ + boolean isToSet() + { + return toset; + } + + /** + * This method searches for its field reference in the specified class + * object. It requests privileges. If an error occurs the internal field + * reference is not modified. + * + * @throws NoSuchFieldException if the field name does not exist in this class. + * @throws SecurityException if there was an error requesting the privileges. + */ + void lookupField(Class clazz) throws NoSuchFieldException, SecurityException + { + final Field f = clazz.getDeclaredField(name); + + AccessController.doPrivileged(new PrivilegedAction() + { + public Object run() + { + f.setAccessible(true); + return null; + } + }); + + this.field = f; + } + + /** + * This method check whether the field described by this + * instance of ObjectStreamField is compatible with the + * actual implementation of this field. + * + * @throws NullPointerException if this field does not exist + * in the real class. + * @throws InvalidClassException if the types are incompatible. + */ + void checkFieldType() throws InvalidClassException + { + Class ftype = field.getType(); + + if (!ftype.isAssignableFrom(type)) + throw new InvalidClassException + ("invalid field type for " + name + + " in class " + field.getDeclaringClass()); + } + + /** + * Returns a string representing this object. + * + * @return the string. + */ + public String toString () + { + return "ObjectStreamField< " + type + " " + name + " >"; + } + + final void setBooleanField(Object obj, boolean val) + { + VMObjectStreamClass.setBooleanNative(field, obj, val); + } + + final void setByteField(Object obj, byte val) + { + VMObjectStreamClass.setByteNative(field, obj, val); + } + + final void setCharField(Object obj, char val) + { + VMObjectStreamClass.setCharNative(field, obj, val); + } + + final void setShortField(Object obj, short val) + { + VMObjectStreamClass.setShortNative(field, obj, val); + } + + final void setIntField(Object obj, int val) + { + VMObjectStreamClass.setIntNative(field, obj, val); + } + + final void setLongField(Object obj, long val) + { + VMObjectStreamClass.setLongNative(field, obj, val); + } + + final void setFloatField(Object obj, float val) + { + VMObjectStreamClass.setFloatNative(field, obj, val); + } + + final void setDoubleField(Object obj, double val) + { + VMObjectStreamClass.setDoubleNative(field, obj, val); + } + + final void setObjectField(Object obj, Object val) + { + VMObjectStreamClass.setObjectNative(field, obj, val); + } +} -- cgit v1.2.3