org.zoodb.tools.internal.SerializerTools Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of parent Show documentation
Show all versions of parent Show documentation
ZooDB Java JDO Object Database.
The newest version!
/*
* Copyright 2009-2013 Tilmann Zaeschke. All rights reserved.
*
* This file is part of ZooDB.
*
* ZooDB 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 3 of the License, or
* (at your option) any later version.
*
* ZooDB 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 ZooDB. If not, see , PRIMITIVE> PRIMITIVE_CLASSES =
new IdentityHashMap, PRIMITIVE>();
static {
PRIMITIVE_CLASSES.put(Boolean.class, PRIMITIVE.BOOLEAN);
PRIMITIVE_CLASSES.put(Byte.class, PRIMITIVE.BYTE);
PRIMITIVE_CLASSES.put(Character.class, PRIMITIVE.CHAR);
PRIMITIVE_CLASSES.put(Double.class, PRIMITIVE.DOUBLE);
PRIMITIVE_CLASSES.put(Float.class, PRIMITIVE.FLOAT);
PRIMITIVE_CLASSES.put(Integer.class, PRIMITIVE.INT);
PRIMITIVE_CLASSES.put(Long.class, PRIMITIVE.LONG);
PRIMITIVE_CLASSES.put(Short.class, PRIMITIVE.SHORT);
}
static final IdentityHashMap, PRIMITIVE> PRIMITIVE_TYPES =
new IdentityHashMap, PRIMITIVE>();
static {
PRIMITIVE_TYPES.put(Boolean.TYPE, PRIMITIVE.BOOLEAN);
PRIMITIVE_TYPES.put(Byte.TYPE, PRIMITIVE.BYTE);
PRIMITIVE_TYPES.put(Character.TYPE, PRIMITIVE.CHAR);
PRIMITIVE_TYPES.put(Double.TYPE, PRIMITIVE.DOUBLE);
PRIMITIVE_TYPES.put(Float.TYPE, PRIMITIVE.FLOAT);
PRIMITIVE_TYPES.put(Integer.TYPE, PRIMITIVE.INT);
PRIMITIVE_TYPES.put(Long.TYPE, PRIMITIVE.LONG);
PRIMITIVE_TYPES.put(Short.TYPE, PRIMITIVE.SHORT);
}
// ********************** persistent classes dictionary *******************************
private static final class RefDummy {};
private static final class RefNull {};
private static final class RefPersistent {};
private static final class RefArray {};
//dummy is used, because 0 means undefined class
public static final Class REF_DUMMY = RefDummy.class;
public static final Class REF_NULL = RefNull.class;
public static final Class REF_PERS = RefPersistent.class;
public static final Class REF_ARRAY = RefArray.class;
public static final byte REF_PERS_ID = 1;
public static final byte REF_ARRAY_ID = 2;
public static final int REF_CLS_OFS;
// Here is how class information is transmitted:
// If the class does not exist in the hashMap, then it is added and its
// name is written to the stream. Otherwise only the id of the class in
// the List in written.
// The class information is required because it can be any sub-type of the
// Field type, but the exact type is required for instantiation.
// This can't be static. To make sure that the IDs are the same for
// server and client, the map has to be rebuild for every Transaction,
//or at least for every new connection.
// Otherwise problems would occur if e.g. one of the processes crash
// and has to rebuild it's map, or if the Sender uses the same Map for
// all receivers, regardless whether they all get the same data.
static final IdentityHashMap, Byte> PRE_DEF_CLASSES_MAP;
static final ArrayList> PRE_DEF_CLASSES_ARRAY;
static {
IdentityHashMap, Byte> map = new IdentityHashMap, Byte>();
ArrayList> list = new ArrayList>();
list.add(REF_DUMMY); //Not used.
list.add(REF_PERS); //Field type is non-persistent-capable, but referenced object is FCO.
list.add(REF_ARRAY); //Indicates array. There is no need to serialize array type names,
//because they consist only of depth and component type name.
//primitive classes
list.add(Boolean.TYPE);
list.add(Byte.TYPE);
list.add(Character.TYPE);
list.add(Double.TYPE);
list.add(Float.TYPE);
list.add(Integer.TYPE);
list.add(Long.TYPE);
list.add(Short.TYPE);
//primitive array classes
list.add(boolean[].class);
list.add(byte[].class);
list.add(char[].class);
list.add(double[].class);
list.add(float[].class);
list.add(int[].class);
list.add(long[].class);
list.add(short[].class);
list.add(boolean[][].class);
list.add(byte[][].class);
list.add(char[][].class);
list.add(double[][].class);
list.add(float[][].class);
list.add(int[][].class);
list.add(long[][].class);
list.add(short[][].class);
//primitive classes
list.add(Boolean.class);
list.add(Byte.class);
list.add(Character.class);
list.add(Double.class);
list.add(Float.class);
list.add(Integer.class);
list.add(Long.class);
list.add(Short.class);
//primitive array classes
list.add(Boolean[].class);
list.add(Byte[].class);
list.add(Character[].class);
list.add(Double[].class);
list.add(Float[].class);
list.add(Integer[].class);
list.add(Long[].class);
list.add(Short[].class);
//other java classes
list.add(String.class);
list.add(String[].class);
list.add(Date.class);
list.add(Date[].class);
list.add(URL.class);
list.add(URL[].class);
list.add(UUID.class);
list.add(UUID[].class);
list.add(Enum.class);
//persistent classes
//We don't list persistent capable classes such as DBVector here. It would not safe much,
//as we only store the oid of the schema anyway.
//for future improvements
list.add(REF_DUMMY);
list.add(REF_DUMMY);
list.add(REF_DUMMY);
list.add(REF_DUMMY);
list.add(REF_DUMMY);
list.add(REF_DUMMY);
list.add(REF_DUMMY);
list.add(REF_DUMMY);
list.add(REF_DUMMY);
list.add(REF_DUMMY);
list.add(REF_DUMMY);
list.add(REF_DUMMY);
list.add(REF_DUMMY);
list.add(REF_DUMMY);
list.add(REF_DUMMY);
list.add(REF_DUMMY);
list.add(REF_DUMMY);
list.add(REF_DUMMY);
list.add(REF_DUMMY);
list.add(REF_DUMMY);
//Map, List, Set, ...?
list.add(List.class);
list.add(Set.class);
list.add(Map.class);
list.add(HashMap.class);
list.add(HashSet.class);
list.add(LinkedList.class);
list.add(ArrayList.class);
list.add(Hashtable.class);
list.add(Vector.class);
//fill map
for (int i = 0; i < list.size(); i++) {
map.put(list.get(i), (byte)i);
}
//TODO use real array?
//PRE_DEF_CLASSES_ARRAY = Collections.unmodifiableList(list);
PRE_DEF_CLASSES_ARRAY = list;
//PRE_DEF_CLASSES_MAP = (IdentityHashMap, Short>) Collections.unmodifiableMap(map);
PRE_DEF_CLASSES_MAP = map;
//TODO set fixed, e.g. 100?
REF_CLS_OFS = list.size();
//REF_PERS_ID = map.get(REF_PERS);
if (REF_PERS_ID != map.get(REF_PERS)) {
throw new IllegalStateException("" + REF_PERS_ID + " / " + map.get(REF_PERS));
}
if (REF_ARRAY_ID != map.get(REF_ARRAY)) {
throw new IllegalStateException("" + REF_ARRAY_ID + " / " + map.get(REF_ARRAY));
}
}
// ********************** persistent classes fields *******************************
// Synchronised to allow concurrent access from different Threads.
private static final ConcurrentHashMap, List> _seenClasses =
new ConcurrentHashMap, List>();
static final List getFields(Class cl) {
List fields = _seenClasses.get(cl);
if (fields != null) {
return _seenClasses.get(cl);
}
// TODO the following could be optimised:
// Instead of filling a List with all attributes and then removing the
// undesired ones, the List should be build up only with desired
// attributes
// while looping through the individual arrays from getDeclaredFields();
// Add attributes of super-classes for jar,
// these are already included in the database class.
Field[] fieldA = cl.getDeclaredFields();
fields = new LinkedList(Arrays.asList(fieldA));
Class cSuper = cl.getSuperclass();
while (cSuper != null) {
Collections.addAll(fields, cSuper.getDeclaredFields());
cSuper = cSuper.getSuperclass();
}
// Remove transient and static attrs from list (they are not in the DB)
ListIterator vil = fields.listIterator();
vil = fields.listIterator(0);
int modifiers;
while (vil.hasNext()) {
try {
Field field = vil.next();
modifiers = field.getModifiers();
if (Modifier.isTransient(modifiers)
|| Modifier.isStatic(modifiers)) {
vil.remove();
continue;
}
if (field.getName().startsWith("_vj_")) {
throw new IllegalStateException("Bad field: " + field);
}
// The following is alright because this class is only used
// in a daemon.
field.setAccessible(true);
} catch (RuntimeException e) {
throw e;
}
}
//Because we are not in a synchronised block, this may actually
//overwrite an existing entry. But it's very unlikely and would not do
//any harm, so we do not synchronise here. Using a synchronised Map
//should be sufficient.
_seenClasses.put(cl, fields);
return fields;
}
public static Class getPrimitiveType(String name) {
for (Class cls: PRIMITIVE_TYPES.keySet()) {
if (cls.getName().equals(name)) {
return cls;
}
}
return null;
}
}
© 2015 - 2025 Weber Informatics LLC | Privacy Policy