gvsig-tools / org.gvsig.tools / library / trunk / org.gvsig.tools / org.gvsig.tools.lib / src / main / java / org / gvsig / tools / persistence / PersistenceManager.java @ 2145
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/**
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* gvSIG. Desktop Geographic Information System.
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*
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* Copyright (C) 2007-2013 gvSIG Association.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*
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* For any additional information, do not hesitate to contact us
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* at info AT gvsig.com, or visit our website www.gvsig.com.
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*/
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package org.gvsig.tools.persistence; |
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import java.io.InputStream; |
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import java.io.OutputStream; |
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import java.util.List; |
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import java.util.Map; |
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import org.apache.commons.lang3.mutable.MutableInt; |
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import org.gvsig.tools.dynobject.DynStruct; |
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import org.gvsig.tools.persistence.exception.AddDefinitionException; |
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import org.gvsig.tools.persistence.exception.PersistenceClassNotRegistered; |
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import org.gvsig.tools.persistence.exception.PersistenceCreateException; |
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import org.gvsig.tools.persistence.exception.PersistenceException; |
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import org.gvsig.tools.persistence.exception.PersistenceValidateExceptions; |
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import org.gvsig.tools.persistence.spi.PersistentContextServices; |
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/**
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* <p>
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* This interface contains the necessary methods to get a persistent
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* representation of an object, suitable for storage or transmission, and to
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* create a an object from its persistent representation.
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* </p>
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*
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* @author The gvSIG project <http://www.gvsig.org>
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* @author Cesar Martinez Izquierdo <cesar.martinez@iver.es>
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* @author IVER T.I. <http://www.iver.es>
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*/
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public interface PersistenceManager { |
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public interface Factories extends List { |
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/**
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* Add a new factory to the list registering an alias.
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*
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* If factory already registered anly add the alias.
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*
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* @param factory
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* @param classNameAlias
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* @return true when ok.
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*/
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public boolean add(PersistenceFactory factory, String classNameAlias); |
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/**
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* Add a new class to the factory.
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*
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* @param factory
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* @return true when ok
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*/
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public boolean add(PersistenceFactory factory); |
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/**
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* Return factory associated to class passed as parameter.
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*
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* @param class name
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*
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* @return Persistence factory that manage the class
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*/
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public abstract PersistenceFactory get(Class theClass); |
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/**
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* Return factory associated to the object passed as parameter.
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*
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* @param object
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*
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* @return Persistence factory that manage object
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*/
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public PersistenceFactory get(Object object); |
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/**
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* Return factory associated to the object stored in the state.
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*
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* @param state
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*
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* @return Persistence factory that manage the state
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*/
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public PersistenceFactory get(PersistentState state);
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} |
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/**
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* The namespace used on the definition of DynClasses used by the
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* persistence manager.
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*/
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public static final String PERSISTENCE_NAMESPACE = "Persistence"; |
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public static final String PERSISTENCE_DYNOBJECT_NAMESPACE = "PersistenceDynObject"; |
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public static final String DEFAULT_DOMAIN_URL = "http://www.gvsig.org"; |
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public static final String DEFAULT_DOMAIN_NAME = "gvsig"; |
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/**
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* <p>
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* Validation Mode -- MANDATORY: Validation is active, so
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* {@link PersistenceManager#create(org.gvsig.tools.persistence.PersistentState)}
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* and {@link PersistenceManager#getState(Object)} will throw validation
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* exceptions if validation errors are found.
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* </p>
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* <p>
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* If an undeclared attribute or class is found, this will be considered a
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* validation error.
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* </p>
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*/
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static public final int MANDATORY = 3; |
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/**
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* <p>
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* Validation Mode -- MANDATORY_IF_DECLARED: Validation is active, but it
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* will be only applied to Persistent objects which have been registered.
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* {@link PersistenceManager#create(org.gvsig.tools.persistence.PersistentState)}
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* and {@link PersistenceManager#getState(Object)} methods will throw
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* validation exceptions if validation errors are found.
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* </p>
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*/
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static public final int MANDATORY_IF_DECLARED = 2; |
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/**
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* <p>
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* Validation Mode - DISABLED: No validation is performed at all. In this
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* mode, {@link PersistenceManager#ge}
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* </p>
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*/
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static public final int DISABLED = 0; |
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/**
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* <p>
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* Creates a persistent state from an Persistent object.
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* </p>
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*
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* @param obj
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* The Persistent object to be persisted
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*
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* @return A PersistentState object, which stores the state of the provided
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* Persistent Object.
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* @throws PersistenceException
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*/
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public PersistentState getState(Object obj) throws PersistenceException; |
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/**
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* Creates a persistent state from an Persistent object.
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*
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* When collectAllErrors is true, try to continue when an error
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* is detected, and raise all errors when finish the process.
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*
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* @param obj
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* @param collectAllErrors
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* @return
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* @throws PersistenceException
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*/
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public PersistentState getState(Object obj, boolean collectAllErrors) throws PersistenceException; |
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public PersistentState getState(Object obj, boolean collectAllErrors, MutableInt referenceCounter) throws PersistenceException; |
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/**
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* <p>
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* Instantiates an object from a persistent state. The PersistentState
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* object knows the class of the persisted object, and instantiates it by
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* using introspection. The object must implement the Persistent interface
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* so that it can understand the PersistentState.
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* </p>
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*
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* @param state
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* The state of the object to be instantiated
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* @return A new object whose state is the same as the provided
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* <code>state</code> object.
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*
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* @throws PersistenceException
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* @throws PersistenceCreateException
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*/
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public Object create(PersistentState state) throws PersistenceException, |
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PersistenceCreateException; |
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/**
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* <p>
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* Associates an alias with a class. This is similar to a symbolic link,
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* which allows to access the class by means of its alias.
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* </p>
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*
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* <p>
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* When an alias is defined, it replaces any class whose qualified name is
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* equal to the alias. Therefore, this class will never be instantiated, and
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* instead the class pointed by the the alias will be instantiated.
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* </p>
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*
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* <p>
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* For example, if the following alias is defined:
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* </p>
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*
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* <pre>
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* Class aClass = org.gvsig.fmap.mapcontext.rendering.symbols.SimpleMarkerSymbol.class;
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* manager.addAlias(
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* "org.gvsig.fmap.mapcontext.rendering.symbols.ArrowMarkerSymbol", aClass);
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* </pre>
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* <p>
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* then, SimpleMarkerSymbol will be instantiated instead of
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* ArrowMarkerSymbol from any PersistentState which references
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* ArrowMarkerSymbol.
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* </p>
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*
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* <p>
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* Aliases are useful to provided backward-compatibility paths (as old no
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* existing classes may be aliased to substitution classes), but are also
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* useful to avoid limitations on ClassLoaders. As a Class object is
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* provided, it will be possible to instantiate it even if the current
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* ClassLoader has no direct visibility of the class to instantiate.
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* </p>
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*
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* @param alias
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* The alias to reference a class
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* @param aClass
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* The class to be referenced by the alias
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*
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* @throws PersistenceClassNotRegistered
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* if <code>aClass</code> is not registered
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*/
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public void addAlias(String alias, Class theClass) |
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throws PersistenceClassNotRegistered;
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/**
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* Add a new definition to the class in the persistent manager.
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*
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* The new definition is defined in the namespace by default for DynClasses
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* used in persistence.
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*
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* if domainName or domainURL are null, values by default arent supplied by
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* the manager.
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*
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* <b>Note:</b> A <code>domainName</code> can by in only one
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* <code>domainURL</code>. If you try to register the same
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* <code>domainName</code> with two URL an exception will be raised. </p>
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*
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* @param persistentClass
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* @param name
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* of the new definition
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* @param description
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* of the new definition, can be null.
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* @param domainName
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* , can be null.
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* @param domainURL
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* , can be null.
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* @return the new definition
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*/
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public DynStruct addDefinition(Class persistentClass, String name, |
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String description, String domainName, String domainURL) |
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throws AddDefinitionException;
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/**
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* Add a new definition to the class in the persistent manager.
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*
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* @param theClass
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* to be persistent
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* @param name
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* of the class definition to associate to theClass
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* @param definitions
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* input stream from load the definitions of classes
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* @param loader
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* , loader to resolve references to classes
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* @param domainName
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* (can be null)
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* @param domainUrl
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* (can be null)
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* @return
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*
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* @see #addDefinition(Class, String, String, String, String)
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*/
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public DynStruct addDefinition(Class theClass, String name, |
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InputStream definitions, ClassLoader loader, String domainName, |
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String domainUrl) throws AddDefinitionException; |
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public DynStruct updateDefinition(Class theClass, String name, |
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InputStream definitions, ClassLoader loader, String domainName, |
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String domainUrl) throws AddDefinitionException; |
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public void addDefinition(Class theClass, String name, String resourceName); |
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public void addDefinition(Class theClass, String name, InputStream resource); |
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/**
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* Add a new definition to the class in the persistent manager.
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*
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* @param theClass
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* to be persistent
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* @param name
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* of the class definition to associate to theClass
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* @param definitions
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* , map from get the definition of the class
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* @param domainName
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* (can be null)
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* @param domainUrl
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* (can be null)
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* @return
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*
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* @see #addDefinition(Class, String, String, String, String)
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*/
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public DynStruct addDefinition(Class theClass, String name, |
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Map definitions, String domainName, String domainUrl) |
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throws AddDefinitionException;
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/**
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* Add a new definition to the class in the persistent manager.
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*
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* @param definition
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* , TODO
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* @param domainName
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* (can be null)
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* @param domainUrl
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* (can be null)
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* @return
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*
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* @see #addDefinition(Class, String, String, String, String)
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*/
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public DynStruct addDefinition(DynStruct definition, String domainName, |
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String domainUrl)
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throws AddDefinitionException;
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/**
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* <p>
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* Register an instance of {@link PersistenceFactory} that can manage some
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* objects that requires an especial construction or persistence. This
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* factory will use the default domain name and URL.
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* </p>
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*
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*
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* @param factory
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*/
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public void registerFactory(PersistenceFactory factory); |
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public void unregisterFactory(PersistenceFactory factory); |
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/**
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* <p>
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* Unregister a registered class from the manager.
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* </p>
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*
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* @param persistentClass
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*
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* @see #registerClass(Class, DynStruct, String)
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*
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* @throws PersistenceClassNotRegistered
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* if <code>persistentClass</code> is not registered
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*/
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public void unregisterClass(Class theClass) |
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throws PersistenceClassNotRegistered;
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/**
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* <p>
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* Unregister a registered java class from the manager.
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* </p>
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*
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* @param className the java class name to unregister
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*
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* @see #registerClass(Class)
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*
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* @throws PersistenceClassNotRegistered
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* if <code>className</code> is not registered
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*/
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public void unregisterClass(String className) |
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throws PersistenceClassNotRegistered;
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/**
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* <p>
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* Validates persistent state by using the corresponding registered
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* attribute definition. <code>mode</code> specifies what to do when a
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* definition of a state class is not registered.
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* </p>
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*
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* @param state
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* @param mode
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* @throws PersistenceValidateExceptions
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*
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*/
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public void validate(PersistentState state, int mode) |
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throws PersistenceValidateExceptions;
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/**
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* <p>
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* Validates all persistent state related to the <code>state</code> by using
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* the corresponding registered attribute definition. <code>mode</code>
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* specifies what to do when a definition of a state class is not
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* registered.
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* </p>
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*
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* @param state
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* @param mode
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*
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* @throws PersistenceValidateExceptions
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*
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* @see {@link #setAutoValidation(int)}
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*
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*/
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public void validateAll(PersistentState state, int mode) |
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throws PersistenceValidateExceptions;
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/**
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* <p>
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* If the provided persistent class has registered an attribute definition
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* in this manager, then this method returns that definition. Otherwise, it
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* returns null.
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* </p>
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*
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* @param persistentClass
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* The class whose corresponding attribute definition is to be
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* retrieved.
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*
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* @return The attribute definition corresponding to the provided persistent
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* class, or null otherwise.
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*/
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public DynStruct getDefinition(Class persistentClass); |
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/**
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* <p>
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* Return the associated definition to the java class name passed as parameter.
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* </p>
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*
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* @param name of the java class to retrieve definition
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*
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* @return The attribute definition corresponding to the provided java
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* class, or null otherwise.
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*/
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public DynStruct getDefinition(String name); |
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/**
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* <p>
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* Return the associated definition to the dynClass name passed as parameter.
|
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* </p>
|
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*
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* @param name of the dynClass to retrieve definition
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*
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* @return The attribute definition corresponding to the provided dynClass, or null otherwise.
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*/
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public DynStruct getDynObjectDefinition(String className); |
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|
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/**
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* <p>
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* De-serializes an state from the data read from the provided
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* <code>reader</code>. Depending on the implementation the serialized data
|
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* may have different formats, such as XML or binary data.
|
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* </p>
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*
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* <p>
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* Note that a particular implementation will only be able to de-serialize
|
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* data which has been serialized by the same implementation.
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* </p>
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*
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* @param in
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* @param context
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* @return
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* @throws org.gvsig.tools.persistence.exception.PersistenceException
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*/
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public PersistentState loadState(InputStream in, PersistentContext context) |
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throws PersistenceException;
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|
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public PersistentState loadState(InputStream in) |
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throws PersistenceException;
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|
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/**
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* <p>
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* Serializes the {@link PersistentState} and writes the serialized data in
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* the provided {@link OutputStream}. Depending on the implementation the
|
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* serialized data may have different formats, such as XML or binary data.
|
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* </p>
|
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*
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* <p>
|
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* Note that a particular implementation will only be able to de-serialize
|
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* data which has been serialized by the same implementation.
|
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* </p>
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*
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* @param state
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* @param out
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* @throws PersistenceValidateExceptions
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*/
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public void saveState(PersistentState state, OutputStream out) |
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throws PersistenceException, PersistenceValidateExceptions;
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public void saveState(PersistentState state, OutputStream out, boolean collectErrors) |
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throws PersistenceException, PersistenceValidateExceptions;
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|
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/**
|
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* <p>
|
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* De-serializes an state from the data read from the provided
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* <code>is</code>. Depending on the implementation the serialized data
|
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* may have different formats, such as XML or binary data.
|
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* </p>
|
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*
|
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* <p>
|
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* Note that a particular implementation will only be able to de-serialize
|
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* data which has been serialized by the same implementation.
|
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* </p>
|
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*
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* @param reader
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* @return
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*
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* @param is
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* @return
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*/
|
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public Object getObject(InputStream is); |
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|
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/**
|
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* <p>
|
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* Serializes the object "obj" and writes the serialized data in
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* the provided {@link OutputStream}. Depending on the implementation the
|
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* serialized data may have different formats, such as XML or binary data.
|
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* </p>
|
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*
|
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* <p>
|
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* Note that a particular implementation will only be able to de-serialize
|
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* data which has been serialized by the same implementation.
|
527 |
* </p>
|
528 |
*
|
529 |
* @param os
|
530 |
* @param obj
|
531 |
*/
|
532 |
public void putObject(OutputStream os, Object obj); |
533 |
|
534 |
/**
|
535 |
* <p>
|
536 |
* Sets the validation which will be applied in {@link #getState(Object)},
|
537 |
* {@link #create(PersistentState)} methods. Validation ensures that
|
538 |
* persisted or de-persisted objects match the declared definition (which
|
539 |
* must have been previously registered by using
|
540 |
* {@link #registerClass(Class, DynStruct)}).
|
541 |
* </p>
|
542 |
*
|
543 |
* <p>
|
544 |
* When automatic validation is enabled (MANDATORY or
|
545 |
* MANDATORY_IF_DECLARED), a ValidationException will be thrown by
|
546 |
* {@link #getState(Object)}, {@link #create(PersistentState)} if a
|
547 |
* validation error is found.
|
548 |
* </p>
|
549 |
*
|
550 |
* @param validationMode
|
551 |
* On of the following values: {@link #DISABLED},
|
552 |
* {@link #MANDATORY} or {@link #MANDATORY_IF_DECLARED}
|
553 |
*
|
554 |
* @see #validateAll(PersistentState)
|
555 |
* @see #registerClass(Class, DynStruct)
|
556 |
*
|
557 |
* @throws PersistenceException
|
558 |
* If the mode is not supported by this manager
|
559 |
*/
|
560 |
public void setAutoValidation(int validationMode) |
561 |
throws PersistenceException;
|
562 |
|
563 |
/**
|
564 |
* <p>
|
565 |
* Gets the validation which will be applied in {@link #getState(Object)},
|
566 |
* {@link #create(PersistentState)} methods.
|
567 |
*
|
568 |
* @return The current mode for automatic validation: {@link #DISABLED},
|
569 |
* {@link #MANDATORY} or {@link #MANDATORY_IF_DECLARED}
|
570 |
*
|
571 |
* @see #validateAll(PersistentState)
|
572 |
* @see #registerClass(Class, DynStruct)
|
573 |
*/
|
574 |
public int getAutoValidation(); |
575 |
|
576 |
public Factories getFactories();
|
577 |
|
578 |
public PersistentContext getNewContext();
|
579 |
|
580 |
public PersistentContext getNewContext(MutableInt referenceCounter);
|
581 |
|
582 |
} |