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    1   /*
    2    * Hibernate, Relational Persistence for Idiomatic Java
    3    *
    4    * Copyright (c) 2008, Red Hat Middleware LLC or third-party contributors as
    5    * indicated by the @author tags or express copyright attribution
    6    * statements applied by the authors.  All third-party contributions are
    7    * distributed under license by Red Hat Middleware LLC.
    8    *
    9    * This copyrighted material is made available to anyone wishing to use, modify,
   10    * copy, or redistribute it subject to the terms and conditions of the GNU
   11    * Lesser General Public License, as published by the Free Software Foundation.
   12    *
   13    * This program is distributed in the hope that it will be useful,
   14    * but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
   15    * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
   16    * for more details.
   17    *
   18    * You should have received a copy of the GNU Lesser General Public License
   19    * along with this distribution; if not, write to:
   20    * Free Software Foundation, Inc.
   21    * 51 Franklin Street, Fifth Floor
   22    * Boston, MA  02110-1301  USA
   23    *
   24    */
   25   package org.hibernate.intercept.cglib;
   26   
   27   import java.io.Serializable;
   28   import java.util.Set;
   29   
   30   import net.sf.cglib.transform.impl.InterceptFieldCallback;
   31   
   32   import org.hibernate.intercept.AbstractFieldInterceptor;
   33   import org.hibernate.engine.SessionImplementor;
   34   import org.hibernate.proxy.HibernateProxy;
   35   import org.hibernate.proxy.LazyInitializer;
   36   
   37   /**
   38    * A field-level interceptor that initializes lazily fetched properties.
   39    * This interceptor can be attached to classes instrumented by CGLIB.
   40    * Note that this implementation assumes that the instance variable
   41    * name is the same as the name of the persistent property that must
   42    * be loaded.
   43    *
   44    * @author Gavin King
   45    */
   46   public final class FieldInterceptorImpl extends AbstractFieldInterceptor implements InterceptFieldCallback, Serializable {
   47   
   48   	/**
   49   	 * Package-protected constructor
   50   	 *
   51   	 * @param session The Hibernate session
   52   	 * @param uninitializedFields Names of the fields we need to initialize on load
   53   	 * @param entityName The entity name to which we are being bound
   54   	 */
   55   	FieldInterceptorImpl(SessionImplementor session, Set uninitializedFields, String entityName) {
   56   		super( session, uninitializedFields, entityName );
   57   	}
   58   
   59   	public boolean readBoolean(Object target, String name, boolean oldValue) {
   60   		return ( ( Boolean ) intercept( target, name, oldValue  ? Boolean.TRUE : Boolean.FALSE ) )
   61   				.booleanValue();
   62   	}
   63   
   64   	public byte readByte(Object target, String name, byte oldValue) {
   65   		return ( ( Byte ) intercept( target, name, new Byte( oldValue ) ) ).byteValue();
   66   	}
   67   
   68   	public char readChar(Object target, String name, char oldValue) {
   69   		return ( ( Character ) intercept( target, name, new Character( oldValue ) ) )
   70   				.charValue();
   71   	}
   72   
   73   	public double readDouble(Object target, String name, double oldValue) {
   74   		return ( ( Double ) intercept( target, name, new Double( oldValue ) ) )
   75   				.doubleValue();
   76   	}
   77   
   78   	public float readFloat(Object target, String name, float oldValue) {
   79   		return ( ( Float ) intercept( target, name, new Float( oldValue ) ) )
   80   				.floatValue();
   81   	}
   82   
   83   	public int readInt(Object target, String name, int oldValue) {
   84   		return ( ( Integer ) intercept( target, name, new Integer( oldValue ) ) )
   85   				.intValue();
   86   	}
   87   
   88   	public long readLong(Object target, String name, long oldValue) {
   89   		return ( ( Long ) intercept( target, name, new Long( oldValue ) ) ).longValue();
   90   	}
   91   
   92   	public short readShort(Object target, String name, short oldValue) {
   93   		return ( ( Short ) intercept( target, name, new Short( oldValue ) ) )
   94   				.shortValue();
   95   	}
   96   
   97   	public Object readObject(Object target, String name, Object oldValue) {
   98   		Object value = intercept( target, name, oldValue );
   99   		if (value instanceof HibernateProxy) {
  100   			LazyInitializer li = ( (HibernateProxy) value ).getHibernateLazyInitializer();
  101   			if ( li.isUnwrap() ) {
  102   				value = li.getImplementation();
  103   			}
  104   		}
  105   		return value;
  106   	}
  107   
  108   	public boolean writeBoolean(Object target, String name, boolean oldValue, boolean newValue) {
  109   		dirty();
  110   		intercept( target, name, oldValue ? Boolean.TRUE : Boolean.FALSE );
  111   		return newValue;
  112   	}
  113   
  114   	public byte writeByte(Object target, String name, byte oldValue, byte newValue) {
  115   		dirty();
  116   		intercept( target, name, new Byte( oldValue ) );
  117   		return newValue;
  118   	}
  119   
  120   	public char writeChar(Object target, String name, char oldValue, char newValue) {
  121   		dirty();
  122   		intercept( target, name, new Character( oldValue ) );
  123   		return newValue;
  124   	}
  125   
  126   	public double writeDouble(Object target, String name, double oldValue, double newValue) {
  127   		dirty();
  128   		intercept( target, name, new Double( oldValue ) );
  129   		return newValue;
  130   	}
  131   
  132   	public float writeFloat(Object target, String name, float oldValue, float newValue) {
  133   		dirty();
  134   		intercept( target, name, new Float( oldValue ) );
  135   		return newValue;
  136   	}
  137   
  138   	public int writeInt(Object target, String name, int oldValue, int newValue) {
  139   		dirty();
  140   		intercept( target, name, new Integer( oldValue ) );
  141   		return newValue;
  142   	}
  143   
  144   	public long writeLong(Object target, String name, long oldValue, long newValue) {
  145   		dirty();
  146   		intercept( target, name, new Long( oldValue ) );
  147   		return newValue;
  148   	}
  149   
  150   	public short writeShort(Object target, String name, short oldValue, short newValue) {
  151   		dirty();
  152   		intercept( target, name, new Short( oldValue ) );
  153   		return newValue;
  154   	}
  155   
  156   	public Object writeObject(Object target, String name, Object oldValue, Object newValue) {
  157   		dirty();
  158   		intercept( target, name, oldValue );
  159   		return newValue;
  160   	}
  161   
  162   	public String toString() {
  163   		return "FieldInterceptorImpl(" +
  164   			"entityName=" + getEntityName() +
  165   			",dirty=" + isDirty() +
  166   			",uninitializedFields=" + getUninitializedFields() +
  167   			')';
  168   	}
  169   
  170   }

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