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/*
* Copyright (c) 2008-2013 Eike Stepper (Berlin, Germany) and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Eike Stepper - initial API and implementation
*/
package org.eclipse.emf.cdo.internal.common.id;
import org.eclipse.emf.cdo.common.id.CDOID;
import org.eclipse.emf.cdo.common.id.CDOIDTemp;
import org.eclipse.emf.cdo.common.protocol.CDODataInput;
import org.eclipse.emf.cdo.common.protocol.CDODataOutput;
import org.eclipse.emf.cdo.spi.common.id.AbstractCDOID;
import org.eclipse.net4j.util.CheckUtil;
import org.eclipse.net4j.util.ObjectUtil;
import org.eclipse.net4j.util.ref.Interner;
import java.io.IOException;
/**
* @author Eike Stepper
* @since 2.0
*/
public final class CDOIDTempObjectImpl extends AbstractCDOID implements CDOIDTemp
{
private static final long serialVersionUID = 1L;
private static final IntInterner INTERNER = new IntInterner();
private final int value;
private CDOIDTempObjectImpl(int value)
{
CheckUtil.checkArg(value != 0, "Zero not allowed");
this.value = value;
}
/**
* A private default constructor for technologies (such as Hessian) that initialize the instance fields via reflection.
* Note that {@link #readResolve()} must be called in any case to ensure value uniqueness.
*/
private CDOIDTempObjectImpl()
{
value = 0;
}
public int getIntValue()
{
return value;
}
@Override
public void write(CDODataOutput out) throws IOException
{
out.writeInt(value);
}
public String toURIFragment()
{
return String.valueOf(value);
}
public Type getType()
{
return Type.TEMP_OBJECT;
}
public boolean isExternal()
{
return false;
}
public boolean isObject()
{
return true;
}
public boolean isTemporary()
{
return true;
}
@Override
public int hashCode()
{
return ObjectUtil.hashCode(value);
}
@Override
public String toString()
{
return "oid" + value; //$NON-NLS-1$
}
@Override
protected int doCompareTo(CDOID o) throws ClassCastException
{
CDOIDTempObjectImpl that = (CDOIDTempObjectImpl)o;
if (value < that.value)
{
return -1;
}
if (value > that.value)
{
return 1;
}
return 0;
}
private static int getHashCode(int value)
{
return value;
}
public static CDOIDTempObjectImpl create(int value)
{
return INTERNER.intern(value);
}
public static CDOIDTempObjectImpl create(CDODataInput in) throws IOException
{
int value = in.readInt();
return create(value);
}
public static CDOIDTempObjectImpl create(String fragmentPart)
{
int value = Integer.parseInt(fragmentPart);
return create(value);
}
/**
* @author Eike Stepper
*/
private static final class IntInterner extends Interner<CDOIDTempObjectImpl>
{
public synchronized CDOIDTempObjectImpl intern(int value)
{
int hashCode = getHashCode(value);
for (Entry<CDOIDTempObjectImpl> entry = getEntry(hashCode); entry != null; entry = entry.getNextEntry())
{
CDOIDTempObjectImpl id = entry.get();
if (id != null && id.value == value)
{
return id;
}
}
CDOIDTempObjectImpl id = new CDOIDTempObjectImpl(value);
addEntry(createEntry(id, hashCode));
return id;
}
@Override
protected int hashCode(CDOIDTempObjectImpl id)
{
return getHashCode(id.value);
}
}
}
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