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/*
* Copyright (c) 2009-2013 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.protocol.CDODataInput;
import org.eclipse.emf.cdo.common.protocol.CDODataOutput;
import org.eclipse.emf.cdo.spi.common.id.AbstractCDOID;
import org.eclipse.emf.cdo.spi.common.id.InternalCDOIDObject;
import org.eclipse.net4j.util.CheckUtil;
import org.eclipse.net4j.util.ObjectUtil;
import org.eclipse.net4j.util.ref.Interner;
import java.io.IOException;
import java.io.ObjectStreamException;
/**
* @author Eike Stepper
* @since 2.0
*/
public final class CDOIDObjectLongImpl extends AbstractCDOID implements InternalCDOIDObject
{
private static final long serialVersionUID = 1L;
private static final LongInterner INTERNER = new LongInterner();
private final long value;
private CDOIDObjectLongImpl(long value)
{
CheckUtil.checkArg(value != 0L, "Zero not allowed");
this.value = value;
}
public long getLongValue()
{
return value;
}
@Override
public void write(CDODataOutput out) throws IOException
{
out.writeLong(value);
}
public String toURIFragment()
{
return String.valueOf(value);
}
public Type getType()
{
return Type.OBJECT;
}
public boolean isExternal()
{
return false;
}
public boolean isObject()
{
return true;
}
public boolean isTemporary()
{
return false;
}
/**
* @since 3.0
*/
public CDOID.ObjectType getSubType()
{
return CDOID.ObjectType.LONG;
}
@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
{
return new Long(value).compareTo(((CDOIDObjectLongImpl)o).value);
}
private Object readResolve() throws ObjectStreamException
{
return create(value);
}
private static int getHashCode(long value)
{
return ObjectUtil.hashCode(value);
}
public static CDOIDObjectLongImpl create(long value)
{
return INTERNER.intern(value);
}
public static CDOIDObjectLongImpl create(CDODataInput in) throws IOException
{
long value = in.readLong();
return create(value);
}
public static CDOIDObjectLongImpl create(String fragmentPart)
{
long value = Long.parseLong(fragmentPart);
return create(value);
}
/**
* @author Eike Stepper
*/
private static final class LongInterner extends Interner<CDOIDObjectLongImpl>
{
public synchronized CDOIDObjectLongImpl intern(long value)
{
int hashCode = getHashCode(value);
for (Entry<CDOIDObjectLongImpl> entry = getEntry(hashCode); entry != null; entry = entry.getNextEntry())
{
CDOIDObjectLongImpl id = entry.get();
if (id != null && id.value == value)
{
return id;
}
}
CDOIDObjectLongImpl id = new CDOIDObjectLongImpl(value);
addEntry(createEntry(id, hashCode));
return id;
}
@Override
protected int hashCode(CDOIDObjectLongImpl id)
{
return getHashCode(id.value);
}
}
}
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