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Java library with basic graph implementations
/**
* Copyright (C) 2014-2016 Philip Helger (www.helger.com)
* philip[at]helger[dot]com
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.helger.graph.impl;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import javax.annotation.concurrent.NotThreadSafe;
import com.helger.commons.annotation.Nonempty;
import com.helger.commons.collection.attr.MapBasedAttributeContainerAny;
import com.helger.commons.hashcode.HashCodeGenerator;
import com.helger.commons.string.StringHelper;
import com.helger.commons.string.ToStringGenerator;
import com.helger.graph.IMutableBaseGraphObject;
/**
* Base class for graph nodes and graph relations.
*
* @author Philip Helger
*/
@NotThreadSafe
public abstract class AbstractBaseGraphObject extends MapBasedAttributeContainerAny
implements IMutableBaseGraphObject
{
private final String m_sID;
/**
* Constructor
*
* @param sID
* If null
a new ID is generated by the
* {@link GraphObjectIDFactory}.
*/
public AbstractBaseGraphObject (@Nullable final String sID)
{
if (StringHelper.hasNoText (sID))
m_sID = GraphObjectIDFactory.createNewGraphObjectID ();
else
m_sID = sID;
}
@Nonnull
@Nonempty
public final String getID ()
{
return m_sID;
}
@Override
public boolean equals (final Object o)
{
if (o == this)
return true;
if (!super.equals (o))
return false;
final AbstractBaseGraphObject rhs = (AbstractBaseGraphObject) o;
return m_sID.equals (rhs.m_sID);
}
@Override
public int hashCode ()
{
return HashCodeGenerator.getDerived (super.hashCode ()).append (m_sID).getHashCode ();
}
@Override
public String toString ()
{
return ToStringGenerator.getDerived (super.toString ()).append ("id", m_sID).toString ();
}
}
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