org.jgrapht.nio.DefaultAttribute Maven / Gradle / Ivy
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/*
* (C) Copyright 2017-2023, by Dimitrios Michail and Contributors.
*
* JGraphT : a free Java graph-theory library
*
* See the CONTRIBUTORS.md file distributed with this work for additional
* information regarding copyright ownership.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0, or the
* GNU Lesser General Public License v2.1 or later
* which is available at
* http://www.gnu.org/licenses/old-licenses/lgpl-2.1-standalone.html.
*
* SPDX-License-Identifier: EPL-2.0 OR LGPL-2.1-or-later
*/
package org.jgrapht.nio;
import java.io.*;
/**
* Default implementation of an attribute.
*
* @param the underlying type
*
* @author Dimitrios Michail
*/
public class DefaultAttribute
implements Attribute, Serializable
{
private static final long serialVersionUID = 366113727410278952L;
/**
* The null attribute.
*/
public static final Attribute NULL = new DefaultAttribute<>(null, AttributeType.NULL);
private T value;
private AttributeType type;
/**
* Create a new attribute
*
* @param value the value
* @param type the type
*/
public DefaultAttribute(T value, AttributeType type)
{
this.value = value;
this.type = type;
}
/**
* Get the string value of the attribute
*
* @return the string value of the attribute
*/
@Override
public String getValue()
{
return String.valueOf(value);
}
@Override
public String toString()
{
return String.valueOf(value);
}
/**
* Get the type of the attribute
*
* @return the type of the attribute
*/
@Override
public AttributeType getType()
{
return type;
}
/**
* Create a boolean attribute
*
* @param value the value
* @return the attribute
*/
public static Attribute createAttribute(Boolean value)
{
return new DefaultAttribute<>(value, AttributeType.BOOLEAN);
}
/**
* Create an integer attribute
*
* @param value the value
* @return the attribute
*/
public static Attribute createAttribute(Integer value)
{
return new DefaultAttribute<>(value, AttributeType.INT);
}
/**
* Create a long attribute
*
* @param value the value
* @return the attribute
*/
public static Attribute createAttribute(Long value)
{
return new DefaultAttribute<>(value, AttributeType.LONG);
}
/**
* Create a float attribute
*
* @param value the value
* @return the attribute
*/
public static Attribute createAttribute(Float value)
{
return new DefaultAttribute<>(value, AttributeType.FLOAT);
}
/**
* Create a double attribute
*
* @param value the value
* @return the attribute
*/
public static Attribute createAttribute(Double value)
{
return new DefaultAttribute<>(value, AttributeType.DOUBLE);
}
/**
* Create a string attribute
*
* @param value the value
* @return the attribute
*/
public static Attribute createAttribute(String value)
{
return new DefaultAttribute<>(value, AttributeType.STRING);
}
@Override
public int hashCode()
{
final int prime = 31;
int result = 1;
result = prime * result + ((type == null) ? 0 : type.hashCode());
result = prime * result + ((value == null) ? 0 : value.hashCode());
return result;
}
@Override
@SuppressWarnings("rawtypes")
public boolean equals(Object obj)
{
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
DefaultAttribute other = (DefaultAttribute) obj;
if (type != other.type)
return false;
if (value == null) {
if (other.value != null)
return false;
} else if (!value.equals(other.value))
return false;
return true;
}
}
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