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package org.bouncycastle.util.io.pem;

/**
 * Class representing a PEM header (name, value) pair.
 */
public class PemHeader
{
    private String name;
    private String value;

    /**
     * Base constructor.
     *
     * @param name name of the header property.
     * @param value value of the header property.
     */
    public PemHeader(String name, String value)
    {
        this.name = name;
        this.value = value;
    }

    public String getName()
    {
        return name;
    }

    public String getValue()
    {
        return value;
    }

    public int hashCode()
    {
        return getHashCode(this.name) + 31 * getHashCode(this.value);    
    }

    public boolean equals(Object o)
    {
        if (!(o instanceof PemHeader))
        {
            return false;
        }

        PemHeader other = (PemHeader)o;

        return other == this || (isEqual(this.name, other.name) && isEqual(this.value, other.value));
    }

    private int getHashCode(String s)
    {
        if (s == null)
        {
            return 1;
        }

        return s.hashCode();
    }

    private boolean isEqual(String s1, String s2)
    {
        if (s1 == s2)
        {
            return true;
        }

        if (s1 == null || s2 == null)
        {
            return false;
        }

        return s1.equals(s2);
    }

}