SquirrelJME/SquirrelJME

// -*- Mode: Java; indent-tabs-mode: t; tab-width: 4 -*-
// ---------------------------------------------------------------------------
// SquirrelJME
//     Copyright (C) Stephanie Gawroriski <xer@multiphasicapps.net>
// ---------------------------------------------------------------------------
// SquirrelJME is under the Mozilla Public License Version 2.0.
// See license.mkd for licensing and copyright information.
// ---------------------------------------------------------------------------

package cc.squirreljme.jvm.suite;

import java.lang.ref.Reference;
import java.lang.ref.WeakReference;
import java.util.Objects;

/**
 * This represents a profile that may be implemented, such as MIDP.
 *
 * @since 2016/12/14
 */
public final class Profile
    implements Comparable<Profile>, MarkedDependency, MarkedProvided
{
    /** Name. */
    protected final APIName name;
    
    /** Version. */
    protected final SuiteVersion version;
    
    /** String representation. */
    private Reference<String> _string;
    
    /**
     * Initializes the profile using the given API name and version.
     *
     * @param __n The name to use.
     * @param __v The version of the suite, this is optional.
     * @throws NullPointerException If no name was specified.
     * @since 2017/11/30
     */
    public Profile(APIName __n, SuiteVersion __v)
        throws NullPointerException
    {
        if (__n == null)
            throw new NullPointerException("NARG");
        
        this.name = __n;
        this.version = __v;
    }
    
    /**
     * Initializes the profile by parsing the given string.
     *
     * @param __n The string to parse.
     * @throws NullPointerException On null arguments.
     * @since 2017/11/30
     */
    public Profile(String __n)
        throws NullPointerException
    {
        if (__n == null)
            throw new NullPointerException("NARG");
        
        // No version specified
        int n = __n.length(),
            dx = __n.lastIndexOf('-');
        char c;
        if (dx < 0 || dx + 1 >= n || (c = __n.charAt(dx + 1)) < '0' || c > '9')
        {
            this.name = new APIName(__n);
            this.version = null;
        }
        
        // There is a version
        else
        {
            this.name = new APIName(__n.substring(0, dx));
            this.version = new SuiteVersion(__n.substring(dx + 1));
        }
    }
    
    /**
     * Returns the API name.
     * 
     * @return The API name.
     * @since 2022/02/28
     */
    public APIName apiName()
    {
        return this.name;
    }
    
    /**
     * {@inheritDoc}
     * @since 2017/11/30
     */
    @Override
    public int compareTo(Profile __o)
    {
        int rv = this.name.compareTo(__o.name);
        if (rv != 0)
            return rv;
        
        SuiteVersion a = this.version,
            b = __o.version;
        if ((a == null) != (b == null))
            return (a == null ? -1 : 1);
        else if (a != null)
            return a.compareTo(b);
        return 0;
    }
    
    /**
     * {@inheritDoc}
     * @since 2017/11/30
     */
    @Override
    public boolean equals(Object __o)
    {
        if (this == __o)
            return true;
        
        if (!(__o instanceof Profile))
            return false;
        
        Profile o = (Profile)__o;
        return this.name.equals(o.name) &&
            Objects.equals(this.version, o.version);
    }
    
    /**
     * {@inheritDoc}
     * @since 2017/11/30
     */
    @Override
    public int hashCode()
    {
        return this.name.hashCode() ^
            Objects.hashCode(this.version);
    }
    
    /**
     * {@inheritDoc}
     * @since 2017/12/31
     */
    @Override
    public boolean isOptional()
    {
        return false;
    }
    
    /**
     * {@inheritDoc}
     * @since 2017/12/31
     */
    @Override
    public boolean matchesProvided(MarkedProvided __mp)
        throws NullPointerException
    {
        if (__mp == null)
            throw new NullPointerException("NARG");
        
        return this.equals(__mp);
    }
    
    /**
     * {@inheritDoc}
     * @since 2017/11/30
     */
    @Override
    public String toString()
    {
        
        Reference<String> ref = this._string;
        String rv;
        
        if (ref == null || null == (rv = ref.get()))
            this._string = new WeakReference<>((rv = "Profile " +
                this.name + ":" + this.version));
        
        return rv;
    }
    
    /**
     * Returns the version of this profile.
     *
     * @return The profile version.
     * @since 2017/12/05
     */
    public SuiteVersion version()
    {
        return this.version;
    }
}