io.quarkus.launcher.shaded.org.eclipse.sisu.plexus.RequirementImpl Maven / Gradle / Ivy

/*******************************************************************************
 * Copyright (c) 2010, 2015 Sonatype, Inc.
 * 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:
 *    Stuart McCulloch (Sonatype, Inc.) - initial API and implementation
 *******************************************************************************/
package org.eclipse.sisu.plexus;

import java.lang.annotation.Annotation;
import java.util.Arrays;
import java.util.List;

import org.codehaus.plexus.component.annotations.Requirement;
import org.eclipse.sisu.inject.DeferredClass;
import org.eclipse.sisu.space.LoadedClass;

/**
 * Runtime implementation of Plexus @{@link Requirement} annotation.
 */
public final class RequirementImpl
    implements Requirement
{
    // ----------------------------------------------------------------------
    // Implementation fields
    // ----------------------------------------------------------------------

    private final DeferredClass role;

    private final boolean optional;

    private final String hint;

    private final String[] hints;

    // ----------------------------------------------------------------------
    // Constructors
    // ----------------------------------------------------------------------

    public RequirementImpl( final DeferredClass role, final boolean optional, final List hints )
    {
        if ( null == role || null == hints || hints.contains( null ) )
        {
            throw new IllegalArgumentException( "@Requirement cannot contain null values" );
        }

        this.role = role;
        this.optional = optional;

        final int length = hints.size();
        if ( length == 0 )
        {
            hint = "";
            this.hints = Hints.NO_HINTS;
        }
        else if ( length == 1 )
        {
            hint = hints.get( 0 );
            this.hints = Hints.NO_HINTS;
        }
        else
        {
            hint = "";
            this.hints = hints.toArray( new String[length] );
        }
    }

    /**
     * For testing purposes only.
     */
    @Deprecated
    public RequirementImpl( final Class role, final boolean optional, final String... hints )
    {
        this( new LoadedClass