001 /***************************************************************************** 002 * Copyright (C) PicoContainer Organization. All rights reserved. * 003 * ------------------------------------------------------------------------- * 004 * The software in this package is published under the terms of the BSD * 005 * style license a copy of which has been included with this distribution in * 006 * the LICENSE.txt file. * 007 *****************************************************************************/ 008 009 package org.picocontainer.gems.constraints; 010 011 import org.picocontainer.ComponentAdapter; 012 013 /** 014 * Constraint that accepts an adapter whose implementation is either the 015 * same type or a subtype of the type(s) represented by this object. 016 * 017 * @author Nick Sieger 018 */ 019 @SuppressWarnings("serial") 020 public final class IsType extends AbstractConstraint { 021 private final Class type; 022 023 /** 024 * Creates a new <code>IsType</code> instance. 025 * 026 * @param c the <code>Class</code> to match 027 */ 028 public IsType(final Class c) { 029 this.type = c; 030 } 031 032 @Override 033 public boolean evaluate(final ComponentAdapter adapter) { 034 return type.isAssignableFrom(adapter.getComponentImplementation()); 035 } 036 037 }