001/** 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.apache.camel.impl.scan; 018 019import java.util.HashSet; 020import java.util.Set; 021 022import org.apache.camel.spi.PackageScanFilter; 023 024/** 025 * Package scan filter for testing if a given class is assignable to another class. 026 */ 027public class AssignableToPackageScanFilter implements PackageScanFilter { 028 private final Set<Class<?>> parents = new HashSet<Class<?>>(); 029 030 public AssignableToPackageScanFilter() { 031 } 032 033 public AssignableToPackageScanFilter(Class<?> parentType) { 034 parents.add(parentType); 035 } 036 037 public AssignableToPackageScanFilter(Set<Class<?>> parents) { 038 this.parents.addAll(parents); 039 } 040 041 public void addParentType(Class<?> parentType) { 042 parents.add(parentType); 043 } 044 045 public boolean matches(Class<?> type) { 046 if (parents != null && parents.size() > 0) { 047 for (Class<?> parent : parents) { 048 if (parent.isAssignableFrom(type)) { 049 return true; 050 } 051 } 052 } 053 return false; 054 } 055 056 @Override 057 public String toString() { 058 StringBuilder sb = new StringBuilder(); 059 for (Class<?> parent : parents) { 060 sb.append(parent.getSimpleName()).append(", "); 061 } 062 sb.setLength(sb.length() > 0 ? sb.length() - 2 : 0); 063 return "is assignable to any of " + sb; 064 } 065}