1/* 2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26package com.sun.xml.internal.bind.api; 27 28import java.lang.annotation.Annotation; 29import java.lang.reflect.Type; 30import java.util.Arrays; 31import java.util.Collection; 32 33import javax.xml.namespace.QName; 34 35/** 36 * A reference to a JAXB-bound type. 37 * 38 * <p> 39 * <b>Subject to change without notice</b>. 40 * 41 * @since 2.0 EA1 42 * @author Kohsuke Kawaguchi 43 */ 44public final class TypeReference { 45 46 /** 47 * The associated XML element name that the JAX-RPC uses with this type reference. 48 * 49 * Always non-null. Strings are interned. 50 */ 51 public final QName tagName; 52 53 /** 54 * The Java type that's being referenced. 55 * 56 * Always non-null. 57 */ 58 public final Type type; 59 60 /** 61 * The annotations associated with the reference of this type. 62 * 63 * Always non-null. 64 */ 65 public final Annotation[] annotations; 66 67 public TypeReference(QName tagName, Type type, Annotation... annotations) { 68 if(tagName==null || type==null || annotations==null) { 69 String nullArgs = ""; 70 71 if(tagName == null) nullArgs = "tagName"; 72 if(type == null) nullArgs += (nullArgs.length() > 0 ? ", type" : "type"); 73 if(annotations == null) nullArgs += (nullArgs.length() > 0 ? ", annotations" : "annotations"); 74 75 Messages.ARGUMENT_CANT_BE_NULL.format(nullArgs); 76 77 throw new IllegalArgumentException(Messages.ARGUMENT_CANT_BE_NULL.format(nullArgs)); 78 } 79 80 this.tagName = new QName(tagName.getNamespaceURI().intern(), tagName.getLocalPart().intern(), tagName.getPrefix()); 81 this.type = type; 82 this.annotations = annotations; 83 } 84 85 /** 86 * Finds the specified annotation from the array and returns it. 87 * Null if not found. 88 */ 89 public <A extends Annotation> A get( Class<A> annotationType ) { 90 for (Annotation a : annotations) { 91 if(a.annotationType()==annotationType) 92 return annotationType.cast(a); 93 } 94 return null; 95 } 96 97 /** 98 * Creates a {@link TypeReference} for the item type, 99 * if this {@link TypeReference} represents a collection type. 100 * Otherwise returns an identical type. 101 */ 102 public TypeReference toItemType() { 103 // if we are to reinstitute this check, check JAXB annotations only 104 // assert annotations.length==0; // not designed to work with adapters. 105 106 Type base = Utils.REFLECTION_NAVIGATOR.getBaseClass(type, Collection.class); 107 if(base==null) 108 return this; // not a collection 109 110 return new TypeReference(tagName, Utils.REFLECTION_NAVIGATOR.getTypeArgument(base,0)); 111 } 112 113 @Override 114 public boolean equals(Object o) { 115 if (this == o) return true; 116 if (o == null || getClass() != o.getClass()) return false; 117 118 TypeReference that = (TypeReference) o; 119 120 if (!Arrays.equals(annotations, that.annotations)) return false; 121 if (!tagName.equals(that.tagName)) return false; 122 if (!type.equals(that.type)) return false; 123 124 return true; 125 } 126 127 @Override 128 public int hashCode() { 129 int result = tagName.hashCode(); 130 result = 31 * result + type.hashCode(); 131 result = 31 * result + Arrays.hashCode(annotations); 132 return result; 133 } 134} 135