001 /*
002 GRANITE DATA SERVICES
003 Copyright (C) 2011 GRANITE DATA SERVICES S.A.S.
004
005 This file is part of Granite Data Services.
006
007 Granite Data Services is free software; you can redistribute it and/or modify
008 it under the terms of the GNU Library General Public License as published by
009 the Free Software Foundation; either version 2 of the License, or (at your
010 option) any later version.
011
012 Granite Data Services is distributed in the hope that it will be useful, but
013 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
014 FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License
015 for more details.
016
017 You should have received a copy of the GNU Library General Public License
018 along with this library; if not, see <http://www.gnu.org/licenses/>.
019 */
020
021 package org.granite.messaging.amf.io.util;
022
023 import java.io.Externalizable;
024 import java.util.List;
025 import java.util.Map;
026
027 import org.granite.config.GraniteConfig;
028 import org.granite.context.GraniteContext;
029 import org.granite.messaging.amf.RemoteClass;
030 import org.granite.messaging.amf.io.convert.Converters;
031 import org.granite.messaging.amf.io.util.externalizer.Externalizer;
032
033 /**
034 * @author Franck WOLFF
035 */
036 public abstract class JavaClassDescriptor {
037
038 protected final Class<?> type;
039 protected final String name;
040 protected final Externalizer externalizer;
041 protected final Converters converters;
042 protected final byte encoding;
043 protected final List<Property> properties;
044
045 protected JavaClassDescriptor(Class<?> type) {
046 GraniteConfig config = GraniteContext.getCurrentInstance().getGraniteConfig();
047 this.type = type;
048 this.name = getClassName(type);
049 this.externalizer = config.getExternalizer(type.getName());
050 this.converters = config.getConverters();
051 this.encoding = findEncoding(type);
052 this.properties = introspectProperties();
053 }
054
055 private byte findEncoding(Class<?> type) {
056 if (externalizer != null || Externalizable.class.isAssignableFrom(type))
057 return 0x01;
058 if (Map.class.isAssignableFrom(type))
059 return 0x02;
060 return 0x00;
061 }
062
063 protected abstract List<Property> introspectProperties();
064
065 public static String getClassName(Class<?> clazz) {
066 if (Map.class.isAssignableFrom(clazz) && !Externalizable.class.isAssignableFrom(clazz)) {
067 Externalizer externalizer = GraniteContext.getCurrentInstance().getGraniteConfig().getExternalizer(clazz.getName());
068 if (externalizer == null)
069 return "";
070 }
071 RemoteClass alias = clazz.getAnnotation(RemoteClass.class);
072 return alias != null ? alias.value() : clazz.getName();
073 }
074
075 public Class<?> getType() {
076 return type;
077 }
078
079 public String getName() {
080 return name;
081 }
082
083 public Externalizer getExternalizer() {
084 return externalizer;
085 }
086
087 public byte getEncoding() {
088 return encoding;
089 }
090
091 public boolean isExternalizable() {
092 return encoding == 0x01;
093 }
094
095 public boolean isDynamic() {
096 return encoding == 0x02;
097 }
098
099 public int getPropertiesCount() {
100 return (properties != null ? properties.size() : 0);
101 }
102
103 public String getPropertyName(int index) {
104 if (properties == null)
105 throw new ArrayIndexOutOfBoundsException(index);
106 return properties.get(index).getName();
107 }
108
109 public Object getPropertyValue(int index, Object instance) {
110 if (properties == null)
111 throw new ArrayIndexOutOfBoundsException(index);
112 Property prop = properties.get(index);
113 return prop.getProperty(instance);
114 }
115 }