001/**
002 *   GRANITE DATA SERVICES
003 *   Copyright (C) 2006-2013 GRANITE DATA SERVICES S.A.S.
004 *
005 *   This file is part of the Granite Data Services Platform.
006 *
007 *   Granite Data Services is free software; you can redistribute it and/or
008 *   modify it under the terms of the GNU Lesser General Public
009 *   License as published by the Free Software Foundation; either
010 *   version 2.1 of the License, or (at your option) any later version.
011 *
012 *   Granite Data Services is distributed in the hope that it will be useful,
013 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
014 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
015 *   General Public License for more details.
016 *
017 *   You should have received a copy of the GNU Lesser General Public
018 *   License along with this library; if not, write to the Free Software
019 *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
020 *   USA, or see <http://www.gnu.org/licenses/>.
021 */
022package org.granite.messaging.amf.io.util;
023
024import java.io.Externalizable;
025import java.util.List;
026import java.util.Map;
027
028import org.granite.config.GraniteConfig;
029import org.granite.context.GraniteContext;
030import org.granite.messaging.amf.io.convert.Converters;
031import org.granite.messaging.amf.io.util.externalizer.Externalizer;
032
033/**
034 * @author Franck WOLFF
035 */
036public 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        return GraniteContext.getCurrentInstance().getGraniteConfig().getAliasRegistry().getAliasForType(clazz.getName());
072    }
073    
074    public Class<?> getType() {
075        return type;
076    }
077
078    public String getName() {
079        return name;
080    }
081
082    public Externalizer getExternalizer() {
083        return externalizer;
084    }
085
086    public byte getEncoding() {
087        return encoding;
088    }
089
090    public boolean isExternalizable() {
091        return encoding == 0x01;
092    }
093
094    public boolean isDynamic() {
095        return encoding == 0x02;
096    }
097
098    public int getPropertiesCount() {
099        return (properties != null ? properties.size() : 0);
100    }
101
102    public Property getProperty(int index) {
103        if (properties == null)
104            throw new ArrayIndexOutOfBoundsException(index);
105        return properties.get(index);
106    }
107    
108    public String getPropertyName(int index) {
109        if (properties == null)
110            throw new ArrayIndexOutOfBoundsException(index);
111        return properties.get(index).getName();
112    }
113
114    public Object getPropertyValue(int index, Object instance) {
115        if (properties == null)
116            throw new ArrayIndexOutOfBoundsException(index);
117        Property prop = properties.get(index);
118        return prop.getProperty(instance);
119    }
120}