org.codehaus.jackson.map.deser.BeanDeserializerFactory Maven / Gradle / Ivy

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Data Mapper package is a high-performance data binding package built on Jackson JSON processor
There is a newer version: 1.9.13
package org.codehaus.jackson.map.deser;

import java.lang.reflect.*;
import java.util.*;

import org.codehaus.jackson.JsonNode;
import org.codehaus.jackson.annotate.JsonAutoDetect.Visibility;
import org.codehaus.jackson.map.*;
import org.codehaus.jackson.map.introspect.*;
import org.codehaus.jackson.map.type.*;
import org.codehaus.jackson.map.util.ArrayBuilders;
import org.codehaus.jackson.map.util.ClassUtil;
import org.codehaus.jackson.type.JavaType;

/**
 * Concrete deserializer factory class that adds full Bean deserializer
 * construction logic using class introspection.
 *
 * Since there is no caching, this factory is stateless and a globally
 * shared singleton instance ({@link #instance}) can be  used by
 * {@link DeserializerProvider}s).
 */
public class BeanDeserializerFactory
    extends BasicDeserializerFactory
{
    /**
     * Signature of Throwable.initCause method.
     */
    private final static Class[] INIT_CAUSE_PARAMS = new Class[] { Throwable.class };

    /*
    /**********************************************************
    /* Config class implementation
    /**********************************************************
     */
    
    /**
     * Standard configuration settings container class implementation.
     * 
     * @since 1.7
     */
    public static class ConfigImpl extends Config
    {
        protected final static KeyDeserializers[] NO_KEY_DESERIALIZERS = new KeyDeserializers[0];
        protected final static BeanDeserializerModifier[] NO_MODIFIERS = new BeanDeserializerModifier[0];
        protected final static AbstractTypeResolver[] NO_ABSTRACT_TYPE_RESOLVERS = new AbstractTypeResolver[0];
        
        /**
         * List of providers for additional deserializers, checked before considering default
         * basic or bean deserializers.
         * 
         * @since 1.7
         */
        protected final Deserializers[] _additionalDeserializers;

        /**
         * List of providers for additional key deserializers, checked before considering
         * standard key deserializers.
         * 
         * @since 1.7
         */
        protected final KeyDeserializers[] _additionalKeyDeserializers;
        
        /**
         * List of modifiers that can change the way {@link BeanDeserializer} instances
         * are configured and constructed.
         */
        protected final BeanDeserializerModifier[] _modifiers;

        /**
         * List of objects that may be able to resolve abstract types to
         * concrete types. Used by functionality like "mr Bean" to materialize
         * types as needed.
         * 
         * @since 1.8
         */
        protected final AbstractTypeResolver[] _abstractTypeResolvers;
        
        /**
         * Constructor for creating basic configuration with no additional
         * handlers.
         */
        public ConfigImpl() {
            this(null, null, null, null);
        }

        /**
         * Copy-constructor that will create an instance that contains defined
         * set of additional deserializer providers.
         */
        protected ConfigImpl(Deserializers[] allAdditionalDeserializers,
                KeyDeserializers[] allAdditionalKeyDeserializers,
                BeanDeserializerModifier[] modifiers,
                AbstractTypeResolver[] atr)
        {
            _additionalDeserializers = (allAdditionalDeserializers == null) ?
                    NO_DESERIALIZERS : allAdditionalDeserializers;
            _additionalKeyDeserializers = (allAdditionalKeyDeserializers == null) ?
                    NO_KEY_DESERIALIZERS : allAdditionalKeyDeserializers;
            _modifiers = (modifiers == null) ? NO_MODIFIERS : modifiers;
            _abstractTypeResolvers = (atr == null) ? NO_ABSTRACT_TYPE_RESOLVERS : atr;
        }

        @Override
        public Config withAdditionalDeserializers(Deserializers additional)
        {
            if (additional == null) {
                throw new IllegalArgumentException("Can not pass null Deserializers");
            }
            Deserializers[] all = ArrayBuilders.insertInListNoDup(_additionalDeserializers, additional);
            return new ConfigImpl(all, _additionalKeyDeserializers, _modifiers, _abstractTypeResolvers);
        }

        @Override
        public Config withAdditionalKeyDeserializers(KeyDeserializers additional)
        {
            if (additional == null) {
                throw new IllegalArgumentException("Can not pass null KeyDeserializers");
            }
            KeyDeserializers[] all = ArrayBuilders.insertInListNoDup(_additionalKeyDeserializers, additional);
            return new ConfigImpl(_additionalDeserializers, all, _modifiers, _abstractTypeResolvers);
        }
        
        @Override
        public Config withDeserializerModifier(BeanDeserializerModifier modifier)
        {
            if (modifier == null) {
                throw new IllegalArgumentException("Can not pass null modifier");
            }
            BeanDeserializerModifier[] all = ArrayBuilders.insertInListNoDup(_modifiers, modifier);
            return new ConfigImpl(_additionalDeserializers, _additionalKeyDeserializers, all, _abstractTypeResolvers);
        }

        @Override
        public Config withAbstractTypeResolver(AbstractTypeResolver resolver)
        {
            if (resolver == null) {
                throw new IllegalArgumentException("Can not pass null resolver");
            }
            AbstractTypeResolver[] all = ArrayBuilders.insertInListNoDup(_abstractTypeResolvers, resolver);
            return new ConfigImpl(_additionalDeserializers, _additionalKeyDeserializers, _modifiers, all);
        }
        
        @Override
        public boolean hasDeserializers() { return _additionalDeserializers.length > 0; }

        @Override
        public boolean hasKeyDeserializers() { return _additionalKeyDeserializers.length > 0; }
        
        @Override
        public boolean hasDeserializerModifiers() { return _modifiers.length > 0; }

        @Override
        public boolean hasAbstractTypeResolvers() { return _abstractTypeResolvers.length > 0; }
        
        @Override
        public Iterable deserializers() {
            return ArrayBuilders.arrayAsIterable(_additionalDeserializers);
        }

        @Override
        public Iterable keyDeserializers() {
            return ArrayBuilders.arrayAsIterable(_additionalKeyDeserializers);
        }
        
        @Override
        public Iterable deserializerModifiers() {
            return ArrayBuilders.arrayAsIterable(_modifiers);
        }

        @Override
        public Iterable abstractTypeResolvers() {
            return ArrayBuilders.arrayAsIterable(_abstractTypeResolvers);
        }
    }
    
    /*
    /**********************************************************
    /* Life-cycle
    /**********************************************************
     */
    
    /**
     * Globally shareable thread-safe instance which has no additional custom deserializers
     * registered
     */
    public final static BeanDeserializerFactory instance = new BeanDeserializerFactory(null);

    /**
     * Configuration settings for this factory; immutable instance (just like this
     * factory), new version created via copy-constructor (fluent-style)
     * 
     * @since 1.7
     */
    protected final Config _factoryConfig;

    @Deprecated
    public BeanDeserializerFactory() {
        this(null);
    }

    /**
     * @since 1.7
     */
    public BeanDeserializerFactory(DeserializerFactory.Config config) {
        if (config == null) {
            config = new ConfigImpl();
        }
        _factoryConfig = config;
    }

    @Override
    public final Config getConfig() {
        return _factoryConfig;
    }
    
    /**
     * Method used by module registration functionality, to construct a new bean
     * deserializer factory
     * with different configuration settings.
     * 
     * @since 1.7
     */
    @Override
    public DeserializerFactory withConfig(DeserializerFactory.Config config)
    {
        if (_factoryConfig == config) {
            return this;
        }

        /* 22-Nov-2010, tatu: Handling of subtypes is tricky if we do immutable-with-copy-ctor;
         *    and we pretty much have to here either choose between losing subtype instance
         *    when registering additional deserializers, or losing deserializers.
         *    Instead, let's actually just throw an error if this method is called when subtype
         *    has not properly overridden this method; this to indicate problem as soon as possible.
         */
        if (getClass() != BeanDeserializerFactory.class) {
            throw new IllegalStateException("Subtype of BeanDeserializerFactory ("+getClass().getName()
                    +") has not properly overridden method 'withAdditionalDeserializers': can not instantiate subtype with "
                    +"additional deserializer definitions");
        }
        return new BeanDeserializerFactory(config);
    }
    
    /*
    /**********************************************************
    /* Overrides for super-class methods used for finding
    /* custom deserializers
    /**********************************************************
     */

    @Override
    public KeyDeserializer createKeyDeserializer(DeserializationConfig config, JavaType type,
            BeanProperty property)
        throws JsonMappingException
    {
        if (_factoryConfig.hasKeyDeserializers()) {
            BasicBeanDescription beanDesc = config.introspectClassAnnotations(type.getRawClass());
            for (KeyDeserializers d  : _factoryConfig.keyDeserializers()) {
                KeyDeserializer deser = d.findKeyDeserializer(type, config, beanDesc, property);
                if (deser != null) {
                    return deser;
                }
            }
        }
        return null;
    }
    
    @Override
    protected JsonDeserializer _findCustomArrayDeserializer(ArrayType type, DeserializationConfig config,
            DeserializerProvider provider,
            BeanProperty property,
            TypeDeserializer elementTypeDeserializer, JsonDeserializer elementDeserializer)
        throws JsonMappingException
    {
        for (Deserializers d  : _factoryConfig.deserializers()) {
            JsonDeserializer deser = d.findArrayDeserializer(type, config, provider, property,
                        elementTypeDeserializer, elementDeserializer);
            if (deser != null) {
                return deser;
            }
        }
        return null;
    }

    @Override
    protected JsonDeserializer _findCustomCollectionDeserializer(CollectionType type, DeserializationConfig config,
            DeserializerProvider provider, BasicBeanDescription beanDesc,
            BeanProperty property,
            TypeDeserializer elementTypeDeserializer, JsonDeserializer elementDeserializer)
        throws JsonMappingException
    {
        for (Deserializers d  : _factoryConfig.deserializers()) {
            JsonDeserializer deser = d.findCollectionDeserializer(type, config, provider, beanDesc, property,
                    elementTypeDeserializer, elementDeserializer);
            if (deser != null) {
                return deser;
            }
        }
        return null;
    }

    @Override
    protected JsonDeserializer _findCustomCollectionLikeDeserializer(CollectionLikeType type, DeserializationConfig config,
            DeserializerProvider provider, BasicBeanDescription beanDesc,
            BeanProperty property,
            TypeDeserializer elementTypeDeserializer, JsonDeserializer elementDeserializer)
        throws JsonMappingException
    {
        for (Deserializers d  : _factoryConfig.deserializers()) {
            JsonDeserializer deser = d.findCollectionLikeDeserializer(type, config, provider, beanDesc, property,
                    elementTypeDeserializer, elementDeserializer);
            if (deser != null) {
                return deser;
            }
        }
        return null;
    }
    
    @Override
    protected JsonDeserializer _findCustomEnumDeserializer(Class type, DeserializationConfig config,
            BasicBeanDescription beanDesc, BeanProperty property)
        throws JsonMappingException
    {
        for (Deserializers d  : _factoryConfig.deserializers()) {
            JsonDeserializer deser = d.findEnumDeserializer(type, config, beanDesc, property);
            if (deser != null) {
                return deser;
            }
        }
        return null;
    }

    @Override
    protected JsonDeserializer _findCustomMapDeserializer(MapType type,
            DeserializationConfig config,
            DeserializerProvider provider, BasicBeanDescription beanDesc, BeanProperty property,
            KeyDeserializer keyDeserializer,
            TypeDeserializer elementTypeDeserializer, JsonDeserializer elementDeserializer)
        throws JsonMappingException
    {
        for (Deserializers d  : _factoryConfig.deserializers()) {
            JsonDeserializer deser = d.findMapDeserializer(type, config, provider, beanDesc, property,
                    keyDeserializer, elementTypeDeserializer, elementDeserializer);
            if (deser != null) {
                return deser;
            }
        }
        return null;
    }

    @Override
    protected JsonDeserializer _findCustomMapLikeDeserializer(MapLikeType type,
            DeserializationConfig config,
            DeserializerProvider provider, BasicBeanDescription beanDesc, BeanProperty property,
            KeyDeserializer keyDeserializer,
            TypeDeserializer elementTypeDeserializer, JsonDeserializer elementDeserializer)
        throws JsonMappingException
    {
        for (Deserializers d  : _factoryConfig.deserializers()) {
            JsonDeserializer deser = d.findMapLikeDeserializer(type, config, provider, beanDesc, property,
                    keyDeserializer, elementTypeDeserializer, elementDeserializer);
            if (deser != null) {
                return deser;
            }
        }
        return null;
    }
    
    @Override
    protected JsonDeserializer _findCustomTreeNodeDeserializer(Class type,
            DeserializationConfig config, BeanProperty property)
        throws JsonMappingException
    {
        for (Deserializers d  : _factoryConfig.deserializers()) {
            JsonDeserializer deser = d.findTreeNodeDeserializer(type, config, property);
            if (deser != null) {
                return deser;
            }
        }
        return null;
    }

    // Note: NOT overriding, superclass has no matching method
    @SuppressWarnings("unchecked")
    protected JsonDeserializer