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com.fasterxml.jackson.databind.deser.SettableAnyProperty Maven / Gradle / Ivy
General data-binding functionality for Jackson: works on core streaming API
package com.fasterxml.jackson.databind.deser;
import java.io.IOException;
import java.util.Map;
import com.fasterxml.jackson.core.*;
import com.fasterxml.jackson.databind.*;
import com.fasterxml.jackson.databind.deser.impl.ReadableObjectId.Referring;
import com.fasterxml.jackson.databind.introspect.AnnotatedField;
import com.fasterxml.jackson.databind.introspect.AnnotatedMember;
import com.fasterxml.jackson.databind.introspect.AnnotatedMethod;
import com.fasterxml.jackson.databind.jsontype.TypeDeserializer;
import com.fasterxml.jackson.databind.util.ClassUtil;
/**
* Class that represents a "wildcard" set method which can be used
* to generically set values of otherwise unmapped (aka "unknown")
* properties read from Json content.
*
* !!! Note: might make sense to refactor to share some code
* with {@link SettableBeanProperty}?
*/
public class SettableAnyProperty
implements java.io.Serializable
{
private static final long serialVersionUID = 1L;
/**
* Method used for setting "any" properties, along with annotation
* information. Retained to allow contextualization of any properties.
*/
protected final BeanProperty _property;
/**
* Annotated variant is needed for JDK serialization only
*/
final protected AnnotatedMember _setter;
final boolean _setterIsField;
protected final JavaType _type;
protected JsonDeserializer _valueDeserializer;
protected final TypeDeserializer _valueTypeDeserializer;
/**
* @since 2.9
*/
protected final KeyDeserializer _keyDeserializer;
/*
/**********************************************************
/* Life-cycle
/**********************************************************
*/
public SettableAnyProperty(BeanProperty property, AnnotatedMember setter, JavaType type,
KeyDeserializer keyDeser,
JsonDeserializer valueDeser, TypeDeserializer typeDeser)
{
_property = property;
_setter = setter;
_type = type;
_valueDeserializer = valueDeser;
_valueTypeDeserializer = typeDeser;
_keyDeserializer = keyDeser;
_setterIsField = setter instanceof AnnotatedField;
}
@Deprecated // since 2.9
public SettableAnyProperty(BeanProperty property, AnnotatedMember setter, JavaType type,
JsonDeserializer valueDeser, TypeDeserializer typeDeser)
{
this(property, setter, type, null, valueDeser, typeDeser);
}
public SettableAnyProperty withValueDeserializer(JsonDeserializer deser) {
return new SettableAnyProperty(_property, _setter, _type,
_keyDeserializer, deser, _valueTypeDeserializer);
}
public void fixAccess(DeserializationConfig config) {
_setter.fixAccess(
config.isEnabled(MapperFeature.OVERRIDE_PUBLIC_ACCESS_MODIFIERS));
}
/*
/**********************************************************
/* JDK serialization handling
/**********************************************************
*/
/**
* Need to define this to verify that we retain actual Method reference
*/
Object readResolve() {
// sanity check...
if (_setter == null || _setter.getAnnotated() == null) {
throw new IllegalArgumentException("Missing method (broken JDK (de)serialization?)");
}
return this;
}
/*
/**********************************************************
/* Public API, accessors
/**********************************************************
*/
public BeanProperty getProperty() { return _property; }
public boolean hasValueDeserializer() { return (_valueDeserializer != null); }
public JavaType getType() { return _type; }
/*
/**********************************************************
/* Public API, deserialization
/**********************************************************
*/
/**
* Method called to deserialize appropriate value, given parser (and
* context), and set it using appropriate method (a setter method).
*/
public final void deserializeAndSet(JsonParser p, DeserializationContext ctxt,
Object instance, String propName)
throws IOException
{
try {
Object key = (_keyDeserializer == null) ? propName
: _keyDeserializer.deserializeKey(propName, ctxt);
set(instance, key, deserialize(p, ctxt));
} catch (UnresolvedForwardReference reference) {
if (!(_valueDeserializer.getObjectIdReader() != null)) {
throw JsonMappingException.from(p, "Unresolved forward reference but no identity info.", reference);
}
AnySetterReferring referring = new AnySetterReferring(this, reference,
_type.getRawClass(), instance, propName);
reference.getRoid().appendReferring(referring);
}
}
public Object deserialize(JsonParser p, DeserializationContext ctxt) throws IOException
{
if (p.hasToken(JsonToken.VALUE_NULL)) {
return _valueDeserializer.getNullValue(ctxt);
}
if (_valueTypeDeserializer != null) {
return _valueDeserializer.deserializeWithType(p, ctxt, _valueTypeDeserializer);
}
return _valueDeserializer.deserialize(p, ctxt);
}
@SuppressWarnings("unchecked")
public void set(Object instance, Object propName, Object value) throws IOException
{
try {
// if annotation in the field (only map is supported now)
if (_setterIsField) {
AnnotatedField field = (AnnotatedField) _setter;
Map val = (Map) field.getValue(instance);
/* 01-Jun-2016, tatu: At this point it is not quite clear what to do if
* field is `null` -- we cannot necessarily count on zero-args
* constructor except for a small set of types, so for now just
* ignore if null. May need to figure out something better in future.
*/
if (val != null) {
// add the property key and value
val.put(propName, value);
}
} else {
// note: cannot use 'setValue()' due to taking 2 args
((AnnotatedMethod) _setter).callOnWith(instance, propName, value);
}
} catch (Exception e) {
_throwAsIOE(e, propName, value);
}
}
/*
/**********************************************************
/* Helper methods
/**********************************************************
*/
/**
* @param e Exception to re-throw or wrap
* @param propName Name of property (from Json input) to set
* @param value Value of the property
*/
protected void _throwAsIOE(Exception e, Object propName, Object value)
throws IOException
{
if (e instanceof IllegalArgumentException) {
String actType = ClassUtil.classNameOf(value);
StringBuilder msg = new StringBuilder("Problem deserializing \"any\" property '").append(propName);
msg.append("' of class "+getClassName()+" (expected type: ").append(_type);
msg.append("; actual type: ").append(actType).append(")");
String origMsg = ClassUtil.exceptionMessage(e);
if (origMsg != null) {
msg.append(", problem: ").append(origMsg);
} else {
msg.append(" (no error message provided)");
}
throw new JsonMappingException(null, msg.toString(), e);
}
ClassUtil.throwIfIOE(e);
ClassUtil.throwIfRTE(e);
// let's wrap the innermost problem
Throwable t = ClassUtil.getRootCause(e);
throw new JsonMappingException(null, ClassUtil.exceptionMessage(t), t);
}
private String getClassName() { return _setter.getDeclaringClass().getName(); }
@Override public String toString() { return "[any property on class "+getClassName()+"]"; }
private static class AnySetterReferring extends Referring {
private final SettableAnyProperty _parent;
private final Object _pojo;
private final String _propName;
public AnySetterReferring(SettableAnyProperty parent,
UnresolvedForwardReference reference, Class type, Object instance, String propName)
{
super(reference, type);
_parent = parent;
_pojo = instance;
_propName = propName;
}
@Override
public void handleResolvedForwardReference(Object id, Object value)
throws IOException
{
if (!hasId(id)) {
throw new IllegalArgumentException("Trying to resolve a forward reference with id [" + id.toString()
+ "] that wasn't previously registered.");
}
_parent.set(_pojo, _propName, value);
}
}
}
