com.groupbyinc.common.jackson.databind.InjectableValues Maven / Gradle / Ivy
package com.fasterxml.jackson.databind;
import java.util.*;
import com.fasterxml.jackson.databind.util.ClassUtil;
/**
* Abstract class that defines API for objects that provide value to
* "inject" during deserialization. An instance of this object
*/
public abstract class InjectableValues
{
/**
* Method called to find value identified by id valueId to
* inject as value of specified property during deserialization, passing
* POJO instance in which value will be injected if it is available
* (will be available when injected via field or setter; not available
* when injected via constructor or factory method argument).
*
* @param valueId Object that identifies value to inject; may be a simple
* name or more complex identifier object, whatever provider needs
* @param ctxt Deserialization context
* @param forProperty Bean property in which value is to be injected
* @param beanInstance Bean instance that contains property to inject,
* if available; null if bean has not yet been constructed.
*/
public abstract Object findInjectableValue(Object valueId, DeserializationContext ctxt,
BeanProperty forProperty, Object beanInstance) throws JsonMappingException;
/*
/**********************************************************
/* Standard implementation
/**********************************************************
*/
/**
* Simple standard implementation which uses a simple Map to
* store values to inject, identified by simple String keys.
*/
public static class Std
extends InjectableValues
implements java.io.Serializable
{
private static final long serialVersionUID = 1L;
protected final Map _values;
public Std() {
this(new HashMap());
}
public Std(Map values) {
_values = values;
}
public Std addValue(String key, Object value) {
_values.put(key, value);
return this;
}
public Std addValue(Class classKey, Object value) {
_values.put(classKey.getName(), value);
return this;
}
@Override
public Object findInjectableValue(Object valueId, DeserializationContext ctxt,
BeanProperty forProperty, Object beanInstance) throws JsonMappingException
{
if (!(valueId instanceof String)) {
ctxt.reportBadDefinition(ClassUtil.classOf(valueId),
String.format(
"Unrecognized inject value id type (%s), expecting String",
ClassUtil.classNameOf(valueId)));
}
String key = (String) valueId;
Object ob = _values.get(key);
if (ob == null && !_values.containsKey(key)) {
throw new IllegalArgumentException("No injectable id with value '"+key+"' found (for property '"+forProperty.getName()+"')");
}
return ob;
}
}
}