com.fasterxml.jackson.databind.node.POJONode Maven / Gradle / Ivy
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This artifact provides a single jar that contains all classes required to use remote Jakarta Enterprise Beans and Jakarta Messaging, including
all dependencies. It is intended for use by those not using maven, maven users should just import the Jakarta Enterprise Beans and
Jakarta Messaging BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
package com.fasterxml.jackson.databind.node;
import java.io.IOException;
import com.fasterxml.jackson.core.*;
import com.fasterxml.jackson.databind.JsonSerializable;
import com.fasterxml.jackson.databind.SerializerProvider;
/**
* Value node that contains a wrapped POJO, to be serialized as
* a JSON constructed through data mapping (usually done by
* calling {@link com.fasterxml.jackson.databind.ObjectMapper}).
*/
public class POJONode
extends ValueNode
{
private static final long serialVersionUID = 2L;
protected final Object _value;
public POJONode(Object v) { _value = v; }
/*
/**********************************************************
/* Base class overrides
/**********************************************************
*/
@Override
public JsonNodeType getNodeType() {
return JsonNodeType.POJO;
}
@Override public JsonToken asToken() { return JsonToken.VALUE_EMBEDDED_OBJECT; }
/**
* As it is possible that some implementations embed byte[] as POJONode
* (despite optimal being {@link BinaryNode}), let's add support for exposing
* binary data here too.
*/
@Override
public byte[] binaryValue() throws IOException
{
if (_value instanceof byte[]) {
return (byte[]) _value;
}
return super.binaryValue();
}
/*
/**********************************************************
/* General type coercions
/**********************************************************
*/
@Override
public String asText() { return (_value == null) ? "null" : _value.toString(); }
@Override public String asText(String defaultValue) {
return (_value == null) ? defaultValue : _value.toString();
}
@Override
public boolean asBoolean(boolean defaultValue)
{
if (_value != null && _value instanceof Boolean) {
return ((Boolean) _value).booleanValue();
}
return defaultValue;
}
@Override
public int asInt(int defaultValue)
{
if (_value instanceof Number) {
return ((Number) _value).intValue();
}
return defaultValue;
}
@Override
public long asLong(long defaultValue)
{
if (_value instanceof Number) {
return ((Number) _value).longValue();
}
return defaultValue;
}
@Override
public double asDouble(double defaultValue)
{
if (_value instanceof Number) {
return ((Number) _value).doubleValue();
}
return defaultValue;
}
/*
/**********************************************************
/* Public API, serialization
/**********************************************************
*/
@Override
public final void serialize(JsonGenerator gen, SerializerProvider ctxt) throws IOException
{
if (_value == null) {
ctxt.defaultSerializeNull(gen);
} else if (_value instanceof JsonSerializable) {
((JsonSerializable) _value).serialize(gen, ctxt);
} else {
// 25-May-2018, tatu: [databind#1991] do not call via generator but through context;
// this to preserve contextual information
ctxt.defaultSerializeValue(_value, gen);
}
}
/*
/**********************************************************
/* Extended API
/**********************************************************
*/
/**
* Method that can be used to access the POJO this node wraps.
*/
public Object getPojo() { return _value; }
/*
/**********************************************************
/* Overridden standard methods
/**********************************************************
*/
@Override
public boolean equals(Object o)
{
if (o == this) return true;
if (o == null) return false;
if (o instanceof POJONode) {
return _pojoEquals((POJONode) o);
}
return false;
}
/**
* @since 2.3
*/
protected boolean _pojoEquals(POJONode other)
{
if (_value == null) {
return other._value == null;
}
return _value.equals(other._value);
}
@Override
public int hashCode() { return _value.hashCode(); }
}
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