io.honeybadger.com.fasterxml.jackson.databind.deser.std.StringDeserializer Maven / Gradle / Ivy
package com.fasterxml.jackson.databind.deser.std;
import java.io.IOException;
import com.fasterxml.jackson.core.*;
import com.fasterxml.jackson.databind.*;
import com.fasterxml.jackson.databind.annotation.JacksonStdImpl;
import com.fasterxml.jackson.databind.jsontype.TypeDeserializer;
@JacksonStdImpl
public class StringDeserializer extends StdScalarDeserializer // non-final since 2.9
{
private static final long serialVersionUID = 1L;
/**
* @since 2.2
*/
public final static StringDeserializer instance = new StringDeserializer();
public StringDeserializer() { super(String.class); }
// since 2.6, slightly faster lookups for this very common type
@Override
public boolean isCachable() { return true; }
@Override // since 2.9
public Object getEmptyValue(DeserializationContext ctxt) throws JsonMappingException {
return "";
}
@Override
public String deserialize(JsonParser p, DeserializationContext ctxt) throws IOException
{
if (p.hasToken(JsonToken.VALUE_STRING)) {
return p.getText();
}
JsonToken t = p.getCurrentToken();
// [databind#381]
if (t == JsonToken.START_ARRAY) {
return _deserializeFromArray(p, ctxt);
}
// need to gracefully handle byte[] data, as base64
if (t == JsonToken.VALUE_EMBEDDED_OBJECT) {
Object ob = p.getEmbeddedObject();
if (ob == null) {
return null;
}
if (ob instanceof byte[]) {
return ctxt.getBase64Variant().encode((byte[]) ob, false);
}
// otherwise, try conversion using toString()...
return ob.toString();
}
// allow coercions for other scalar types
// 17-Jan-2018, tatu: Related to [databind#1853] avoid FIELD_NAME by ensuring it's
// "real" scalar
if (t.isScalarValue()) {
String text = p.getValueAsString();
if (text != null) {
return text;
}
}
return (String) ctxt.handleUnexpectedToken(_valueClass, p);
}
// Since we can never have type info ("natural type"; String, Boolean, Integer, Double):
// (is it an error to even call this version?)
@Override
public String deserializeWithType(JsonParser p, DeserializationContext ctxt,
TypeDeserializer typeDeserializer) throws IOException {
return deserialize(p, ctxt);
}
}