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java.lang.NumberFormatException

See original GitHub issue

when update the version to 2.9 ,I got an exception.The detail is as follow:

java.lang.NumberFormatException: For input string: ""
	at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
	at java.lang.Long.parseLong(Long.java:601)
	at java.lang.Long.valueOf(Long.java:803)
	at io.swagger.models.parameters.AbstractSerializableParameter.getExample(AbstractSerializableParameter.java:395)
	at sun.reflect.GeneratedMethodAccessor208.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:664)
	at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:689)
	at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:155)
	at com.fasterxml.jackson.databind.ser.impl.IndexedListSerializer.serializeContents(IndexedListSerializer.java:119)
	at com.fasterxml.jackson.databind.ser.impl.IndexedListSerializer.serialize(IndexedListSerializer.java:79)
	at com.fasterxml.jackson.databind.ser.impl.IndexedListSerializer.serialize(IndexedListSerializer.java:18)
	at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:704)
	at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:689)
	at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:155)
	at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:704)
	at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:689)
	at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:155)
	at com.fasterxml.jackson.databind.ser.std.MapSerializer.serializeFields(MapSerializer.java:633)
	at com.fasterxml.jackson.databind.ser.std.MapSerializer.serialize(MapSerializer.java:536)
	at com.fasterxml.jackson.databind.ser.std.MapSerializer.serialize(MapSerializer.java:30)
	at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:704)
	at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:689)
	at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:155)
	at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:292)
	at com.fasterxml.jackson.databind.ObjectMapper._configAndWriteValue(ObjectMapper.java:3697)
	at com.fasterxml.jackson.databind.ObjectMapper.writeValueAsString(ObjectMapper.java:3073)
	at springfox.documentation.spring.web.json.JsonSerializer.toJson(JsonSerializer.java:38)
	at springfox.documentation.swagger2.web.Swagger2Controller.getDocumentation(Swagger2Controller.java:105)

In the class of “AbstractSerializableParameter”:

@JsonProperty("x-example")
    public Object getExample() {
        if (example == null) {
            return null;
        }
        try {
            if (BaseIntegerProperty.TYPE.equals(type)) {
                return Long.valueOf(example);
            } else if (DecimalProperty.TYPE.equals(type)) {
                return Double.valueOf(example);
            } else if (BooleanProperty.TYPE.equals(type)) {
                if ("true".equalsIgnoreCase(example) || "false".equalsIgnoreCase(defaultValue)) {
                    return Boolean.valueOf(example);
                }
            }
        } catch (NumberFormatException e) {
            LOGGER.warn(String.format("Illegal DefaultValue %s for parameter type %s", defaultValue, type), e);
        }
        return example;
    }

The value of “example” is “”,while in the version of 2.8 the the value of “example” is null.That is the reason of this exception.

Issue Analytics

State:
Created 5 years ago
Comments:9 (3 by maintainers)

Top GitHub Comments

1reaction

gardengeek99commented, Sep 19, 2018

Yeah, this is annoying me as well. My work-around was to just always set an example for @ApiParam used for parameters of type long (or any other non string basic type).

0reactions

stale[bot]commented, Jul 8, 2020

This issue has been automatically closed because it has not had recent activity. Please re-open a new issue if this is still an issue.