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NullConversionsSkipTest.java
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NullConversionsSkipTest.java
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package com.fasterxml.jackson.databind.deser.filter;
import com.fasterxml.jackson.annotation.JsonSetter;
import com.fasterxml.jackson.annotation.Nulls;
import com.fasterxml.jackson.databind.*;
// for [databind#1402]; configurable null handling, specifically with SKIP
public class NullConversionsSkipTest extends BaseMapTest
{
static class NullSkipField {
public String nullsOk = "a";
@JsonSetter(nulls=Nulls.SKIP)
public String noNulls = "b";
}
static class NullSkipMethod {
String _nullsOk = "a";
String _noNulls = "b";
public void setNullsOk(String v) {
_nullsOk = v;
}
@JsonSetter(nulls=Nulls.SKIP)
public void setNoNulls(String v) {
_noNulls = v;
}
}
static class StringValue {
String value = "default";
public void setValue(String v) {
value = v;
}
}
/*
/**********************************************************
/* Test methods, straight annotation
/**********************************************************
*/
private final ObjectMapper MAPPER = new ObjectMapper();
public void testSkipNullField() throws Exception
{
// first, ok if assigning non-null to not-nullable, null for nullable
NullSkipField result = MAPPER.readValue(aposToQuotes("{'noNulls':'foo', 'nullsOk':null}"),
NullSkipField.class);
assertEquals("foo", result.noNulls);
assertNull(result.nullsOk);
// and then see that nulls are not ok for non-nullable
result = MAPPER.readValue(aposToQuotes("{'noNulls':null}"),
NullSkipField.class);
assertEquals("b", result.noNulls);
assertEquals("a", result.nullsOk);
}
public void testSkipNullMethod() throws Exception
{
NullSkipMethod result = MAPPER.readValue(aposToQuotes("{'noNulls':'foo', 'nullsOk':null}"),
NullSkipMethod.class);
assertEquals("foo", result._noNulls);
assertNull(result._nullsOk);
result = MAPPER.readValue(aposToQuotes("{'noNulls':null}"),
NullSkipMethod.class);
assertEquals("b", result._noNulls);
assertEquals("a", result._nullsOk);
}
/*
/**********************************************************
/* Test methods, defaulting
/**********************************************************
*/
public void testSkipNullWithDefaults() throws Exception
{
String json = aposToQuotes("{'value':null}");
StringValue result = MAPPER.readValue(json, StringValue.class);
assertNull(result.value);
ObjectMapper mapper = new ObjectMapper();
mapper.configOverride(String.class)
.setSetterInfo(JsonSetter.Value.forValueNulls(Nulls.SKIP));
result = mapper.readValue(json, StringValue.class);
assertEquals("default", result.value);
}
}