Eric Martin
GitHub
commit
f0d27bc7ac
@ -0,0 +1,9 @@
|
||||
package org.baeldung.gson.primitives.models;
|
||||
|
||||
public class BooleanExample {
|
||||
public boolean value;
|
||||
|
||||
public String toString() {
|
||||
return "{boolean: " + value + "}";
|
||||
}
|
||||
}
|
||||
@ -0,0 +1,9 @@
|
||||
package org.baeldung.gson.primitives.models;
|
||||
|
||||
public class ByteExample {
|
||||
public byte value = (byte) 1;
|
||||
|
||||
public String toString() {
|
||||
return "{byte: " + value + "}";
|
||||
}
|
||||
}
|
||||
@ -0,0 +1,9 @@
|
||||
package org.baeldung.gson.primitives.models;
|
||||
|
||||
public class CharExample {
|
||||
public char value;
|
||||
|
||||
public String toString() {
|
||||
return "{char: " + value + "}";
|
||||
}
|
||||
}
|
||||
@ -0,0 +1,9 @@
|
||||
package org.baeldung.gson.primitives.models;
|
||||
|
||||
public class DoubleExample {
|
||||
public double value;
|
||||
|
||||
public String toString() {
|
||||
return "{float: " + value + "}";
|
||||
}
|
||||
}
|
||||
@ -0,0 +1,9 @@
|
||||
package org.baeldung.gson.primitives.models;
|
||||
|
||||
public class FloatExample {
|
||||
public float value;
|
||||
|
||||
public String toString() {
|
||||
return "{float: " + value + "}";
|
||||
}
|
||||
}
|
||||
@ -0,0 +1,6 @@
|
||||
package org.baeldung.gson.primitives.models;
|
||||
|
||||
public class InfinityValuesExample {
|
||||
public float negativeInfinity;
|
||||
public float positiveInfinity;
|
||||
}
|
||||
@ -0,0 +1,9 @@
|
||||
package org.baeldung.gson.primitives.models;
|
||||
|
||||
public class LongExample {
|
||||
public long value = 1;
|
||||
|
||||
public String toString() {
|
||||
return "{byte: " + value + "}";
|
||||
}
|
||||
}
|
||||
@ -0,0 +1,19 @@
|
||||
package org.baeldung.gson.primitives.models;
|
||||
|
||||
public class PrimitiveBundle {
|
||||
public byte byteValue;
|
||||
public short shortValue;
|
||||
public int intValue;
|
||||
public long longValue;
|
||||
public float floatValue;
|
||||
public double doubleValue;
|
||||
public boolean booleanValue;
|
||||
public char charValue;
|
||||
|
||||
public String toString() {
|
||||
return "{" + "byte: " + byteValue + ", " + "short: " + shortValue + ", "
|
||||
+ "int: " + intValue + ", " + "long: " + longValue + ", "
|
||||
+ "float: " + floatValue + ", " + "double: " + doubleValue + ", "
|
||||
+ "boolean: " + booleanValue + ", " + "char: " + charValue + "}";
|
||||
}
|
||||
}
|
||||
@ -0,0 +1,18 @@
|
||||
package org.baeldung.gson.primitives.models;
|
||||
|
||||
public class PrimitiveBundleInitialized {
|
||||
// @formatter:off
|
||||
public byte byteValue = (byte) 1;
|
||||
public short shortValue = (short) 1;
|
||||
public int intValue = 1;
|
||||
public long longValue = 1L;
|
||||
public float floatValue = 1.0f;
|
||||
public double doubleValue = 1;
|
||||
// @formatter:on
|
||||
|
||||
public String toString() {
|
||||
return "{" + "byte: " + byteValue + ", " + "short: " + shortValue + ", "
|
||||
+ "int: " + intValue + ", " + "long: " + longValue + ", "
|
||||
+ "float: " + floatValue + ", " + "double: " + doubleValue + "}";
|
||||
}
|
||||
}
|
||||
@ -0,0 +1,248 @@
|
||||
package org.baeldung.gson.primitives;
|
||||
|
||||
import com.google.gson.*;
|
||||
import org.baeldung.gson.primitives.models.*;
|
||||
import org.junit.Test;
|
||||
|
||||
import java.lang.reflect.Type;
|
||||
|
||||
import static junit.framework.TestCase.*;
|
||||
|
||||
public class PrimitiveValuesUnitTest {
|
||||
@Test public void whenSerializingToJSON_thenShouldCreateJSON() {
|
||||
PrimitiveBundle primitiveBundle = new PrimitiveBundle();
|
||||
|
||||
// @formatter:off
|
||||
primitiveBundle.byteValue = (byte) 0x00001111;
|
||||
primitiveBundle.shortValue = (short) 3;
|
||||
primitiveBundle.intValue = 3;
|
||||
primitiveBundle.longValue = 3;
|
||||
primitiveBundle.floatValue = 3.5f;
|
||||
primitiveBundle.doubleValue = 3.5;
|
||||
primitiveBundle.booleanValue = true;
|
||||
primitiveBundle.charValue = 'a';
|
||||
// @formatter:on
|
||||
|
||||
Gson gson = new Gson();
|
||||
|
||||
String expected = "{\"byteValue\":17,\"shortValue\":3,\"intValue\":3,"
|
||||
+ "\"longValue\":3,\"floatValue\":3.5" + ",\"doubleValue\":3.5"
|
||||
+ ",\"booleanValue\":true,\"charValue\":\"a\"}";
|
||||
|
||||
assertEquals(expected, gson.toJson(primitiveBundle));
|
||||
}
|
||||
|
||||
@Test(expected = IllegalArgumentException.class) public void
|
||||
whenSerializingInfinity_thenShouldRaiseAnException() {
|
||||
InfinityValuesExample model = new InfinityValuesExample();
|
||||
model.negativeInfinity = Float.NEGATIVE_INFINITY;
|
||||
model.positiveInfinity = Float.POSITIVE_INFINITY;
|
||||
|
||||
Gson gson = new Gson();
|
||||
|
||||
gson.toJson(model);
|
||||
}
|
||||
|
||||
@Test(expected = IllegalArgumentException.class) public void
|
||||
whenSerializingNaN_thenShouldRaiseAnException() {
|
||||
FloatExample model = new FloatExample();
|
||||
model.value = Float.NaN;
|
||||
|
||||
Gson gson = new Gson();
|
||||
gson.toJson(model);
|
||||
}
|
||||
|
||||
@Test public void whenDeserializingFromJSON_thenShouldParseTheValueInTheString() {
|
||||
String json = "{\"byteValue\": 17, \"shortValue\": 3, \"intValue\": 3, "
|
||||
+ "\"longValue\": 3, \"floatValue\": 3.5" + ", \"doubleValue\": 3.5"
|
||||
+ ", \"booleanValue\": true, \"charValue\": \"a\"}";
|
||||
|
||||
Gson gson = new Gson();
|
||||
PrimitiveBundle model = gson.fromJson(json, PrimitiveBundle.class);
|
||||
|
||||
// @formatter:off
|
||||
assertEquals(17, model.byteValue);
|
||||
assertEquals(3, model.shortValue);
|
||||
assertEquals(3, model.intValue);
|
||||
assertEquals(3, model.longValue);
|
||||
assertEquals(3.5, model.floatValue, 0.0001);
|
||||
assertEquals(3.5, model.doubleValue, 0.0001);
|
||||
assertTrue( model.booleanValue);
|
||||
assertEquals('a', model.charValue);
|
||||
// @formatter:on
|
||||
}
|
||||
|
||||
@Test public void whenDeserializingHighPrecissionNumberIntoFloat_thenShouldPerformRounding() {
|
||||
String json = "{\"value\": 12.123425589123456}";
|
||||
Gson gson = new Gson();
|
||||
FloatExample model = gson.fromJson(json, FloatExample.class);
|
||||
assertEquals(12.123426f, model.value, 0.000001);
|
||||
}
|
||||
|
||||
@Test public void whenDeserializingHighPrecissiongNumberIntoDouble_thenShouldPerformRounding() {
|
||||
String json = "{\"value\": 12.123425589123556}";
|
||||
Gson gson = new Gson();
|
||||
DoubleExample model = gson.fromJson(json, DoubleExample.class);
|
||||
assertEquals(12.123425589124f, model.value, 0.000001);
|
||||
}
|
||||
|
||||
|
||||
@Test public void whenDeserializingValueThatOverflows_thenShouldOverflowSilently() {
|
||||
Gson gson = new Gson();
|
||||
String json = "{\"value\": \"300\"}";
|
||||
ByteExample model = gson.fromJson(json, ByteExample.class);
|
||||
|
||||
assertEquals(44, model.value);
|
||||
}
|
||||
|
||||
@Test public void whenDeserializingRealIntoByte_thenShouldRaiseAnException() {
|
||||
Gson gson = new Gson();
|
||||
String json = "{\"value\": 2.3}";
|
||||
try {
|
||||
gson.fromJson(json, ByteExample.class);
|
||||
} catch (Exception ex) {
|
||||
assertTrue(ex instanceof JsonSyntaxException);
|
||||
assertTrue(ex.getCause() instanceof NumberFormatException);
|
||||
return;
|
||||
}
|
||||
|
||||
fail();
|
||||
}
|
||||
|
||||
@Test public void whenDeserializingRealIntoLong_thenShouldRaiseAnException() {
|
||||
Gson gson = new Gson();
|
||||
String json = "{\"value\": 2.3}";
|
||||
try {
|
||||
gson.fromJson(json, LongExample.class);
|
||||
} catch (Exception ex) {
|
||||
assertTrue(ex instanceof JsonSyntaxException);
|
||||
assertTrue(ex.getCause() instanceof NumberFormatException);
|
||||
return;
|
||||
}
|
||||
|
||||
fail();
|
||||
}
|
||||
|
||||
@Test public void whenDeserializingRealWhoseDecimalPartIs0_thenShouldParseItCorrectly() {
|
||||
Gson gson = new Gson();
|
||||
String json = "{\"value\": 2.0}";
|
||||
LongExample model = gson.fromJson(json, LongExample.class);
|
||||
assertEquals(2, model.value);
|
||||
}
|
||||
|
||||
@Test public void whenDeserializingUnicodeChar_thenShouldParseItCorrectly() {
|
||||
Gson gson = new Gson();
|
||||
String json = "{\"value\": \"\\u00AE\"}";
|
||||
CharExample model = gson.fromJson(json, CharExample.class);
|
||||
|
||||
assertEquals('\u00AE', model.value);
|
||||
}
|
||||
|
||||
@Test public void whenDeserializingNullValues_thenShouldIgnoreThoseFields() {
|
||||
Gson gson = new Gson();
|
||||
// @formatter:off
|
||||
String json = "{\"byteValue\": null, \"shortValue\": null, "
|
||||
+ "\"intValue\": null, " + "\"longValue\": null, \"floatValue\": null"
|
||||
+ ", \"doubleValue\": null}";
|
||||
// @formatter:on
|
||||
PrimitiveBundleInitialized model = gson.fromJson(json,
|
||||
PrimitiveBundleInitialized.class);
|
||||
|
||||
assertEquals(1, model.byteValue);
|
||||
assertEquals(1, model.shortValue);
|
||||
assertEquals(1, model.intValue);
|
||||
assertEquals(1, model.longValue);
|
||||
assertEquals(1, model.floatValue, 0.0001);
|
||||
assertEquals(1, model.doubleValue, 0.0001);
|
||||
}
|
||||
|
||||
@Test(expected = JsonSyntaxException.class) public void
|
||||
whenDeserializingTheEmptyString_thenShouldRaiseAnException() {
|
||||
Gson gson = new Gson();
|
||||
// @formatter:off
|
||||
String json = "{\"byteValue\": \"\", \"shortValue\": \"\", "
|
||||
+ "\"intValue\": \"\", " + "\"longValue\": \"\", \"floatValue\": \"\""
|
||||
+ ", \"doubleValue\": \"\"" + ", \"booleanValue\": \"\"}";
|
||||
// @formatter:on
|
||||
gson.fromJson(json, PrimitiveBundleInitialized.class);
|
||||
}
|
||||
|
||||
@Test public void whenDeserializingTheEmptyStringIntoChar_thenShouldHaveTheEmtpyChar() {
|
||||
Gson gson = new Gson();
|
||||
// @formatter:off
|
||||
String json = "{\"charValue\": \"\"}";
|
||||
// @formatter:on
|
||||
CharExample model = gson.fromJson(json, CharExample.class);
|
||||
|
||||
assertEquals(Character.MIN_VALUE, model.value);
|
||||
}
|
||||
|
||||
@Test public void whenDeserializingValidValueAppearingInAString_thenShouldParseTheValue() {
|
||||
Gson gson = new Gson();
|
||||
// @formatter:off
|
||||
String json = "{\"byteValue\": \"15\", \"shortValue\": \"15\", "
|
||||
+ "\"intValue\": \"15\", " + "\"longValue\": \"15\", \"floatValue\": \"15.0\""
|
||||
+ ", \"doubleValue\": \"15.0\"}";
|
||||
// @formatter:on
|
||||
PrimitiveBundleInitialized model = gson.fromJson(json,
|
||||
PrimitiveBundleInitialized.class);
|
||||
|
||||
assertEquals(15, model.byteValue);
|
||||
assertEquals(15, model.shortValue);
|
||||
assertEquals(15, model.intValue);
|
||||
assertEquals(15, model.longValue);
|
||||
assertEquals(15, model.floatValue, 0.0001);
|
||||
assertEquals(15, model.doubleValue, 0.0001);
|
||||
}
|
||||
|
||||
@Test public void whenDeserializingABooleanFrom0Or1Integer_thenShouldRaiseAnException() {
|
||||
String json = "{\"value\": 1}";
|
||||
Gson gson = new Gson();
|
||||
|
||||
try {
|
||||
gson.fromJson(json, BooleanExample.class);
|
||||
} catch (Exception ex) {
|
||||
assertTrue(ex instanceof JsonSyntaxException);
|
||||
assertTrue(ex.getCause() instanceof IllegalStateException);
|
||||
return;
|
||||
}
|
||||
|
||||
fail();
|
||||
}
|
||||
|
||||
@Test public void whenDeserializingWithCustomDeserializerABooleanFrom0Or1Integer_thenShouldWork() {
|
||||
String json = "{\"value\": 1}";
|
||||
GsonBuilder builder = new GsonBuilder();
|
||||
builder.registerTypeAdapter(BooleanExample.class,
|
||||
new BooleanAs2ValueIntegerDeserializer());
|
||||
|
||||
Gson gson = builder.create();
|
||||
|
||||
BooleanExample model = gson.fromJson(json, BooleanExample.class);
|
||||
|
||||
assertTrue(model.value);
|
||||
}
|
||||
|
||||
// @formatter:off
|
||||
static class BooleanAs2ValueIntegerDeserializer implements JsonDeserializer<BooleanExample> {
|
||||
@Override public BooleanExample deserialize(
|
||||
JsonElement jsonElement,
|
||||
Type type,
|
||||
JsonDeserializationContext jsonDeserializationContext) throws JsonParseException {
|
||||
|
||||
BooleanExample model = new BooleanExample();
|
||||
int value = jsonElement.getAsJsonObject().getAsJsonPrimitive("value").getAsInt();
|
||||
if (value == 0) {
|
||||
model.value = false;
|
||||
} else if (value == 1) {
|
||||
model.value = true;
|
||||
} else {
|
||||
throw new JsonParseException("Unexpected value. Trying to deserialize "
|
||||
+ "a boolean from an integer different than 0 and 1.");
|
||||
}
|
||||
|
||||
return model;
|
||||
}
|
||||
}
|
||||
// @formatter:on
|
||||
}
|
||||
Loading…
x
Reference in New Issue
Block a user