/** Unit test to check for regression of [JACKSON-18]. */
public void testSmallNumbers() throws Exception {
ObjectMapper mapper = new ObjectMapper();
ArrayNode root = mapper.createArrayNode();
for (int i = -20; i <= 20; ++i) {
JsonNode n = root.numberNode(i);
root.add(n);
// Hmmh. Not sure why toString() won't be triggered otherwise...
assertEquals(String.valueOf(i), n.toString());
}
// Loop over 2 different serialization methods
for (int type = 0; type < 2; ++type) {
StringWriter sw = new StringWriter();
if (type == 0) {
JsonGenerator gen = new JsonFactory().createGenerator(sw);
root.serialize(gen, null);
gen.close();
} else {
mapper.writeValue(sw, root);
}
String doc = sw.toString();
JsonParser p = new JsonFactory().createParser(new StringReader(doc));
assertEquals(JsonToken.START_ARRAY, p.nextToken());
for (int i = -20; i <= 20; ++i) {
assertEquals(JsonToken.VALUE_NUMBER_INT, p.nextToken());
assertEquals(i, p.getIntValue());
assertEquals("" + i, p.getText());
}
assertEquals(JsonToken.END_ARRAY, p.nextToken());
p.close();
}
}
@Override
public Leaf deserialize(JsonParser jp, DeserializationContext ctxt)
throws IOException, JsonProcessingException {
JsonNode tree = (JsonNode) jp.readValueAsTree();
Leaf leaf = new Leaf();
leaf.value = tree.get("value").intValue();
return leaf;
}
public void testEmbeddedObject() throws Exception {
TokenBuffer buf = new TokenBuffer(MAPPER);
buf.writeObject(new byte[3]);
JsonNode node = MAPPER.readTree(buf.asParser());
buf.close();
assertTrue(node.isBinary());
byte[] data = node.binaryValue();
assertNotNull(data);
assertEquals(3, data.length);
}
// [Issue#232]
public void testBigDecimalAsPlainStringTreeConversion() throws Exception {
ObjectMapper mapper = new ObjectMapper();
mapper.enable(SerializationFeature.WRITE_BIGDECIMAL_AS_PLAIN);
Map<String, Object> map = new HashMap<String, Object>();
String PI_STR = "3.00000000";
map.put("pi", new BigDecimal(PI_STR));
JsonNode tree = mapper.valueToTree(map);
assertNotNull(tree);
assertEquals(1, tree.size());
assertTrue(tree.has("pi"));
}
/**
* Method for locating node specified by given JSON pointer instances. Method will never return
* null; if no matching node exists, will return a node for which {@link #isMissingNode()} returns
* true.
*
* @return Node that matches given JSON Pointer: if no match exists, will return a node for which
* {@link #isMissingNode()} returns true.
* @since 2.3
*/
@Override
public final JsonNode at(JsonPointer ptr) {
// Basically: value nodes only match if we have "empty" path left
if (ptr.matches()) {
return this;
}
JsonNode n = _at(ptr);
if (n == null) {
return MissingNode.getInstance();
}
return n.at(ptr.tail());
}
public void testEmbeddedObjectInArray() throws Exception {
TokenBuffer buf = new TokenBuffer(MAPPER);
buf.writeStartArray();
buf.writeObject(MARKER);
buf.writeEndArray();
JsonNode node = MAPPER.readTree(buf.asParser());
buf.close();
assertTrue(node.isArray());
assertEquals(1, node.size());
JsonNode n = node.get(0);
assertTrue(n.isPojo());
assertSame(MARKER, ((POJONode) n).getPojo());
}
/**
* Method that is similar to {@link #has(int)}, but that will return <code>false</code> for
* explicitly added nulls.
*
* <p>This method is equivalent to:
*
* <pre>
* node.get(index) != null << !node.get(index).isNull()
* </pre>
*
* @since 2.1
*/
public boolean hasNonNull(int index) {
JsonNode n = get(index);
return (n != null) && !n.isNull();
}
/**
* Method that is similar to {@link #has(String)}, but that will return <code>false</code> for
* explicitly added nulls.
*
* <p>This method is functionally equivalent to:
*
* <pre>
* node.get(fieldName) != null << !node.get(fieldName).isNull()
* </pre>
*
* @since 2.1
*/
public boolean hasNonNull(String fieldName) {
JsonNode n = get(fieldName);
return (n != null) && !n.isNull();
}