public boolean handles(NodeTuple tuple) {
if (tuple.getKeyNode() instanceof ScalarNode) {
ScalarNode keyNode = (ScalarNode) tuple.getKeyNode();
return keyNode.getValue().startsWith("/");
} else {
return false;
}
}
private ScalarNode cloneScalarNode(ScalarNode node, Map<String, String> parameters) {
Pattern pattern = Pattern.compile("<<[^>]+>>");
String value = node.getValue();
Matcher matcher = pattern.matcher(value);
StringBuffer sb = new StringBuffer();
while (matcher.find()) {
matcher.appendReplacement(sb, "");
sb.append(resolveParameter(matcher.group(), parameters, node));
}
matcher.appendTail(sb);
return new ScalarNode(
node.getTag(), sb.toString(), node.getStartMark(), node.getEndMark(), node.getStyle());
}
@SuppressWarnings("unchecked")
private Object constructStandardJavaInstance(
@SuppressWarnings("rawtypes") Class type, ScalarNode node) {
Object result;
if (type == String.class) {
Construct stringConstructor = yamlConstructors.get(Tag.STR);
result = stringConstructor.construct(node);
} else if (type == Boolean.class || type == Boolean.TYPE) {
Construct boolConstructor = yamlConstructors.get(Tag.BOOL);
result = boolConstructor.construct(node);
} else if (type == Character.class || type == Character.TYPE) {
Construct charConstructor = yamlConstructors.get(Tag.STR);
String ch = (String) charConstructor.construct(node);
if (ch.length() == 0) {
result = null;
} else if (ch.length() != 1) {
throw new YAMLException("Invalid node Character: '" + ch + "'; length: " + ch.length());
} else {
result = Character.valueOf(ch.charAt(0));
}
} else if (Date.class.isAssignableFrom(type)) {
Construct dateConstructor = yamlConstructors.get(Tag.TIMESTAMP);
Date date = (Date) dateConstructor.construct(node);
if (type == Date.class) {
result = date;
} else {
try {
java.lang.reflect.Constructor<?> constr = type.getConstructor(long.class);
result = constr.newInstance(date.getTime());
} catch (Exception e) {
throw new YAMLException("Cannot construct: '" + type + "'");
}
}
} else if (type == Float.class
|| type == Double.class
|| type == Float.TYPE
|| type == Double.TYPE
|| type == BigDecimal.class) {
if (type == BigDecimal.class) {
result = new BigDecimal(node.getValue());
} else {
Construct doubleConstructor = yamlConstructors.get(Tag.FLOAT);
result = doubleConstructor.construct(node);
if (type == Float.class || type == Float.TYPE) {
result = new Float((Double) result);
}
}
} else if (type == Byte.class
|| type == Short.class
|| type == Integer.class
|| type == Long.class
|| type == BigInteger.class
|| type == Byte.TYPE
|| type == Short.TYPE
|| type == Integer.TYPE
|| type == Long.TYPE) {
Construct intConstructor = yamlConstructors.get(Tag.INT);
result = intConstructor.construct(node);
if (type == Byte.class || type == Byte.TYPE) {
result = new Byte(result.toString());
} else if (type == Short.class || type == Short.TYPE) {
result = new Short(result.toString());
} else if (type == Integer.class || type == Integer.TYPE) {
result = Integer.parseInt(result.toString());
} else if (type == Long.class || type == Long.TYPE) {
result = new Long(result.toString());
} else {
// only BigInteger left
result = new BigInteger(result.toString());
}
} else if (Enum.class.isAssignableFrom(type)) {
String enumValueName = node.getValue();
try {
result = Enum.valueOf(type, enumValueName);
} catch (Exception ex) {
throw new YAMLException(
"Unable to find enum value '"
+ enumValueName
+ "' for enum class: "
+ type.getName());
}
} else if (Calendar.class.isAssignableFrom(type)) {
ConstructYamlTimestamp contr = new ConstructYamlTimestamp();
contr.construct(node);
result = contr.getCalendar();
} else {
throw new YAMLException("Unsupported class: " + type);
}
return result;
}
public Object construct(Node nnode) {
ScalarNode node = (ScalarNode) nnode;
Class<?> type = node.getType();
Object result;
if (type.isPrimitive()
|| type == String.class
|| Number.class.isAssignableFrom(type)
|| type == Boolean.class
|| Date.class.isAssignableFrom(type)
|| type == Character.class
|| type == BigInteger.class
|| type == BigDecimal.class
|| Enum.class.isAssignableFrom(type)
|| Tag.BINARY.equals(node.getTag())
|| Calendar.class.isAssignableFrom(type)) {
// standard classes created directly
result = constructStandardJavaInstance(type, node);
} else {
// there must be only 1 constructor with 1 argument
java.lang.reflect.Constructor<?>[] javaConstructors = type.getConstructors();
int oneArgCount = 0;
java.lang.reflect.Constructor<?> javaConstructor = null;
for (java.lang.reflect.Constructor<?> c : javaConstructors) {
if (c.getParameterTypes().length == 1) {
oneArgCount++;
javaConstructor = c;
}
}
Object argument;
if (javaConstructor == null) {
throw new YAMLException("No single argument constructor found for " + type);
} else if (oneArgCount == 1) {
argument = constructStandardJavaInstance(javaConstructor.getParameterTypes()[0], node);
} else {
// TODO it should be possible to use implicit types instead
// of forcing String. Resolver must be available here to
// obtain the implicit tag. Then we can set the tag and call
// callConstructor(node) to create the argument instance.
// On the other hand it may be safer to require a custom
// constructor to avoid guessing the argument class
argument = constructScalar(node);
try {
javaConstructor = type.getConstructor(String.class);
} catch (Exception e) {
throw new ConstructorException(
null,
null,
"Can't construct a java object for scalar "
+ node.getTag()
+ "; No String constructor found. Exception="
+ e.getMessage(),
node.getStartMark(),
e);
}
}
try {
result = javaConstructor.newInstance(argument);
} catch (Exception e) {
throw new ConstructorException(
null,
null,
"Can't construct a java object for scalar "
+ node.getTag()
+ "; exception="
+ e.getMessage(),
node.getStartMark(),
e);
}
}
return result;
}
protected Object constructJavaBean2ndStep(MappingNode node, Object object) {
flattenMapping(node);
Class<? extends Object> beanType = node.getType();
List<NodeTuple> nodeValue = node.getValue();
for (NodeTuple tuple : nodeValue) {
ScalarNode keyNode;
if (tuple.getKeyNode() instanceof ScalarNode) {
// key must be scalar
keyNode = (ScalarNode) tuple.getKeyNode();
} else {
throw new YAMLException("Keys must be scalars but found: " + tuple.getKeyNode());
}
Node valueNode = tuple.getValueNode();
// keys can only be Strings
keyNode.setType(String.class);
String key = (String) constructObject(keyNode);
try {
Property property = getProperty(beanType, key);
valueNode.setType(property.getType());
TypeDescription memberDescription = typeDefinitions.get(beanType);
boolean typeDetected = false;
if (memberDescription != null) {
switch (valueNode.getNodeId()) {
case sequence:
SequenceNode snode = (SequenceNode) valueNode;
Class<? extends Object> memberType = memberDescription.getListPropertyType(key);
if (memberType != null) {
snode.setListType(memberType);
typeDetected = true;
} else if (property.getType().isArray()) {
snode.setListType(property.getType().getComponentType());
typeDetected = true;
}
break;
case mapping:
MappingNode mnode = (MappingNode) valueNode;
Class<? extends Object> keyType = memberDescription.getMapKeyType(key);
if (keyType != null) {
mnode.setTypes(keyType, memberDescription.getMapValueType(key));
typeDetected = true;
}
break;
default: // scalar
}
}
if (!typeDetected && valueNode.getNodeId() != NodeId.scalar) {
// only if there is no explicit TypeDescription
Class<?>[] arguments = property.getActualTypeArguments();
if (arguments != null) {
// type safe (generic) collection may contain the
// proper class
if (valueNode.getNodeId() == NodeId.sequence) {
Class<?> t = arguments[0];
SequenceNode snode = (SequenceNode) valueNode;
snode.setListType(t);
} else if (valueNode.getTag().equals(Tag.SET)) {
Class<?> t = arguments[0];
MappingNode mnode = (MappingNode) valueNode;
mnode.setOnlyKeyType(t);
mnode.setUseClassConstructor(true);
} else if (property.getType().isAssignableFrom(Map.class)) {
Class<?> ketType = arguments[0];
Class<?> valueType = arguments[1];
MappingNode mnode = (MappingNode) valueNode;
mnode.setTypes(ketType, valueType);
mnode.setUseClassConstructor(true);
} else {
// the type for collection entries cannot be
// detected
}
}
}
Object value = constructObject(valueNode);
property.set(object, value);
} catch (Exception e) {
throw new YAMLException(
"Cannot create property=" + key + " for JavaBean=" + object + "; " + e.getMessage(),
e);
}
}
return object;
}
