public static <T> Prop<T> cannonicalize(Prop<T> p) {
Prop<T> prop = cannon.computeIfAbsent(p.name, x -> p);
if (p.isCannon() && !prop.isCannon()) {
cannon.put(p.name, p);
prop = p;
} else if (p.isCannon() && prop.isCannon() && p != prop) {
// should be an Error?
System.err.println(" WARNING: two competing canonical definitions of a Prop <" + p + ">");
if (p.typeInformation != null && prop.typeInformation == null) {
cannon.put(p.name, p);
prop = p;
} else if (p.typeInformation == null && prop.typeInformation != null) {
} else if (p.typeInformation != null && prop.typeInformation != null) {
if (!Conversions.typeInformationEquals(p.typeInformation, prop.typeInformation)) {
System.err.println(
" ERROR: the two competing canonical definitions of "
+ p
+ " have different type information");
throw new IllegalArgumentException(
p.typeInformation + " " + prop.typeInformation + " " + p + " " + prop);
}
}
}
prop.setCannon();
return prop;
}
public static boolean toBooleanOrDie(Object obj) {
if (obj == null) {
die("Can't convert boolean from a null");
}
if (obj instanceof Boolean) {
return ((Boolean) obj).booleanValue();
} else if (obj instanceof String || obj instanceof CharSequence) {
String str = Conversions.toString(obj);
if (str.length() == 0) {
return false;
}
if (str.equals("false")) {
return false;
} else if (str.equals("true")) {
return true;
}
die("Can't convert string", obj, "to boolean ");
return false;
} else {
die("Can't convert", obj, "to boolean ");
return false;
}
}
/**
* Converts the value to boolean, and if it is null, it uses the default value passed.
*
* @param obj value to convert to boolean
* @param defaultValue default value
* @return obj converted to boolean
*/
public static boolean toBoolean(Object obj, boolean defaultValue) {
if (obj == null) {
return defaultValue;
}
if (obj instanceof Boolean) {
return ((Boolean) obj).booleanValue();
} else if (obj instanceof Number || obj.getClass().isPrimitive()) {
int value = toInt(obj);
return value != 0 ? true : false;
} else if (obj instanceof String || obj instanceof CharSequence) {
String str = Conversions.toString(obj);
if (str.length() == 0) {
return false;
}
if (str.equals("false")) {
return false;
} else {
return true;
}
} else if (Boon.isArray(obj)) {
return Boon.len(obj) > 0;
} else if (obj instanceof Collection) {
if (len(obj) > 0) {
List list = Lists.list((Collection) obj);
while (list.remove(null)) {}
return Lists.len(list) > 0;
} else {
return false;
}
} else {
return toBoolean(Conversions.toString(obj));
}
}
public static <T> T[] toArray(Class<T> componentType, Collection<T> collection) {
T[] array = (T[]) Array.newInstance(componentType, collection.size());
if (componentType.isAssignableFrom(getComponentType(collection))) {
return collection.toArray(array);
} else {
int index = 0;
for (Object o : collection) {
array[index] = Conversions.coerce(componentType, o);
index++;
}
return array;
}
}
@CallerSensitive
public <T> Prop<T> type() {
Prop on = this;
if (!isCannon()) {
Prop<T> already = (Prop<T>) findCannon();
if (already == null) {
toCannon();
on.setCannon();
} else {
on = already;
}
}
Class c = sun.reflect.Reflection.getCallerClass(2);
on.definedInClass = c;
Field f = null;
try {
f = c.getField(name);
} catch (NoSuchFieldException e) {
try {
f = c.getField("_" + name);
} catch (NoSuchFieldException e3) {
if (name.startsWith("_"))
try {
f = c.getField(name.substring(1));
} catch (NoSuchFieldException e1) {
if (name.startsWith("__"))
try {
f = c.getField(name.substring(1));
} catch (NoSuchFieldException e2) {
}
}
}
}
if (f == null)
throw new IllegalStateException(
" cannot type a Dict.Prop<T> that we can't find. Name is :" + name + " class is :" + c);
on.typeInformation = Conversions.linearize(f.getGenericType());
on.typeInformation.remove(0);
return (Prop<T>) on;
}
/**
* Builder for {@link PatternMatchingConversion} used to configure it.
*
* @param <Source> type to be converted
* @param <Result> type of the conversion result
*/
public static class Builder<Source, Result> {
private final List<Map.Entry<Predicate<Source>, Conversion<Source, Result>>> cases =
new ArrayList<>();
private Conversion<Source, Result> defaultConversion =
Conversions.throwing("Can't find conversion for the given source");
/**
* Specify specification on the conversion source and corresponding object for such case.
*
* @param condition predicate on conversion source returning true if the given conversion should
* be applied.
* @param conversion conversion to be applied on sources satisfying the given predicate
* @return this instance
*/
public Builder<Source, Result> inCaseOf(
Predicate<Source> condition, Conversion<Source, Result> conversion) {
cases.add(new AbstractMap.SimpleEntry<>(condition, conversion));
return this;
}
/**
* Specify default conversion which will be called when there is no match for the given source.
*
* @param defaultConversion default conversion
* @return this instance
*/
public Builder<Source, Result> otherwise(Conversion<Source, Result> defaultConversion) {
this.defaultConversion = defaultConversion;
return this;
}
/**
* Build a {@link PatternMatchingConversion} based on the given configuration.
*
* @return initialized pattern matching conversion
*/
public Conversion<Source, Result> build() {
return new PatternMatchingConversion<>(cases, defaultConversion);
}
}
public static <V> V[] array(Class<V> type, final Collection<V> array) {
return Conversions.toArray(type, array);
}