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ObjectFetcher.java
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ObjectFetcher.java
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package com.denizenscript.denizencore.objects;
import com.denizenscript.denizencore.objects.core.*;
import com.denizenscript.denizencore.tags.ObjectTagProcessor;
import com.denizenscript.denizencore.utilities.CoreUtilities;
import com.denizenscript.denizencore.utilities.debugging.Debug;
import com.denizenscript.denizencore.DenizenCore;
import com.denizenscript.denizencore.tags.TagContext;
import java.lang.invoke.CallSite;
import java.lang.invoke.LambdaMetafactory;
import java.lang.invoke.MethodHandles;
import java.lang.invoke.MethodType;
import java.lang.reflect.Method;
import java.util.*;
public class ObjectFetcher {
@FunctionalInterface
public interface MatchesInterface {
boolean matches(String str);
}
public interface ValueOfInterface<T extends ObjectTag> {
T valueOf(String str, TagContext context);
}
public static class ObjectType<T extends ObjectTag> {
public Class<T> clazz;
public MatchesInterface matches;
public ValueOfInterface<T> valueOf;
public ObjectTagProcessor<T> tagProcessor;
public String prefix;
public boolean isAdjustable;
}
public static Map<String, ObjectType<? extends ObjectTag>> objectsByPrefix = new HashMap<>();
public static Map<Class<? extends ObjectTag>, ObjectType<? extends ObjectTag>> objectsByClass = new HashMap<>();
public static void registerCoreObjects() {
// Initialize the ObjectFetcher
registerWithObjectFetcher(CustomObjectTag.class, CustomObjectTag.tagProcessor); // custom@
registerWithObjectFetcher(DurationTag.class, DurationTag.tagProcessor); // d@
registerWithObjectFetcher(ElementTag.class, ElementTag.tagProcessor); // el@
registerWithObjectFetcher(ListTag.class, ListTag.tagProcessor); // li@
registerWithObjectFetcher(MapTag.class, MapTag.tagProcessor); // map@
registerWithObjectFetcher(QueueTag.class, QueueTag.tagProcessor); // q@
registerWithObjectFetcher(ScriptTag.class, ScriptTag.tagProcessor); // s@
}
public static MatchesInterface getMatchesFor(Class clazz) {
try {
final MethodHandles.Lookup lookup = MethodHandles.lookup();
CallSite site = LambdaMetafactory.metafactory(lookup, "matches", // MatchesInterface#matches
MethodType.methodType(MatchesInterface.class), // Signature of invoke method
MethodType.methodType(Boolean.class, String.class).unwrap(), // signature of MatchesInterface#matches
lookup.findStatic(clazz, "matches", MethodType.methodType(Boolean.class, String.class).unwrap()), // signature of original matches method
MethodType.methodType(Boolean.class, String.class).unwrap()); // Signature of original matches again
return (MatchesInterface) site.getTarget().invoke();
}
catch (Throwable ex) {
System.err.println("Failed to get matches for " + clazz.getCanonicalName());
ex.printStackTrace();
Debug.echoError(ex);
return null;
}
}
public static ValueOfInterface getValueOfFor(Class clazz) {
try {
final MethodHandles.Lookup lookup = MethodHandles.lookup();
CallSite site = LambdaMetafactory.metafactory(lookup, "valueOf", // ValueOfInterface#valueOf
MethodType.methodType(ValueOfInterface.class), // Signature of invoke method
MethodType.methodType(ObjectTag.class, String.class, TagContext.class), // signature of ValueOfInterface#valueOf
lookup.findStatic(clazz, "valueOf", MethodType.methodType(clazz, String.class, TagContext.class)), // signature of original valueOf method
MethodType.methodType(clazz, String.class, TagContext.class)); // Signature of original valueOf again
return (ValueOfInterface) site.getTarget().invoke();
}
catch (Throwable ex) {
System.err.println("Failed to get valueOf for " + clazz.getCanonicalName());
ex.printStackTrace();
Debug.echoError(ex);
return null;
}
}
@Deprecated
public static void registerWithObjectFetcher(Class<? extends ObjectTag> objectTag) {
registerWithObjectFetcher(objectTag, null);
}
public static <T extends ObjectTag> void registerWithObjectFetcher(Class<T> objectTag, ObjectTagProcessor<T> processor) {
ObjectType newType = new ObjectType();
newType.clazz = objectTag;
newType.tagProcessor = processor;
newType.isAdjustable = Adjustable.class.isAssignableFrom(objectTag);
objectsByClass.put(objectTag, newType);
try {
Method valueOfMethod = objectTag.getMethod("valueOf", String.class, TagContext.class);
if (valueOfMethod.isAnnotationPresent(Fetchable.class)) {
String identifier = valueOfMethod.getAnnotation(Fetchable.class).value();
objectsByPrefix.put(CoreUtilities.toLowerCase(identifier.trim()), newType);
newType.prefix = identifier;
}
else {
Debug.echoError("Type '" + objectTag.getSimpleName() + "' registered as an object type, but doesn't have a fetcher prefix.");
}
newType.matches = getMatchesFor(objectTag);
newType.valueOf = getValueOfFor(objectTag);
for (Method registerMethod: objectTag.getDeclaredMethods()) {
if (registerMethod.getName().equals("registerTags") && registerMethod.getParameterCount() == 0) {
registerMethod.invoke(null);
}
}
}
catch (Throwable e) {
Debug.echoError("Failed to initialize an object type(" + objectTag.getSimpleName() + "): ");
Debug.echoError(e);
}
}
public static boolean canFetch(String id) {
return objectsByPrefix.containsKey(CoreUtilities.toLowerCase(id));
}
public static Class getObjectClass(String id) {
if (canFetch(id)) {
return objectsByPrefix.get(CoreUtilities.toLowerCase(id)).clazz;
}
else {
return null;
}
}
public static boolean isObjectWithProperties(String input) {
return input.indexOf('[') != -1 && input.lastIndexOf(']') == input.length() - 1;
}
public static boolean checkMatch(Class<? extends ObjectTag> dClass, String value) {
if (value == null || dClass == null) {
return false;
}
int firstBracket = value.indexOf('[');
if (firstBracket != -1 && value.lastIndexOf(']') == value.length() - 1) {
value = value.substring(0, firstBracket);
}
try {
return objectsByClass.get(dClass).matches.matches(value);
}
catch (Exception e) {
Debug.echoError(e);
}
return false;
}
@Deprecated
public static <T extends ObjectTag> T getObjectFrom(Class<T> dClass, String value) {
return getObjectFrom(dClass, value, CoreUtilities.basicContext);
}
public static List<String> separateProperties(String input) {
if (!isObjectWithProperties(input)) {
return null;
}
ArrayList<String> output = new ArrayList<>(input.length() / 7);
int start = 0;
boolean needObject = true;
int brackets = 0;
for (int i = 0; i < input.length(); i++) {
if (input.charAt(i) == '[' && needObject) {
needObject = false;
output.add(input.substring(start, i));
start = i + 1;
}
else if (input.charAt(i) == '[') {
brackets++;
}
else if (input.charAt(i) == ']' && brackets > 0) {
brackets--;
}
else if ((input.charAt(i) == ';' || input.charAt(i) == ']') && brackets == 0) {
output.add((input.substring(start, i)));
start = i + 1;
}
}
return output;
}
public static <T extends ObjectTag> T getObjectFrom(Class<T> dClass, String value, TagContext context) {
return getObjectFrom((ObjectType<T>) objectsByClass.get(dClass), value, context);
}
public static <T extends ObjectTag> T getObjectFrom(ObjectType<T> type, String value, TagContext context) {
try {
List<String> matches = separateProperties(value);
boolean matched = matches != null && type.isAdjustable;
T gotten = type.valueOf.valueOf(matched ? matches.get(0) : value, context);
if (gotten != null && matched) {
for (int i = 1; i < matches.size(); i++) {
List<String> data = CoreUtilities.split(matches.get(i), '=', 2);
if (data.size() != 2) {
Debug.echoError("Invalid property string '" + matches.get(i) + "'!");
continue;
}
String description = data.get(1);
description = CoreUtilities.replace(description, "&", "&");
description = CoreUtilities.replace(description, "&sc", ";");
((Adjustable) gotten).safeApplyProperty(new Mechanism(new ElementTag(data.get(0)), new ElementTag(description), context));
}
gotten = (T) gotten.fixAfterProperties();
}
return gotten;
}
catch (Exception e) {
Debug.echoError(e);
}
return null;
}
/**
* This function will return the most-valid ObjectTag for the input string.
* If the input lacks @ notation or is not a valid object, an ElementTag will be returned.
*
* @param value the input string.
* @return the most-valid ObjectTag available.
*/
public static ObjectTag pickObjectFor(String value) {
return pickObjectFor(value, DenizenCore.getImplementation().getEmptyScriptEntryData().getTagContext());
}
public static ObjectTag pickObjectFor(String value, TagContext context) {
if (value == null) {
return null;
}
if (CoreUtilities.contains(value, '@')) {
String type = value.split("@", 2)[0];
ObjectType<? extends ObjectTag> toFetch = objectsByPrefix.get(type);
if (toFetch != null) {
ObjectTag fetched = getObjectFrom(toFetch, value, context);
if (fetched != null) {
return fetched;
}
}
}
return new ElementTag(value);
}
}