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PropertyParser.java
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PropertyParser.java
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package com.denizenscript.denizencore.objects.properties;
import com.denizenscript.denizencore.objects.ObjectFetcher;
import com.denizenscript.denizencore.tags.ObjectTagProcessor;
import com.denizenscript.denizencore.tags.TagRunnable;
import com.denizenscript.denizencore.utilities.debugging.Debug;
import com.denizenscript.denizencore.objects.ObjectTag;
import java.lang.invoke.*;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.*;
public class PropertyParser {
@FunctionalInterface
public interface PropertyGetter {
Property get(ObjectTag obj);
}
public static class ClassPropertiesInfo {
public List<PropertyGetter> allProperties = new ArrayList<>();
public List<PropertyGetter> propertiesAnyTags = new ArrayList<>();
public List<PropertyGetter> propertiesAnyMechs = new ArrayList<>();
public List<PropertyGetter> propertiesWithMechs = new ArrayList<>();
public Map<String, PropertyGetter> propertiesByTag = new HashMap<>();
public Map<String, PropertyGetter> propertiesByMechanism = new HashMap<>();
public Map<String, String> propertyNamesByTag = new HashMap<>();
}
public static Map<Class<? extends ObjectTag>, ClassPropertiesInfo> propertiesByClass = new HashMap<>();
public static <T extends ObjectTag> void registerTag(String name, TagRunnable.ObjectInterface<T> runnable, String... variants) {
final PropertyParser.PropertyGetter getter = PropertyParser.currentlyRegisteringProperty;
final Class propertyClass = PropertyParser.currentlyRegisteringPropertyClass;
ObjectTagProcessor<T> tagProcessor = PropertyParser.currentlyRegisteringObjectType.tagProcessor;
tagProcessor.registerTag(name, (attribute, object) -> {
Property prop = getter.get(object);
if (prop == null) {
if (!attribute.hasAlternative()) {
Debug.echoError("Property '" + propertyClass.getSimpleName() + "' does not describe the input object.");
}
return null;
}
return runnable.run(attribute, object);
}, variants);
}
public static Class currentlyRegisteringPropertyClass;
public static PropertyGetter currentlyRegisteringProperty;
public static ObjectFetcher.ObjectType currentlyRegisteringObjectType;
public static void registerPropertyGetter(PropertyGetter getter, Class<? extends ObjectTag> object, String[] tags, String[] mechs, Class property) {
currentlyRegisteringPropertyClass = property;
currentlyRegisteringProperty = getter;
currentlyRegisteringObjectType = ObjectFetcher.objectsByClass.get(object);
boolean didRegisterTags = false;
try {
for (Method registerMethod : property.getDeclaredMethods()) {
if (registerMethod.getName().equals("registerTags") && registerMethod.getParameterCount() == 0) {
registerMethod.invoke(null);
didRegisterTags = true;
}
}
}
catch (Throwable ex) {
Debug.echoError(ex);
}
currentlyRegisteringProperty = null;
currentlyRegisteringObjectType = null;
currentlyRegisteringPropertyClass = null;
ClassPropertiesInfo propInfo = propertiesByClass.get(object);
if (propInfo == null) {
propInfo = new ClassPropertiesInfo();
propertiesByClass.put(object, propInfo);
}
propInfo.allProperties.add(getter);
if (tags != null) {
String propName = property.getSimpleName();
for (String tag : tags) {
propInfo.propertiesByTag.put(tag, getter);
propInfo.propertyNamesByTag.put(tag, propName);
}
}
else if (!didRegisterTags) {
propInfo.propertiesAnyTags.add(getter);
}
if (mechs != null) {
for (String mech : mechs) {
propInfo.propertiesByMechanism.put(mech, getter);
}
propInfo.propertiesWithMechs.add(getter);
}
else {
propInfo.propertiesAnyMechs.add(getter);
propInfo.propertiesWithMechs.add(getter);
}
}
public static String[] getStringField(Class property, String fieldName) {
try {
Field f = property.getDeclaredField(fieldName);
return (String[]) f.get(null);
}
catch (IllegalAccessException e) {
Debug.echoError("Invalid property field '" + fieldName + "' for property class '" + property.getSimpleName() + "': field is not a String[]: " + e.getMessage() + "!");
}
catch (NoSuchFieldException e) {
// Ignore this exception.
}
return null;
}
public static void registerProperty(final Class property, Class<? extends ObjectTag> object, PropertyGetter getter) {
registerPropertyGetter(getter, object, getStringField(property, "handledTags"), getStringField(property, "handledMechs"), property);
}
public static void registerProperty(final Class property, Class<? extends ObjectTag> object) {
try {
final MethodHandles.Lookup lookup = MethodHandles.lookup();
CallSite site = LambdaMetafactory.metafactory(lookup, "get", // PropertyGetter#get
MethodType.methodType(PropertyGetter.class), // Signature of invoke method
MethodType.methodType(Property.class, ObjectTag.class), // signature of PropertyGetter#get
lookup.findStatic(property, "getFrom", MethodType.methodType(property, ObjectTag.class)), // signature of getFrom
MethodType.methodType(property, ObjectTag.class)); // Signature of getFrom again
PropertyGetter getter = (PropertyGetter) site.getTarget().invoke();
registerProperty(property, object, getter);
}
catch (Throwable e) {
Debug.echoError("Unable to register property '" + property.getSimpleName() + "'!");
Debug.echoError(e);
}
}
public static String getPropertiesString(ObjectTag object) {
ClassPropertiesInfo properties = propertiesByClass.get(object.getObjectTagClass());
if (properties == null) {
return "";
}
StringBuilder prop_string = new StringBuilder(properties.propertiesWithMechs.size() * 10);
for (PropertyGetter getter : properties.propertiesWithMechs) {
Property property = getter.get(object);
if (property != null) {
String description = property.getPropertyString();
if (description != null) {
prop_string.append(property.getPropertyId()).append('=')
.append(description.replace(';', (char) 0x2011)).append(';');
}
}
}
if (prop_string.length() > 0) {
return "[" + prop_string.substring(0, prop_string.length() - 1) + "]";
}
else {
return "";
}
}
public static List<Property> empty = new ArrayList<>();
public static List<Property> getProperties(ObjectTag object, String attribLow) {
ClassPropertiesInfo properties = propertiesByClass.get(object.getObjectTagClass());
if (properties == null) {
return empty;
}
PropertyGetter getter = properties.propertiesByTag.get(attribLow);
if (getter != null) {
Property prop = getter.get(object);
if (prop == null) {
return empty;
}
return Collections.singletonList(getter.get(object));
}
else {
return getProperties(object);
}
}
public static List<Property> getProperties(ObjectTag object) {
ClassPropertiesInfo properties = propertiesByClass.get(object.getObjectTagClass());
if (properties == null) {
return empty;
}
List<Property> props = new ArrayList<>(properties.allProperties.size());
for (PropertyGetter getter : properties.allProperties) {
Property prop = getter.get(object);
if (prop != null) {
props.add(prop);
}
}
return props;
}
}