mirror of
https://github.com/plexusorg/Plex-FAWE.git
synced 2024-12-23 17:57:38 +00:00
Added support for assignable function results.
Also: - Added megabuf(index) as a first, temporary example - Introduced a new Node class at the top of the hierarchy for the runtime. - RValue and LValue are now interfaces - Narrowed down some exception declarations - Optimized the optimizer for functions
This commit is contained in:
parent
7812d8f5f8
commit
0c9c213e4e
@ -41,8 +41,9 @@ public interface Identifiable {
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*
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* Invokables:
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* c - Constant
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* f - Function
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* v - Variable
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* f - Function
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* l - LValueFunction
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* </pre>
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*/
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public abstract char id();
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@ -24,7 +24,7 @@ package com.sk89q.worldedit.expression.runtime;
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*
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* @author TomyLobo
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*/
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public final class Constant extends RValue {
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public final class Constant extends Node {
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private final double value;
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public Constant(int position, double value) {
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@ -29,7 +29,7 @@ import java.lang.reflect.Method;
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*
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* @author TomyLobo
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*/
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public class Function extends RValue {
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public class Function extends Node {
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/**
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* Add this annotation on functions that don't always return the same value for the same inputs.
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*/
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@ -47,8 +47,12 @@ public class Function extends RValue {
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@Override
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public final double getValue() throws EvaluationException {
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return invokeMethod(method, args);
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}
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protected static final double invokeMethod(Method method, Object[] args) throws EvaluationException {
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try {
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return (Double) method.invoke(null, (Object[]) args);
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return (Double) method.invoke(null, args);
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} catch (InvocationTargetException e) {
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if (e.getTargetException() instanceof EvaluationException) {
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throw (EvaluationException) e.getTargetException();
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@ -79,7 +83,7 @@ public class Function extends RValue {
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}
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@Override
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public RValue optimize() throws EvaluationException {
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public Node optimize() throws EvaluationException {
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final RValue[] optimizedArgs = new RValue[args.length];
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boolean optimizable = !method.isAnnotationPresent(Dynamic.class);
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int position = getPosition();
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@ -96,7 +100,9 @@ public class Function extends RValue {
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}
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if (optimizable) {
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return new Constant(position, getValue());
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return new Constant(position, invokeMethod(method, optimizedArgs));
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} else if (this instanceof LValueFunction) {
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return new LValueFunction(position, method, ((LValueFunction) this).setter, optimizedArgs);
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} else {
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return new Function(position, method, optimizedArgs);
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}
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@ -25,6 +25,8 @@ import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import com.sk89q.worldedit.expression.runtime.Function.Dynamic;
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/**
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* Contains all functions that can be used in expressions.
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*
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@ -34,13 +36,24 @@ public final class Functions {
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private static class Overload {
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private final Method method;
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private final int mask;
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private final boolean isSetter;
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public Overload(Method method) throws IllegalArgumentException {
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this.method = method;
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boolean isSetter = false;
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int accum = 0;
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Class<?>[] parameters = method.getParameterTypes();
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for (Class<?> parameter : parameters) {
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if (isSetter) {
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throw new IllegalArgumentException("Method takes arguments that can't be cast to RValue.");
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}
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if (double.class.equals(parameter)) {
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isSetter = true;
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continue;
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}
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if (!RValue.class.isAssignableFrom(parameter)) {
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throw new IllegalArgumentException("Method takes arguments that can't be cast to RValue.");
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}
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@ -54,9 +67,14 @@ public final class Functions {
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}
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}
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mask = accum;
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this.isSetter = isSetter;
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}
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public boolean matches(boolean isSetter, RValue... args) {
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if (this.isSetter != isSetter) {
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return false;
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}
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public boolean matches(RValue... args) {
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int accum = 0;
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for (RValue argument : args) {
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accum <<= 2;
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@ -74,14 +92,21 @@ public final class Functions {
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public static final Function getFunction(int position, String name, RValue... args) throws NoSuchMethodException {
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return new Function(position, getMethod(name, args), args);
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final Method getter = getMethod(name, false, args);
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try {
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Method setter = getMethod(name, true, args);
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return new LValueFunction(position, getter, setter, args);
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}
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catch (NoSuchMethodException e) {
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return new Function(position, getter, args);
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}
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}
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private static Method getMethod(String name, RValue... args) throws NoSuchMethodException {
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private static Method getMethod(String name, boolean isSetter, RValue... args) throws NoSuchMethodException {
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final List<Overload> overloads = functions.get(name);
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if (overloads != null) {
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for (Overload overload : overloads) {
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if (overload.matches(args)) {
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if (overload.matches(isSetter, args)) {
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return overload.method;
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}
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}
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@ -93,9 +118,16 @@ public final class Functions {
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private static final Map<String, List<Overload>> functions = new HashMap<String, List<Overload>>();
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static {
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for (Method method : Functions.class.getMethods()) {
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try {
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addFunction(method);
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} catch(IllegalArgumentException e) {}
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}
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}
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public static void addFunction(Method method) throws IllegalArgumentException {
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final String methodName = method.getName();
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try {
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Overload overload = new Overload(method);
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List<Overload> overloads = functions.get(methodName);
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@ -104,114 +136,112 @@ public final class Functions {
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}
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overloads.add(overload);
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} catch(IllegalArgumentException e) {}
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}
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}
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public static final double sin(RValue x) throws Exception {
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public static final double sin(RValue x) throws EvaluationException {
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return Math.sin(x.getValue());
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}
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public static final double cos(RValue x) throws Exception {
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public static final double cos(RValue x) throws EvaluationException {
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return Math.cos(x.getValue());
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}
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public static final double tan(RValue x) throws Exception {
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public static final double tan(RValue x) throws EvaluationException {
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return Math.tan(x.getValue());
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}
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public static final double asin(RValue x) throws Exception {
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public static final double asin(RValue x) throws EvaluationException {
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return Math.asin(x.getValue());
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}
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public static final double acos(RValue x) throws Exception {
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public static final double acos(RValue x) throws EvaluationException {
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return Math.acos(x.getValue());
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}
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public static final double atan(RValue x) throws Exception {
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public static final double atan(RValue x) throws EvaluationException {
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return Math.atan(x.getValue());
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}
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public static final double atan2(RValue y, RValue x) throws Exception {
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public static final double atan2(RValue y, RValue x) throws EvaluationException {
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return Math.atan2(y.getValue(), x.getValue());
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}
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public static final double sinh(RValue x) throws Exception {
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public static final double sinh(RValue x) throws EvaluationException {
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return Math.sinh(x.getValue());
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}
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public static final double cosh(RValue x) throws Exception {
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public static final double cosh(RValue x) throws EvaluationException {
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return Math.cosh(x.getValue());
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}
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public static final double tanh(RValue x) throws Exception {
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public static final double tanh(RValue x) throws EvaluationException {
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return Math.tanh(x.getValue());
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}
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public static final double sqrt(RValue x) throws Exception {
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public static final double sqrt(RValue x) throws EvaluationException {
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return Math.sqrt(x.getValue());
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}
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public static final double cbrt(RValue x) throws Exception {
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public static final double cbrt(RValue x) throws EvaluationException {
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return Math.cbrt(x.getValue());
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}
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public static final double abs(RValue x) throws Exception {
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public static final double abs(RValue x) throws EvaluationException {
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return Math.abs(x.getValue());
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}
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public static final double min(RValue a, RValue b) throws Exception {
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public static final double min(RValue a, RValue b) throws EvaluationException {
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return Math.min(a.getValue(), b.getValue());
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}
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public static final double min(RValue a, RValue b, RValue c) throws Exception {
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public static final double min(RValue a, RValue b, RValue c) throws EvaluationException {
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return Math.min(a.getValue(), Math.min(b.getValue(), c.getValue()));
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}
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public static final double max(RValue a, RValue b) throws Exception {
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public static final double max(RValue a, RValue b) throws EvaluationException {
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return Math.max(a.getValue(), b.getValue());
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}
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public static final double max(RValue a, RValue b, RValue c) throws Exception {
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public static final double max(RValue a, RValue b, RValue c) throws EvaluationException {
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return Math.max(a.getValue(), Math.max(b.getValue(), c.getValue()));
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}
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public static final double ceil(RValue x) throws Exception {
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public static final double ceil(RValue x) throws EvaluationException {
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return Math.ceil(x.getValue());
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}
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public static final double floor(RValue x) throws Exception {
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public static final double floor(RValue x) throws EvaluationException {
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return Math.floor(x.getValue());
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}
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public static final double rint(RValue x) throws Exception {
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public static final double rint(RValue x) throws EvaluationException {
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return Math.rint(x.getValue());
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}
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public static final double round(RValue x) throws Exception {
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public static final double round(RValue x) throws EvaluationException {
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return Math.round(x.getValue());
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}
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public static final double exp(RValue x) throws Exception {
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public static final double exp(RValue x) throws EvaluationException {
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return Math.exp(x.getValue());
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}
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public static final double ln(RValue x) throws Exception {
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public static final double ln(RValue x) throws EvaluationException {
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return Math.log(x.getValue());
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}
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public static final double log(RValue x) throws Exception {
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public static final double log(RValue x) throws EvaluationException {
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return Math.log(x.getValue());
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}
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public static final double log10(RValue x) throws Exception {
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public static final double log10(RValue x) throws EvaluationException {
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return Math.log10(x.getValue());
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}
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@ -230,4 +260,17 @@ public final class Functions {
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return 0;
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}
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private static final double[] megabuf = new double[1024];
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@Dynamic
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public static final double megabuf(RValue index) throws EvaluationException {
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return megabuf[(int) index.getValue()];
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}
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@Dynamic
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public static final double megabuf(RValue index, double value) throws EvaluationException {
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return megabuf[(int) index.getValue()] = value;
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}
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}
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@ -24,10 +24,6 @@ package com.sk89q.worldedit.expression.runtime;
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*
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* @author TomyLobo
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*/
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public abstract class LValue extends RValue {
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public LValue(int position) {
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super(position);
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}
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public abstract double assign(double value) throws EvaluationException;
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public interface LValue extends RValue {
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public double assign(double value) throws EvaluationException;
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}
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@ -0,0 +1,51 @@
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// $Id$
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/*
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* WorldEdit
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* Copyright (C) 2010, 2011 sk89q <http://www.sk89q.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package com.sk89q.worldedit.expression.runtime;
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import java.lang.reflect.Method;
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/**
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* Wrapper for a Java method and its arguments (other Invokables)
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*
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* @author TomyLobo
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*/
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public class LValueFunction extends Function implements LValue {
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private final Object[] setterArgs;
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final Method setter;
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LValueFunction(int position, Method getter, Method setter, RValue... args) {
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super(position, getter, args);
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setterArgs = new Object[args.length + 1];
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System.arraycopy(args, 0, setterArgs, 0, args.length);
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this.setter = setter;
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}
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@Override
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public char id() {
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return 'l';
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}
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@Override
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public double assign(double value) throws EvaluationException {
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setterArgs[setterArgs.length - 1] = value;
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return invokeMethod(setter, setterArgs);
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}
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}
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@ -0,0 +1,45 @@
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// $Id$
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/*
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* WorldEdit
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* Copyright (C) 2010, 2011 sk89q <http://www.sk89q.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package com.sk89q.worldedit.expression.runtime;
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/**
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* A value that can be used on the right side of an assignment.
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*
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* @author TomyLobo
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*/
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public abstract class Node implements RValue {
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private final int position;
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public Node(int position) {
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this.position = position;
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}
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@Override
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public abstract String toString();
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public Node optimize() throws EvaluationException {
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return this;
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}
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@Override
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public int getPosition() {
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return position;
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}
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}
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@ -26,25 +26,7 @@ import com.sk89q.worldedit.expression.Identifiable;
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*
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* @author TomyLobo
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*/
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public abstract class RValue implements Identifiable {
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private final int position;
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public RValue(int position) {
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super();
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this.position = position;
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}
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public abstract double getValue() throws EvaluationException;
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@Override
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public abstract String toString();
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public RValue optimize() throws EvaluationException {
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return this;
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}
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@Override
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public int getPosition() {
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return position;
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}
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public interface RValue extends Identifiable {
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public double getValue() throws EvaluationException;
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public Node optimize() throws EvaluationException;
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}
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@ -27,7 +27,7 @@ import java.util.List;
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*
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* @author TomyLobo
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*/
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public class Sequence extends RValue {
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public class Sequence extends Node {
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private final RValue[] sequence;
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public Sequence(int position, RValue... sequence) {
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@ -66,7 +66,7 @@ public class Sequence extends RValue {
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}
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@Override
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public RValue optimize() throws EvaluationException {
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public Node optimize() throws EvaluationException {
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List<RValue> newSequence = new ArrayList<RValue>();
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for (RValue invokable : sequence) {
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@ -24,7 +24,7 @@ package com.sk89q.worldedit.expression.runtime;
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*
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* @author TomyLobo
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*/
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public final class Variable extends LValue {
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public final class Variable extends Node implements LValue {
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public double value;
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public Variable(double value) {
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