Examples with FieldAccessor org.mvel2.optimizers.impl.refl.nodes.FieldAccessor used on opensource projects

Example 1 with FieldAccessor

use of org.mvel2.optimizers.impl.refl.nodes.FieldAccessor in project mvel by mikebrock.

the class ReflectiveAccessorOptimizer method optimizeSetAccessor.

public Accessor optimizeSetAccessor(ParserContext pCtx, char[] property, int start, int offset, Object ctx, Object thisRef, VariableResolverFactory factory, boolean rootThisRef, Object value, Class ingressType) {
    this.rootNode = this.currNode = null;
    this.expr = property;
    this.start = start;
    this.first = true;
    this.length = start + offset;
    this.ctx = ctx;
    this.thisRef = thisRef;
    this.variableFactory = factory;
    this.ingressType = ingressType;
    char[] root = null;
    int split = findLastUnion();
    PropertyVerifier verifier = new PropertyVerifier(property, this.pCtx = pCtx);
    if (split != -1) {
        root = subset(property, 0, split++);
        // todo: must use the property verifier.
        property = subset(property, split, property.length - split);
    }
    if (root != null) {
        this.length = end = (this.expr = root).length;
        compileGetChain();
        ctx = this.val;
    }
    if (ctx == null) {
        throw new PropertyAccessException("could not access property: " + new String(property, this.start, length) + "; parent is null: " + new String(expr), expr, this.start);
    }
    try {
        this.length = end = (this.expr = property).length;
        int st;
        this.cursor = st = 0;
        skipWhitespace();
        if (collection) {
            st = cursor;
            if (cursor == end)
                throw new PropertyAccessException("unterminated '['", expr, this.start);
            if (scanTo(']'))
                throw new PropertyAccessException("unterminated '['", expr, this.start);
            String ex = new String(property, st, cursor - st);
            if (ctx instanceof Map) {
                if (MVEL.COMPILER_OPT_ALLOW_OVERRIDE_ALL_PROPHANDLING && hasPropertyHandler(Map.class)) {
                    propHandlerSet(ex, ctx, Map.class, value);
                } else {
                    // noinspection unchecked
                    ((Map) ctx).put(eval(ex, ctx, variableFactory), convert(value, returnType = verifier.analyze()));
                    addAccessorNode(new MapAccessorNest(ex, returnType));
                }
                return rootNode;
            } else if (ctx instanceof List) {
                if (MVEL.COMPILER_OPT_ALLOW_OVERRIDE_ALL_PROPHANDLING && hasPropertyHandler(List.class)) {
                    propHandlerSet(ex, ctx, List.class, value);
                } else {
                    // noinspection unchecked
                    ((List) ctx).set(eval(ex, ctx, variableFactory, Integer.class), convert(value, returnType = verifier.analyze()));
                    addAccessorNode(new ListAccessorNest(ex, returnType));
                }
                return rootNode;
            } else if (MVEL.COMPILER_OPT_ALLOW_OVERRIDE_ALL_PROPHANDLING && hasPropertyHandler(ctx.getClass())) {
                propHandlerSet(ex, ctx, ctx.getClass(), value);
                return rootNode;
            } else if (ctx.getClass().isArray()) {
                if (MVEL.COMPILER_OPT_ALLOW_OVERRIDE_ALL_PROPHANDLING && hasPropertyHandler(Array.class)) {
                    propHandlerSet(ex, ctx, Array.class, value);
                } else {
                    // noinspection unchecked
                    Array.set(ctx, eval(ex, ctx, variableFactory, Integer.class), convert(value, getBaseComponentType(ctx.getClass())));
                    addAccessorNode(new ArrayAccessorNest(ex));
                }
                return rootNode;
            } else {
                throw new PropertyAccessException("cannot bind to collection property: " + new String(property) + ": not a recognized collection type: " + ctx.getClass(), expr, this.st);
            }
        } else if (MVEL.COMPILER_OPT_ALLOW_OVERRIDE_ALL_PROPHANDLING && hasPropertyHandler(ctx.getClass())) {
            propHandlerSet(new String(property), ctx, ctx.getClass(), value);
            return rootNode;
        }
        String tk = new String(property, 0, length);
        if (hasSetListeners()) {
            notifySetListeners(ctx, tk, variableFactory, value);
            addAccessorNode(new Notify(tk));
        }
        Member member = getFieldOrWriteAccessor(ctx.getClass(), tk, value == null ? null : ingressType);
        if (member instanceof Field) {
            Field fld = (Field) member;
            if (value != null && !fld.getType().isAssignableFrom(value.getClass())) {
                if (!canConvert(fld.getType(), value.getClass())) {
                    throw new CompileException("cannot convert type: " + value.getClass() + ": to " + fld.getType(), this.expr, this.start);
                }
                fld.set(ctx, convert(value, fld.getType()));
                addAccessorNode(new DynamicFieldAccessor(fld));
            } else if (value == null && fld.getType().isPrimitive()) {
                fld.set(ctx, PropertyTools.getPrimitiveInitialValue(fld.getType()));
                addAccessorNode(new FieldAccessor(fld));
            } else {
                fld.set(ctx, value);
                addAccessorNode(new FieldAccessor(fld));
            }
        } else if (member != null) {
            Method meth = (Method) member;
            if (value != null && !meth.getParameterTypes()[0].isAssignableFrom(value.getClass())) {
                if (!canConvert(meth.getParameterTypes()[0], value.getClass())) {
                    throw new CompileException("cannot convert type: " + value.getClass() + ": to " + meth.getParameterTypes()[0], this.expr, this.start);
                }
                meth.invoke(ctx, convert(value, meth.getParameterTypes()[0]));
            } else if (value == null && meth.getParameterTypes()[0].isPrimitive()) {
                meth.invoke(ctx, PropertyTools.getPrimitiveInitialValue(meth.getParameterTypes()[0]));
            } else {
                meth.invoke(ctx, value);
            }
            addAccessorNode(new SetterAccessor(meth));
        } else if (ctx instanceof Map) {
            // noinspection unchecked
            ((Map) ctx).put(tk, value);
            addAccessorNode(new MapAccessor(tk));
        } else {
            throw new PropertyAccessException("could not access property (" + tk + ") in: " + ingressType.getName(), this.expr, this.start);
        }
    } catch (InvocationTargetException e) {
        throw new PropertyAccessException("could not access property: " + new String(property), this.expr, st, e);
    } catch (IllegalAccessException e) {
        throw new PropertyAccessException("could not access property: " + new String(property), this.expr, st, e);
    } catch (IllegalArgumentException e) {
        throw new PropertyAccessException("error binding property: " + new String(property) + " (value <<" + value + ">>::" + (value == null ? "null" : value.getClass().getCanonicalName()) + ")", this.expr, st, e);
    }
    return rootNode;
}

Example 2 with FieldAccessor

use of org.mvel2.optimizers.impl.refl.nodes.FieldAccessor in project drools by kiegroup.

the class ConditionAnalyzer method analyzeAccessorInvocation.

private Invocation analyzeAccessorInvocation(AccessorNode accessorNode, ASTNode containingNode, Invocation formerInvocation, Class<?> variableType) {
    if (accessorNode instanceof GetterAccessor) {
        return new MethodInvocation(((GetterAccessor) accessorNode).getMethod(), variableType == null ? conditionClass : variableType.getName());
    }
    if (accessorNode instanceof MethodAccessor) {
        MethodAccessor methodAccessor = (MethodAccessor) accessorNode;
        Method method = methodAccessor.getMethod();
        MethodInvocation invocation = new MethodInvocation(method);
        boolean isVarArgs = method.isVarArgs();
        readInvocationParams(invocation, methodAccessor.getParms(), methodAccessor.getParameterTypes(), isVarArgs);
        return invocation;
    }
    if (accessorNode instanceof ConstructorAccessor) {
        ConstructorAccessor constructorAccessor = (ConstructorAccessor) accessorNode;
        Constructor constructor = constructorAccessor.getConstructor();
        ConstructorInvocation invocation = new ConstructorInvocation(constructor);
        readInvocationParams(invocation, constructorAccessor.getParameters(), constructorAccessor.getParameterTypes(), constructor.isVarArgs());
        return invocation;
    }
    if (accessorNode instanceof ArrayAccessor) {
        ArrayAccessor arrayAccessor = (ArrayAccessor) accessorNode;
        return new ArrayAccessInvocation(formerInvocation != null ? formerInvocation.getReturnType() : Object[].class, new FixedExpression(int.class, arrayAccessor.getIndex()));
    }
    if (accessorNode instanceof ArrayAccessorNest) {
        ArrayAccessorNest arrayAccessorNest = (ArrayAccessorNest) accessorNode;
        ExecutableAccessor index = (ExecutableAccessor) arrayAccessorNest.getIndex();
        return new ArrayAccessInvocation(formerInvocation != null ? formerInvocation.getReturnType() : Object[].class, analyzeNode(index.getNode()));
    }
    if (accessorNode instanceof ArrayLength) {
        return new ArrayLengthInvocation();
    }
    if (accessorNode instanceof ListAccessor) {
        Class<?> listType = getListType(formerInvocation);
        ListAccessor listAccessor = (ListAccessor) accessorNode;
        return new ListAccessInvocation(listType, new FixedExpression(int.class, listAccessor.getIndex()));
    }
    if (accessorNode instanceof ListAccessorNest) {
        Class<?> listType = getListType(formerInvocation);
        ListAccessorNest listAccessorNest = (ListAccessorNest) accessorNode;
        ExecutableAccessor index = (ExecutableAccessor) listAccessorNest.getIndex();
        return new ListAccessInvocation(listType, analyzeNode(index.getNode()));
    }
    if (accessorNode instanceof MapAccessor) {
        MapAccessor mapAccessor = (MapAccessor) accessorNode;
        return new MapAccessInvocation(Object.class, Object.class, new FixedExpression(Object.class, mapAccessor.getProperty()));
    }
    if (accessorNode instanceof MapAccessorNest) {
        Class<?> keyType = Object.class;
        Class<?> valueType = Object.class;
        Type[] generics = getGenerics(formerInvocation);
        if (generics != null && generics.length == 2 && generics[0] instanceof Class) {
            keyType = (Class<?>) generics[0];
            if (generics[1] instanceof Class)
                valueType = (Class<?>) generics[1];
        }
        MapAccessorNest mapAccessor = (MapAccessorNest) accessorNode;
        ExecutableStatement statement = mapAccessor.getProperty();
        if (statement instanceof ExecutableLiteral) {
            return new MapAccessInvocation(keyType, valueType, new FixedExpression(keyType, ((ExecutableLiteral) statement).getLiteral()));
        } else {
            return new MapAccessInvocation(keyType, valueType, analyzeNode(((ExecutableAccessor) statement).getNode()));
        }
    }
    if (accessorNode instanceof FieldAccessor) {
        return new FieldAccessInvocation(((FieldAccessor) accessorNode).getField());
    }
    if (accessorNode instanceof StaticVarAccessor) {
        Field field = ((StaticVarAccessor) accessorNode).getField();
        return new FieldAccessInvocation(field);
    }
    if (accessorNode instanceof ThisValueAccessor) {
        return new ThisInvocation(accessorNode.getNextNode() == null ? containingNode.getEgressType() : Object.class);
    }
    throw new RuntimeException("Unknown AccessorNode type: " + accessorNode.getClass().getName());
}