Examples with Accessor org.mvel2.compiler.Accessor used on opensource projects

Example 21 with Accessor

use of org.mvel2.compiler.Accessor in project drools by kiegroup.

the class ConditionAnalyzer method analyzeNodeAccessor.

private Expression analyzeNodeAccessor(Accessor accessor, ASTNode node) {
    AccessorNode accessorNode;
    if (accessor instanceof DynamicGetAccessor) {
        accessorNode = (AccessorNode) ((DynamicGetAccessor) accessor).getSafeAccessor();
    } else if (accessor instanceof AccessorNode) {
        accessorNode = (AccessorNode) accessor;
    } else if (accessor instanceof CompiledExpression) {
        return analyzeNode(((CompiledExpression) accessor).getFirstNode());
    } else if (accessor instanceof ListCreator) {
        return analyzeListCreation(((ListCreator) accessor));
    } else if (accessor instanceof ArrayCreator) {
        return analyzeArrayCreation(((ArrayCreator) accessor));
    } else {
        throw new RuntimeException("Unknown accessor type: " + accessor);
    }
    if (accessorNode instanceof VariableAccessor) {
        if (isStaticAccessor(accessorNode)) {
            while (accessorNode instanceof VariableAccessor) {
                accessorNode = accessorNode.getNextNode();
            }
        } else {
            return analyzeNodeAccessor(accessorNode, node);
        }
    }
    while (accessorNode instanceof StaticReferenceAccessor) {
        StaticReferenceAccessor staticReferenceAccessor = ((StaticReferenceAccessor) accessorNode);
        Object literal = staticReferenceAccessor.getLiteral();
        accessorNode = accessorNode.getNextNode();
        if (accessorNode == null) {
            return new FixedExpression(literal.getClass(), literal);
        }
    }
    return analyzeExpressionNode(accessorNode, node, null);
}

Example 22 with Accessor

use of org.mvel2.compiler.Accessor in project drools by kiegroup.

the class ConditionAnalyzer method getArrayCreationExpression.

private ArrayCreationExpression getArrayCreationExpression(Class<?> arrayType, Class<?> type, Accessor[] accessors) {
    ArrayCreationExpression arrayExpression = new ArrayCreationExpression(arrayType);
    for (Accessor accessor : accessors) {
        ExecutableStatement statement = ((ExprValueAccessor) accessor).getStmt();
        arrayExpression.addItem(statementToExpression(statement, type));
    }
    return arrayExpression;
}

Example 23 with Accessor

use of org.mvel2.compiler.Accessor in project mvel by mikebrock.

the class ReflectiveAccessorOptimizer method optimizeCollection.

public Accessor optimizeCollection(ParserContext pCtx, Object o, Class type, char[] property, int start, int offset, Object ctx, Object thisRef, VariableResolverFactory factory) {
    this.start = this.cursor = start;
    this.length = start + offset;
    this.returnType = type;
    this.ctx = ctx;
    this.variableFactory = factory;
    this.pCtx = pCtx;
    Accessor root = _getAccessor(o, returnType);
    if (property != null && length > start) {
        return new Union(root, property, cursor, offset);
    } else {
        return root;
    }
}

Example 24 with Accessor

use of org.mvel2.compiler.Accessor 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 25 with Accessor

use of org.mvel2.compiler.Accessor in project mvel by mikebrock.

the class ReflectiveAccessorOptimizer method get.

public static Object get(String expression, Object ctx) {
    int hash = createSignatureHash(expression, ctx);
    Accessor accessor = REFLECTIVE_ACCESSOR_CACHE.get(hash);
    if (accessor != null) {
        return accessor.getValue(ctx, null, null);
    } else {
        REFLECTIVE_ACCESSOR_CACHE.put(hash, accessor = new ReflectiveAccessorOptimizer().optimizeAccessor(getCurrentThreadParserContext(), expression.toCharArray(), 0, expression.length(), ctx, null, null, false, null));
        return accessor.getValue(ctx, null, null);
    }
}