Examples with StringAppender org.mvel2.util.StringAppender used on opensource projects

Example 21 with StringAppender

use of org.mvel2.util.StringAppender in project mvel by mikebrock.

the class ReflectiveAccessorOptimizer method getMethod.

/**
 * Find an appropriate method, execute it, and return it's response.
 *
 * @param ctx  -
 * @param name -
 * @return -
 * @throws Exception -
 */
@SuppressWarnings({ "unchecked" })
private Object getMethod(Object ctx, String name) throws Exception {
    int st = cursor;
    String tk = cursor != end && expr[cursor] == '(' && ((cursor = balancedCapture(expr, cursor, '(')) - st) > 1 ? new String(expr, st + 1, cursor - st - 1) : "";
    cursor++;
    Object[] args;
    Class[] argTypes;
    ExecutableStatement[] es;
    if (tk.length() == 0) {
        args = ParseTools.EMPTY_OBJ_ARR;
        argTypes = ParseTools.EMPTY_CLS_ARR;
        es = null;
    } else {
        List<char[]> subtokens = parseParameterList(tk.toCharArray(), 0, -1);
        es = new ExecutableStatement[subtokens.size()];
        args = new Object[subtokens.size()];
        argTypes = new Class[subtokens.size()];
        for (int i = 0; i < subtokens.size(); i++) {
            try {
                args[i] = (es[i] = (ExecutableStatement) subCompileExpression(subtokens.get(i), pCtx)).getValue(this.thisRef, thisRef, variableFactory);
            } catch (CompileException e) {
                throw ErrorUtil.rewriteIfNeeded(e, this.expr, this.start);
            }
            if (es[i].isExplicitCast())
                argTypes[i] = es[i].getKnownEgressType();
        }
        if (pCtx.isStrictTypeEnforcement()) {
            for (int i = 0; i < args.length; i++) {
                argTypes[i] = es[i].getKnownEgressType();
            }
        } else {
            for (int i = 0; i < args.length; i++) {
                if (argTypes[i] != null)
                    continue;
                if (es[i].getKnownEgressType() == Object.class) {
                    argTypes[i] = args[i] == null ? null : args[i].getClass();
                } else {
                    argTypes[i] = es[i].getKnownEgressType();
                }
            }
        }
    }
    if (first && variableFactory != null && variableFactory.isResolveable(name)) {
        Object ptr = variableFactory.getVariableResolver(name).getValue();
        if (ptr instanceof Method) {
            ctx = ((Method) ptr).getDeclaringClass();
            name = ((Method) ptr).getName();
        } else if (ptr instanceof MethodStub) {
            ctx = ((MethodStub) ptr).getClassReference();
            name = ((MethodStub) ptr).getMethodName();
        } else if (ptr instanceof Function) {
            Function func = (Function) ptr;
            if (!name.equals(func.getName())) {
                getBeanProperty(ctx, name);
                addAccessorNode(new DynamicFunctionAccessor(es));
            } else {
                addAccessorNode(new FunctionAccessor((Function) ptr, es));
            }
            return ((Function) ptr).call(ctx, thisRef, variableFactory, args);
        } else {
            throw new OptimizationFailure("attempt to optimize a method call for a reference that does not point to a method: " + name + " (reference is type: " + (ctx != null ? ctx.getClass().getName() : null) + ")");
        }
        first = false;
    }
    if (ctx == null) {
        throw new PropertyAccessException("null pointer or function not found: " + name, this.expr, this.start);
    }
    boolean classTarget = false;
    Class<?> cls = currType != null ? currType : ((classTarget = ctx instanceof Class) ? (Class<?>) ctx : ctx.getClass());
    currType = null;
    Method m;
    Class[] parameterTypes = null;
    if ((m = getBestCandidate(argTypes, name, cls, cls.getMethods(), false, classTarget)) != null) {
        parameterTypes = m.getParameterTypes();
    }
    if (m == null && classTarget) {
        /**
         * If we didn't find anything, maybe we're looking for the actual java.lang.Class methods.
         */
        if ((m = getBestCandidate(argTypes, name, cls, Class.class.getMethods(), false)) != null) {
            parameterTypes = m.getParameterTypes();
        }
    }
    if (m == null) {
        StringAppender errorBuild = new StringAppender();
        if ("size".equals(name) && args.length == 0 && cls.isArray()) {
            addAccessorNode(new ArrayLength());
            return getLength(ctx);
        }
        for (int i = 0; i < args.length; i++) {
            errorBuild.append(args[i] != null ? args[i].getClass().getName() : null);
            if (i < args.length - 1)
                errorBuild.append(", ");
        }
        throw new PropertyAccessException("unable to resolve method: " + cls.getName() + "." + name + "(" + errorBuild.toString() + ") [arglength=" + args.length + "]", this.expr, this.st);
    } else {
        if (es != null) {
            ExecutableStatement cExpr;
            for (int i = 0; i < es.length; i++) {
                cExpr = (ExecutableStatement) es[i];
                if (cExpr.getKnownIngressType() == null) {
                    cExpr.setKnownIngressType(parameterTypes[i]);
                    cExpr.computeTypeConversionRule();
                }
                if (!cExpr.isConvertableIngressEgress()) {
                    args[i] = convert(args[i], parameterTypes[i]);
                }
            }
        } else {
            /**
             * Coerce any types if required.
             */
            for (int i = 0; i < args.length; i++) args[i] = convert(args[i], parameterTypes[i]);
        }
        Object o = getWidenedTarget(m).invoke(ctx, args);
        if (hasNullMethodHandler()) {
            addAccessorNode(new MethodAccessorNH(getWidenedTarget(m), (ExecutableStatement[]) es, getNullMethodHandler()));
            if (o == null)
                o = getNullMethodHandler().getProperty(m.getName(), ctx, variableFactory);
        } else {
            addAccessorNode(new MethodAccessor(getWidenedTarget(m), (ExecutableStatement[]) es));
        }
        /**
         * return the response.
         */
        return o;
    }
}

Example 22 with StringAppender

use of org.mvel2.util.StringAppender in project mvel by mikebrock.

the class ObjectInspector method renderMethods.

private static void renderMethods(Class cls) {
    Method[] methods = cls.getMethods();
    Method m;
    StringAppender appender = new StringAppender();
    int mf;
    for (int i = 0; i < methods.length; i++) {
        appender.append(TextUtil.paint(' ', PADDING + 2));
        if (((mf = (m = methods[i]).getModifiers()) & Modifier.PUBLIC) != 0)
            appender.append("public");
        else if ((mf & Modifier.PRIVATE) != 0)
            appender.append("private");
        else if ((mf & Modifier.PROTECTED) != 0)
            appender.append("protected");
        appender.append(' ').append(m.getReturnType().getName()).append(' ').append(m.getName()).append("(");
        Class[] parmTypes = m.getParameterTypes();
        for (int y = 0; y < parmTypes.length; y++) {
            if (parmTypes[y].isArray()) {
                appender.append(parmTypes[y].getComponentType().getName() + "[]");
            } else {
                appender.append(parmTypes[y].getName());
            }
            if ((y + 1) < parmTypes.length)
                appender.append(", ");
        }
        appender.append(")");
        if (m.getDeclaringClass() != cls) {
            appender.append("    [inherited from: ").append(m.getDeclaringClass().getName()).append("]");
        }
        if ((i + 1) < methods.length)
            appender.append('\n');
    }
    System.out.println(appender.toString());
}

Example 23 with StringAppender

use of org.mvel2.util.StringAppender in project mvel by mikebrock.

the class PropertyVerifier method getMethod.

/**
 * Process method
 *
 * @param ctx  - the ingress type
 * @param name - the property component
 * @return known egress type.
 */
private Class getMethod(Class ctx, String name) {
    int st = cursor;
    /**
     * Check to see if this is the first element in the statement.
     */
    if (first) {
        first = false;
        methodCall = true;
        /**
         * It's the first element in the statement, therefore we check to see if there is a static import of a
         * native Java method or an MVEL function.
         */
        if (pCtx.hasImport(name)) {
            Method m = pCtx.getStaticImport(name).getMethod();
            /**
             * Replace the method parameters.
             */
            ctx = m.getDeclaringClass();
            name = m.getName();
        } else if (pCtx.hasFunction(name)) {
            resolvedExternally = false;
            Function f = pCtx.getFunction(name);
            f.checkArgumentCount(parseParameterList((((cursor = balancedCapture(expr, cursor, end, '(')) - st) > 1 ? ParseTools.subset(expr, st + 1, cursor - st - 1) : new char[0]), 0, -1).size());
            return f.getEgressType();
        } else if (pCtx.hasVarOrInput("this")) {
            if (pCtx.isStrictTypeEnforcement()) {
                recordTypeParmsForProperty("this");
            }
            ctx = pCtx.getVarOrInputType("this");
            resolvedExternally = false;
        }
    }
    /**
     * Get the arguments for the method.
     */
    String tk;
    if (cursor < end && expr[cursor] == '(' && ((cursor = balancedCapture(expr, cursor, end, '(')) - st) > 1) {
        tk = new String(expr, st + 1, cursor - st - 1);
    } else {
        tk = "";
    }
    cursor++;
    /**
     * Parse out the arguments list.
     */
    Class[] args;
    List<char[]> subtokens = parseParameterList(tk.toCharArray(), 0, -1);
    if (subtokens.size() == 0) {
        args = new Class[0];
        subtokens = Collections.emptyList();
    } else {
        // ParserContext subCtx = pCtx.createSubcontext();
        args = new Class[subtokens.size()];
        /**
         *  Subcompile all the arguments to determine their known types.
         */
        // ExpressionCompiler compiler;
        List<ErrorDetail> errors = pCtx.getErrorList().isEmpty() ? pCtx.getErrorList() : new ArrayList<ErrorDetail>(pCtx.getErrorList());
        CompileException rethrow = null;
        for (int i = 0; i < subtokens.size(); i++) {
            try {
                args[i] = MVEL.analyze(subtokens.get(i), pCtx);
                if ("null".equals(String.valueOf(subtokens.get(i)))) {
                    args[i] = NullType.class;
                }
            } catch (CompileException e) {
                rethrow = ErrorUtil.rewriteIfNeeded(e, expr, this.st);
            }
            if (errors.size() < pCtx.getErrorList().size()) {
                for (ErrorDetail detail : pCtx.getErrorList()) {
                    if (!errors.contains(detail)) {
                        detail.setExpr(expr);
                        detail.setCursor(new String(expr).substring(this.st).indexOf(new String(subtokens.get(i))) + this.st);
                        detail.setColumn(0);
                        detail.setLineNumber(0);
                        detail.calcRowAndColumn();
                    }
                }
            }
            if (rethrow != null) {
                throw rethrow;
            }
        }
    }
    /**
     * If the target object is an instance of java.lang.Class itself then do not
     * adjust the Class scope target.
     */
    Method m;
    if ((m = getBestCandidate(args, name, ctx, ctx.getMethods(), pCtx.isStrongTyping())) == null) {
        if ((m = getBestCandidate(args, name, ctx, ctx.getDeclaredMethods(), pCtx.isStrongTyping())) == null) {
            StringAppender errorBuild = new StringAppender();
            for (int i = 0; i < args.length; i++) {
                errorBuild.append(args[i] != null ? args[i].getName() : null);
                if (i < args.length - 1)
                    errorBuild.append(", ");
            }
            if (("size".equals(name) || "length".equals(name)) && args.length == 0 && ctx.isArray()) {
                return Integer.class;
            }
            if (pCtx.isStrictTypeEnforcement()) {
                throw new CompileException("unable to resolve method using strict-mode: " + ctx.getName() + "." + name + "(" + errorBuild.toString() + ")", expr, tkStart);
            }
            return Object.class;
        }
    }
    /**
     * If we're in strict mode, we look for generic type information.
     */
    if (pCtx.isStrictTypeEnforcement() && m.getGenericReturnType() != null) {
        Map<String, Class> typeArgs = new HashMap<String, Class>();
        Type[] gpt = m.getGenericParameterTypes();
        Class z;
        ParameterizedType pt;
        for (int i = 0; i < gpt.length; i++) {
            if (gpt[i] instanceof ParameterizedType) {
                pt = (ParameterizedType) gpt[i];
                if ((z = pCtx.getImport(new String(subtokens.get(i)))) != null) {
                    /**
                     * We record the value of the type parameter to our typeArgs Map.
                     */
                    if (pt.getRawType().equals(Class.class)) {
                        /**
                         * If this is an instance of Class, we deal with the special parameterization case.
                         */
                        typeArgs.put(pt.getActualTypeArguments()[0].toString(), z);
                    } else {
                        typeArgs.put(gpt[i].toString(), z);
                    }
                }
            }
        }
        if (pCtx.isStrictTypeEnforcement() && ctx.getTypeParameters().length != 0 && pCtx.getLastTypeParameters() != null && pCtx.getLastTypeParameters().length == ctx.getTypeParameters().length) {
            TypeVariable[] typeVariables = ctx.getTypeParameters();
            for (int i = 0; i < typeVariables.length; i++) {
                typeArgs.put(typeVariables[i].getName(), (Class) pCtx.getLastTypeParameters()[i]);
            }
        }
        /**
         * Get the return type argument
         */
        Type parametricReturnType = m.getGenericReturnType();
        String returnTypeArg = parametricReturnType.toString();
        // push return type parameters onto parser context, only if this is a parametric type
        if (parametricReturnType instanceof ParameterizedType) {
            pCtx.setLastTypeParameters(((ParameterizedType) parametricReturnType).getActualTypeArguments());
        }
        if (paramTypes != null && paramTypes.containsKey(returnTypeArg)) {
            /**
             * If the paramTypes Map contains the known type, return that type.
             */
            return (Class) paramTypes.get(returnTypeArg);
        } else if (typeArgs.containsKey(returnTypeArg)) {
            /**
             * If the generic type was declared as part of the method, it will be in this
             * Map.
             */
            return typeArgs.get(returnTypeArg);
        }
    }
    if (!Modifier.isPublic(m.getModifiers())) {
        StringAppender errorBuild = new StringAppender();
        for (int i = 0; i < args.length; i++) {
            errorBuild.append(args[i] != null ? args[i].getName() : null);
            if (i < args.length - 1)
                errorBuild.append(", ");
        }
        String scope = Modifier.toString(m.getModifiers());
        if (scope.trim().equals(""))
            scope = "<package local>";
        addFatalError("the referenced method is not accessible: " + ctx.getName() + "." + name + "(" + errorBuild.toString() + ")" + " (scope: " + scope + "; required: public", this.tkStart);
    }
    return m.getReturnType();
}

Example 24 with StringAppender

use of org.mvel2.util.StringAppender in project mvel by mikebrock.

the class PropertyAccessor method getMethod.

/**
 * Find an appropriate method, execute it, and return it's response.
 *
 * @param ctx  -
 * @param name -
 * @return -
 * @throws Exception -
 */
@SuppressWarnings({ "unchecked" })
private Object getMethod(Object ctx, String name) {
    int _start = cursor;
    String tk = cursor != end && property[cursor] == '(' && ((cursor = balancedCapture(property, cursor, '(')) - _start) > 1 ? new String(property, _start + 1, cursor - _start - 1) : "";
    cursor++;
    Object[] args;
    if (tk.length() == 0) {
        args = ParseTools.EMPTY_OBJ_ARR;
    } else {
        List<char[]> subtokens = parseParameterList(tk.toCharArray(), 0, -1);
        args = new Object[subtokens.size()];
        for (int i = 0; i < subtokens.size(); i++) {
            args[i] = eval(subtokens.get(i), thisReference, variableFactory);
        }
    }
    if (first && variableFactory != null && variableFactory.isResolveable(name)) {
        Object ptr = variableFactory.getVariableResolver(name).getValue();
        if (ptr instanceof Method) {
            ctx = ((Method) ptr).getDeclaringClass();
            name = ((Method) ptr).getName();
        } else if (ptr instanceof MethodStub) {
            ctx = ((MethodStub) ptr).getClassReference();
            name = ((MethodStub) ptr).getMethodName();
        } else if (ptr instanceof Function) {
            ((Function) ptr).checkArgumentCount(args.length);
            return ((Function) ptr).call(null, thisReference, variableFactory, args);
        } else {
            throw new OptimizationFailure("attempt to optimize a method call for a reference that does not point to a method: " + name + " (reference is type: " + (ctx != null ? ctx.getClass().getName() : null) + ")");
        }
        first = false;
    }
    if (ctx == null)
        throw new CompileException("no such method or function: " + name, property, cursor);
    /**
     * If the target object is an instance of java.lang.Class itself then do not
     * adjust the Class scope target.
     */
    Class cls = (ctx instanceof Class ? (Class) ctx : ctx.getClass());
    if (cls == Proto.ProtoInstance.class) {
        return ((Proto.ProtoInstance) ctx).get(name).call(null, thisReference, variableFactory, args);
    }
    /**
     * Check to see if we have already cached this method;
     */
    Object[] cache = checkMethodCache(cls, createSignature(name, tk));
    Method m;
    Class[] parameterTypes;
    if (cache != null) {
        m = (Method) cache[0];
        parameterTypes = (Class[]) cache[1];
    } else {
        m = null;
        parameterTypes = null;
    }
    /**
     * If we have not cached the method then we need to go ahead and try to resolve it.
     */
    if (m == null) {
        /**
         * Try to find an instance method from the class target.
         */
        if ((m = getBestCandidate(args, name, cls, cls.getMethods(), false)) != null) {
            addMethodCache(cls, createSignature(name, tk), m);
            parameterTypes = m.getParameterTypes();
        }
        if (m == null) {
            /**
             * If we didn't find anything, maybe we're looking for the actual java.lang.Class methods.
             */
            if ((m = getBestCandidate(args, name, cls, cls.getClass().getDeclaredMethods(), false)) != null) {
                addMethodCache(cls, createSignature(name, tk), m);
                parameterTypes = m.getParameterTypes();
            }
        }
    }
    if (m == null) {
        StringAppender errorBuild = new StringAppender();
        for (int i = 0; i < args.length; i++) {
            errorBuild.append(args[i] != null ? args[i].getClass().getName() : null);
            if (i < args.length - 1)
                errorBuild.append(", ");
        }
        if ("size".equals(name) && args.length == 0 && cls.isArray()) {
            return getLength(ctx);
        }
        System.out.println("{ " + new String(property) + " }");
        throw new PropertyAccessException("unable to resolve method: " + cls.getName() + "." + name + "(" + errorBuild.toString() + ") [arglength=" + args.length + "]", property, st);
    } else {
        for (int i = 0; i < args.length; i++) {
            args[i] = convert(args[i], parameterTypes[i]);
        }
        /**
         * Invoke the target method and return the response.
         */
        try {
            return m.invoke(ctx, args);
        } catch (IllegalAccessException e) {
            try {
                addMethodCache(cls, createSignature(name, tk), (m = getWidenedTarget(m)));
                return m.invoke(ctx, args);
            } catch (Exception e2) {
                throw new PropertyAccessException("unable to invoke method: " + name, property, cursor, e2);
            }
        } catch (RuntimeException e) {
            throw e;
        } catch (Exception e) {
            throw new PropertyAccessException("unable to invoke method: " + name, property, cursor, e);
        }
    }
}

Example 25 with StringAppender

use of org.mvel2.util.StringAppender in project mvel by mikebrock.

the class MacroProcessor method parse.

public char[] parse(char[] input) {
    setExpression(input);
    StringAppender appender = new StringAppender();
    int start;
    boolean macroArmed = true;
    String token;
    for (; cursor < length; cursor++) {
        start = cursor;
        while (cursor < length && isIdentifierPart(expr[cursor])) cursor++;
        if (cursor > start) {
            if (macros.containsKey(token = new String(expr, start, cursor - start)) && macroArmed) {
                appender.append(macros.get(token).doMacro());
            } else {
                appender.append(token);
            }
        }
        if (cursor < length) {
            switch(expr[cursor]) {
                case '\\':
                    cursor++;
                    break;
                case '/':
                    start = cursor;
                    if (cursor + 1 != length) {
                        switch(expr[cursor + 1]) {
                            case '/':
                                while (cursor != length && expr[cursor] != '\n') cursor++;
                                break;
                            case '*':
                                int len = length - 1;
                                while (cursor != len && !(expr[cursor] == '*' && expr[cursor + 1] == '/')) cursor++;
                                cursor += 2;
                                break;
                        }
                    }
                    if (cursor < length)
                        cursor++;
                    appender.append(new String(expr, start, cursor - start));
                    if (cursor < length)
                        cursor--;
                    break;
                case '"':
                case '\'':
                    appender.append(new String(expr, (start = cursor), (cursor = captureStringLiteral(expr[cursor], expr, cursor, length)) - start));
                    if (cursor >= length)
                        break;
                    else if (isIdentifierPart(expr[cursor]))
                        cursor--;
                default:
                    switch(expr[cursor]) {
                        case '.':
                            macroArmed = false;
                            break;
                        case ';':
                        case '{':
                        case '(':
                            macroArmed = true;
                            break;
                    }
                    appender.append(expr[cursor]);
            }
        }
    }
    return appender.toChars();
}