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

Example 1 with StringAppender

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

the class PropertyAccessor method getMethod.

/**
 * Find an appropriate method, execute it, and return it's response.
 *
 * @param ctx  -
 * @param name -
 * @return -
 */
@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 FunctionInstance) {
            ((FunctionInstance) ptr).getFunction().checkArgumentCount(args.length);
            return ((FunctionInstance) 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 = currType != null ? currType : ((ctx instanceof Class ? (Class) ctx : ctx.getClass()));
    currType = null;
    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.getDeclaredMethods(), false)) != null) {
                addMethodCache(cls, createSignature(name, tk), m);
                parameterTypes = m.getParameterTypes();
            }
        }
    }
    // If we didn't find anything and the declared class is different from the actual one try also with the actual one
    if (m == null && cls != ctx.getClass() && !(ctx instanceof Class)) {
        cls = ctx.getClass();
        if ((m = getBestCandidate(args, name, cls, cls.getDeclaredMethods(), false)) != null) {
            addMethodCache(cls, createSignature(name, tk), m);
            parameterTypes = m.getParameterTypes();
        }
    }
    if (ctx instanceof PrototypalFunctionInstance) {
        final VariableResolverFactory funcCtx = ((PrototypalFunctionInstance) ctx).getResolverFactory();
        Object prop = funcCtx.getVariableResolver(name).getValue();
        if (prop instanceof PrototypalFunctionInstance) {
            return ((PrototypalFunctionInstance) prop).call(ctx, thisReference, new InvokationContextFactory(variableFactory, funcCtx), args);
        }
    }
    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);
        }
        throw new PropertyAccessException("unable to resolve method: " + cls.getName() + "." + name + "(" + errorBuild.toString() + ") [arglength=" + args.length + "]", property, st, pCtx);
    } else {
        for (int i = 0; i < args.length; i++) {
            args[i] = convert(args[i], paramTypeVarArgsSafe(parameterTypes, i, m.isVarArgs()));
        }
        /**
         * Invoke the target method and return the response.
         */
        currType = toNonPrimitiveType(m.getReturnType());
        try {
            return m.invoke(ctx, normalizeArgsForVarArgs(parameterTypes, args, m.isVarArgs()));
        } 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, pCtx);
            }
        } catch (RuntimeException e) {
            throw e;
        } catch (Exception e) {
            throw new PropertyAccessException("unable to invoke method: " + name, property, cursor, e, pCtx);
        }
    }
}

Example 2 with StringAppender

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

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 {
            Function f = pCtx.getFunction(name);
            if (f != null && f.getEgressType() != null) {
                resolvedExternally = false;
                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++) {
                Type typeArg = pCtx.getLastTypeParameters()[i];
                typeArgs.put(typeVariables[i].getName(), typeArg instanceof Class ? type2Class(pCtx.getLastTypeParameters()[i]) : Object.class);
            }
        }
        /**
         * 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 type2Class(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()) && pCtx.isStrictTypeEnforcement()) {
        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 getReturnType(ctx, m);
}

Example 3 with StringAppender

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

the class MVELIncludeTest method testEvalFile1.

/**
 * evalFile with sub template in utf-8 encoding
 *
 * @throws IOException
 */
public void testEvalFile1() throws IOException {
    final CompiledTemplate template = TemplateCompiler.compileTemplate(file);
    final String tr = (String) new TemplateRuntime(template.getTemplate(), null, template.getRoot(), "./samples/scripts/").execute(new StringAppender(), new HashMap<String, String>(), new ImmutableDefaultFactory());
    assertEquals("Hello mister Gaël Périé", tr);
}

Example 4 with StringAppender

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

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 5 with StringAppender

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

the class Fuzzer method main.

public static void main(String[] args) throws IOException {
    DecimalFormat df = new DecimalFormat("###,###.##");
    StringAppender append = new StringAppender();
    int len;
    long start = currentTimeMillis();
    long time;
    double rate;
    int seed;
    boolean flip = false;
    Random rand = new Random(System.currentTimeMillis());
    Random rand1 = new Random(System.currentTimeMillis() + 1);
    Random rand2 = new Random(rand1.nextInt());
    Random rand3 = new Random(rand.nextInt(SALTS.length - 1));
    Random rand4 = new Random(rand3.nextInt());
    for (int run = 0; run < MAX; run++) {
        len = (int) (random() * 500) + 10;
        append.reset();
        for (int i = 0; i < len; i++) {
            append.append(CHAR_TABLE[((SALTS[((rand.nextInt(1000)) + 1) % SALTS.length]) * ((flip = !flip) ? rand1.nextInt(1000) : rand2.nextInt(1000)) + 1) % CHAR_TABLE.length]);
            SALTS[rand3.nextInt(SALTS.length - 1)] ^= rand4.nextInt(1000) + 1;
        }
        try {
            MVEL.eval(append.toString());
        } catch (UnresolveablePropertyException e) {
        // ignore
        } catch (CompileException e) {
        // ignore
        } catch (ArithmeticException e) {
        // ignore
        } catch (ScriptRuntimeException e) {
        // ignore
        } catch (Exception e) {
            System.out.println("untrapped error!\n---\n" + append.toString() + "\n---\n");
            System.out.flush();
            e.printStackTrace();
            System.err.flush();
        }
        if (run % 25000 == 0 && run != 0) {
            long l = time = (currentTimeMillis() - start) / 1000;
            if (l == 0) {
                l = 1;
            }
            rate = run / l;
            System.out.println("Run: " + df.format(run) + " times; " + df.format(time) + "secs; " + df.format(rate) + " avg. per second.");
        }
    }
}