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();
}
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);
}
}
}
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();
}
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());
}
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;
}
}
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