use of org.mvel2.optimizers.impl.refl.nodes.DynamicFunctionAccessor in project mvel by mvel.
the class ReflectiveAccessorOptimizer method getMethod.
@SuppressWarnings({ "unchecked" })
private Object getMethod(Object ctx, String name, Object[] args, Class[] argTypes, ExecutableStatement[] es) throws Exception {
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 func = (FunctionInstance) ptr;
if (!name.equals(func.getFunction().getName())) {
getBeanProperty(ctx, name);
addAccessorNode(new DynamicFunctionAccessor(es));
} else {
addAccessorNode(new FunctionAccessor(func, es));
}
return func.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 && currType == null) {
throw new PropertyAccessException("null pointer or function not found: " + name, this.expr, this.start, pCtx);
}
boolean classTarget = false;
Class<?> cls = currType != null ? currType : ((classTarget = ctx instanceof Class) ? (Class<?>) ctx : ctx.getClass());
currType = null;
Method m;
Class[] parameterTypes = null;
/**
* Try to find an instance method from the class target.
*/
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 we didn't find anything and the declared class is different from the actual one try also with the actual one
if (m == null && ctx != null && cls != ctx.getClass() && !(ctx instanceof Class)) {
cls = ctx.getClass();
if ((m = getBestCandidate(argTypes, name, cls, cls.getMethods(), false, classTarget)) != 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);
}
// if it is not already using this as context try to access the method this
if (ctx != this.thisRef && this.thisRef != null) {
addAccessorNode(new ThisValueAccessor());
return getMethod(this.thisRef, name, args, argTypes, es);
}
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, pCtx);
}
if (es != null) {
ExecutableStatement cExpr;
for (int i = 0; i < es.length; i++) {
cExpr = es[i];
if (cExpr.getKnownIngressType() == null) {
cExpr.setKnownIngressType(paramTypeVarArgsSafe(parameterTypes, i, m.isVarArgs()));
cExpr.computeTypeConversionRule();
}
if (!cExpr.isConvertableIngressEgress()) {
args[i] = convert(args[i], paramTypeVarArgsSafe(parameterTypes, i, m.isVarArgs()));
}
}
} else {
/**
* Coerce any types if required.
*/
for (int i = 0; i < args.length; i++) args[i] = convert(args[i], paramTypeVarArgsSafe(parameterTypes, i, m.isVarArgs()));
}
Method method = getWidenedTarget(cls, m);
Object o = ctx != null ? method.invoke(ctx, normalizeArgsForVarArgs(parameterTypes, args, m.isVarArgs())) : null;
if (hasNullMethodHandler()) {
addAccessorNode(new MethodAccessorNH(method, (ExecutableStatement[]) es, getNullMethodHandler()));
if (o == null)
o = getNullMethodHandler().getProperty(m.getName(), ctx, variableFactory);
} else {
addAccessorNode(new MethodAccessor(method, (ExecutableStatement[]) es));
}
/**
* return the response.
*/
currType = toNonPrimitiveType(method.getReturnType());
return o;
}
use of org.mvel2.optimizers.impl.refl.nodes.DynamicFunctionAccessor 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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