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Example 1 with VariableMapper

use of jakarta.el.VariableMapper in project tomcat by apache.

the class AstIdentifier method isReadOnly.

@Override
public boolean isReadOnly(EvaluationContext ctx) throws ELException {
    VariableMapper varMapper = ctx.getVariableMapper();
    if (varMapper != null) {
        ValueExpression expr = varMapper.resolveVariable(this.image);
        if (expr != null) {
            return expr.isReadOnly(ctx.getELContext());
        }
    }
    ctx.setPropertyResolved(false);
    boolean result = ctx.getELResolver().isReadOnly(ctx, null, this.image);
    if (!ctx.isPropertyResolved()) {
        throw new PropertyNotFoundException(MessageFactory.get("error.resolver.unhandled.null", this.image));
    }
    return result;
}
Also used : PropertyNotFoundException(jakarta.el.PropertyNotFoundException) VariableMapper(jakarta.el.VariableMapper) ValueExpression(jakarta.el.ValueExpression)

Example 2 with VariableMapper

use of jakarta.el.VariableMapper in project tomcat by apache.

the class AstFunction method getValue.

@Override
public Object getValue(EvaluationContext ctx) throws ELException {
    FunctionMapper fnMapper = ctx.getFunctionMapper();
    // quickly validate again for this request
    if (fnMapper == null) {
        throw new ELException(MessageFactory.get("error.fnMapper.null"));
    }
    Method m = fnMapper.resolveFunction(this.prefix, this.localName);
    if (m == null && this.prefix.length() == 0) {
        // TODO: Do we need to think about precedence of the various ways
        // a lambda expression may be obtained from something that
        // the parser thinks is a function?
        Object obj = null;
        if (ctx.isLambdaArgument(this.localName)) {
            obj = ctx.getLambdaArgument(this.localName);
        }
        if (obj == null) {
            VariableMapper varMapper = ctx.getVariableMapper();
            if (varMapper != null) {
                obj = varMapper.resolveVariable(this.localName);
                if (obj instanceof ValueExpression) {
                    // See if this returns a LambdaExpression
                    obj = ((ValueExpression) obj).getValue(ctx);
                }
            }
        }
        if (obj == null) {
            obj = ctx.getELResolver().getValue(ctx, null, this.localName);
        }
        if (obj instanceof LambdaExpression) {
            // Build arguments
            int i = 0;
            while (obj instanceof LambdaExpression && i < jjtGetNumChildren()) {
                Node args = jjtGetChild(i);
                obj = ((LambdaExpression) obj).invoke(((AstMethodParameters) args).getParameters(ctx));
                i++;
            }
            if (i < jjtGetNumChildren()) {
                // there were too many sets of parameters
                throw new ELException(MessageFactory.get("error.lambda.tooManyMethodParameterSets"));
            }
            return obj;
        }
        // Call to a constructor or a static method
        obj = ctx.getImportHandler().resolveClass(this.localName);
        if (obj != null) {
            return ctx.getELResolver().invoke(ctx, new ELClass((Class<?>) obj), "<init>", null, ((AstMethodParameters) this.children[0]).getParameters(ctx));
        }
        obj = ctx.getImportHandler().resolveStatic(this.localName);
        if (obj != null) {
            return ctx.getELResolver().invoke(ctx, new ELClass((Class<?>) obj), this.localName, null, ((AstMethodParameters) this.children[0]).getParameters(ctx));
        }
    }
    if (m == null) {
        throw new ELException(MessageFactory.get("error.fnMapper.method", this.getOutputName()));
    }
    // single set of method parameters
    if (this.jjtGetNumChildren() != 1) {
        throw new ELException(MessageFactory.get("error.function.tooManyMethodParameterSets", getOutputName()));
    }
    Node parameters = jjtGetChild(0);
    Class<?>[] paramTypes = m.getParameterTypes();
    Object[] params = null;
    Object result = null;
    int inputParameterCount = parameters.jjtGetNumChildren();
    int methodParameterCount = paramTypes.length;
    if (inputParameterCount == 0 && methodParameterCount == 1 && m.isVarArgs()) {
        params = new Object[] { null };
    } else if (inputParameterCount > 0) {
        params = new Object[methodParameterCount];
        try {
            for (int i = 0; i < methodParameterCount; i++) {
                if (m.isVarArgs() && i == methodParameterCount - 1) {
                    if (inputParameterCount < methodParameterCount) {
                        params[i] = new Object[] { null };
                    } else if (inputParameterCount == methodParameterCount && paramTypes[i].isArray()) {
                        params[i] = parameters.jjtGetChild(i).getValue(ctx);
                    } else {
                        Object[] varargs = new Object[inputParameterCount - methodParameterCount + 1];
                        Class<?> target = paramTypes[i].getComponentType();
                        for (int j = i; j < inputParameterCount; j++) {
                            varargs[j - i] = parameters.jjtGetChild(j).getValue(ctx);
                            varargs[j - i] = ELSupport.coerceToType(ctx, varargs[j - i], target);
                        }
                        params[i] = varargs;
                    }
                } else {
                    params[i] = parameters.jjtGetChild(i).getValue(ctx);
                }
                params[i] = ELSupport.coerceToType(ctx, params[i], paramTypes[i]);
            }
        } catch (ELException ele) {
            throw new ELException(MessageFactory.get("error.function", this.getOutputName()), ele);
        }
    }
    try {
        result = m.invoke(null, params);
    } catch (IllegalAccessException iae) {
        throw new ELException(MessageFactory.get("error.function", this.getOutputName()), iae);
    } catch (InvocationTargetException ite) {
        Throwable cause = ite.getCause();
        if (cause instanceof ThreadDeath) {
            throw (ThreadDeath) cause;
        }
        if (cause instanceof VirtualMachineError) {
            throw (VirtualMachineError) cause;
        }
        throw new ELException(MessageFactory.get("error.function", this.getOutputName()), cause);
    }
    return result;
}
Also used : VariableMapper(jakarta.el.VariableMapper) Method(java.lang.reflect.Method) InvocationTargetException(java.lang.reflect.InvocationTargetException) ELClass(jakarta.el.ELClass) ValueExpression(jakarta.el.ValueExpression) ELClass(jakarta.el.ELClass) ELException(jakarta.el.ELException) LambdaExpression(jakarta.el.LambdaExpression) FunctionMapper(jakarta.el.FunctionMapper)

Example 3 with VariableMapper

use of jakarta.el.VariableMapper in project tomcat by apache.

the class AstIdentifier method getMethodExpression.

private final MethodExpression getMethodExpression(EvaluationContext ctx) throws ELException {
    Object obj = null;
    // case A: ValueExpression exists, getValue which must
    // be a MethodExpression
    VariableMapper varMapper = ctx.getVariableMapper();
    ValueExpression ve = null;
    if (varMapper != null) {
        ve = varMapper.resolveVariable(this.image);
        if (ve != null) {
            obj = ve.getValue(ctx);
        }
    }
    // a MethodExpression to be able to invoke
    if (ve == null) {
        ctx.setPropertyResolved(false);
        obj = ctx.getELResolver().getValue(ctx, null, this.image);
    }
    // finally provide helpful hints
    if (obj instanceof MethodExpression) {
        return (MethodExpression) obj;
    } else if (obj == null) {
        throw new MethodNotFoundException(MessageFactory.get("error.identifier.noMethod", this.image));
    } else {
        throw new ELException(MessageFactory.get("error.identifier.notMethodExpression", this.image, obj.getClass().getName()));
    }
}
Also used : VariableMapper(jakarta.el.VariableMapper) ValueExpression(jakarta.el.ValueExpression) ELException(jakarta.el.ELException) MethodExpression(jakarta.el.MethodExpression) MethodNotFoundException(jakarta.el.MethodNotFoundException)

Example 4 with VariableMapper

use of jakarta.el.VariableMapper in project tomcat by apache.

the class AstIdentifier method getType.

@Override
public Class<?> getType(EvaluationContext ctx) throws ELException {
    VariableMapper varMapper = ctx.getVariableMapper();
    if (varMapper != null) {
        ValueExpression expr = varMapper.resolveVariable(this.image);
        if (expr != null) {
            return expr.getType(ctx.getELContext());
        }
    }
    ctx.setPropertyResolved(false);
    Class<?> result = ctx.getELResolver().getType(ctx, null, this.image);
    if (!ctx.isPropertyResolved()) {
        throw new PropertyNotFoundException(MessageFactory.get("error.resolver.unhandled.null", this.image));
    }
    return result;
}
Also used : PropertyNotFoundException(jakarta.el.PropertyNotFoundException) VariableMapper(jakarta.el.VariableMapper) ValueExpression(jakarta.el.ValueExpression)

Example 5 with VariableMapper

use of jakarta.el.VariableMapper in project tomcat by apache.

the class AstIdentifier method setValue.

@Override
public void setValue(EvaluationContext ctx, Object value) throws ELException {
    VariableMapper varMapper = ctx.getVariableMapper();
    if (varMapper != null) {
        ValueExpression expr = varMapper.resolveVariable(this.image);
        if (expr != null) {
            expr.setValue(ctx.getELContext(), value);
            return;
        }
    }
    ctx.setPropertyResolved(false);
    ctx.getELResolver().setValue(ctx, null, this.image, value);
    if (!ctx.isPropertyResolved()) {
        throw new PropertyNotFoundException(MessageFactory.get("error.resolver.unhandled.null", this.image));
    }
}
Also used : PropertyNotFoundException(jakarta.el.PropertyNotFoundException) VariableMapper(jakarta.el.VariableMapper) ValueExpression(jakarta.el.ValueExpression)

Aggregations

ValueExpression (jakarta.el.ValueExpression)8 VariableMapper (jakarta.el.VariableMapper)8 PropertyNotFoundException (jakarta.el.PropertyNotFoundException)4 ELException (jakarta.el.ELException)3 ELClass (jakarta.el.ELClass)2 ELContext (jakarta.el.ELContext)1 ExpressionFactory (jakarta.el.ExpressionFactory)1 FunctionMapper (jakarta.el.FunctionMapper)1 LambdaExpression (jakarta.el.LambdaExpression)1 MethodExpression (jakarta.el.MethodExpression)1 MethodNotFoundException (jakarta.el.MethodNotFoundException)1 TesterELContext (jakarta.el.TesterELContext)1 InvocationTargetException (java.lang.reflect.InvocationTargetException)1 Method (java.lang.reflect.Method)1 Test (org.junit.Test)1