Examples with ValueExpression javax.el.ValueExpression used on opensource projects

Example 51 with ValueExpression

use of javax.el.ValueExpression 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));
    }
}

Example 52 with ValueExpression

use of javax.el.ValueExpression 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;
}

Example 53 with ValueExpression

use of javax.el.ValueExpression in project tomcat by apache.

the class AstIdentifier method getValue.

@Override
public Object getValue(EvaluationContext ctx) throws ELException {
    // Lambda parameters
    if (ctx.isLambdaArgument(this.image)) {
        return ctx.getLambdaArgument(this.image);
    }
    // Variable mapper
    VariableMapper varMapper = ctx.getVariableMapper();
    if (varMapper != null) {
        ValueExpression expr = varMapper.resolveVariable(this.image);
        if (expr != null) {
            return expr.getValue(ctx.getELContext());
        }
    }
    // EL Resolvers
    ctx.setPropertyResolved(false);
    Object result;
    /* Putting the Boolean into the ELContext is part of a performance
         * optimisation for ScopedAttributeELResolver. When looking up "foo",
         * the resolver can't differentiate between ${ foo } and ${ foo.bar }.
         * This is important because the expensive class lookup only needs to
         * be performed in the later case. This flag tells the resolver if the
         * lookup can be skipped.
         */
    if (parent instanceof AstValue) {
        ctx.putContext(this.getClass(), Boolean.FALSE);
    } else {
        ctx.putContext(this.getClass(), Boolean.TRUE);
    }
    try {
        result = ctx.getELResolver().getValue(ctx, null, this.image);
    } finally {
        // Always reset the flag to false so the optimisation is not applied
        // inappropriately
        ctx.putContext(this.getClass(), Boolean.FALSE);
    }
    if (ctx.isPropertyResolved()) {
        return result;
    }
    // Import
    result = ctx.getImportHandler().resolveClass(this.image);
    if (result != null) {
        return new ELClass((Class<?>) result);
    }
    result = ctx.getImportHandler().resolveStatic(this.image);
    if (result != null) {
        try {
            return ((Class<?>) result).getField(this.image).get(null);
        } catch (IllegalArgumentException | IllegalAccessException | NoSuchFieldException | SecurityException e) {
            throw new ELException(e);
        }
    }
    throw new PropertyNotFoundException(MessageFactory.get("error.resolver.unhandled.null", this.image));
}

Example 54 with ValueExpression

use of javax.el.ValueExpression in project jersey by jersey.

the class ELLinkBuilder method buildURI.

/**
     * TODO javadoc.
     */
static URI buildURI(InjectLinkDescriptor link, Object entity, Object resource, Object instance, UriInfo uriInfo, ResourceMappingContext rmc) {
    String template = link.getLinkTemplate(rmc);
    // first process any embedded EL expressions
    LinkELContext context = new LinkELContext(entity, resource, instance);
    ValueExpression expr = expressionFactory.createValueExpression(context, template, String.class);
    template = expr.getValue(context).toString();
    // now process any embedded URI template parameters
    UriBuilder ub = applyLinkStyle(template, link.getLinkStyle(), uriInfo);
    UriTemplateParser parser = new UriTemplateParser(template);
    List<String> parameterNames = parser.getNames();
    Map<String, Object> valueMap = getParameterValues(parameterNames, link, context, uriInfo);
    return ub.buildFromMap(valueMap);
}

Example 55 with ValueExpression

use of javax.el.ValueExpression in project jersey by jersey.

the class ELLinkBuilder method evaluateCondition.

/**
     * TODO javadoc.
     */
static boolean evaluateCondition(String condition, Object entity, Object resource, Object instance) {
    if (condition == null || condition.isEmpty()) {
        return true;
    }
    LinkELContext context = new LinkELContext(entity, resource, instance);
    ValueExpression expr = expressionFactory.createValueExpression(context, condition, boolean.class);
    Object result = expr.getValue(context).toString();
    return "true".equals(result);
}