Examples with ELResolver jakarta.el.ELResolver used on opensource projects

Example 1 with ELResolver

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

the class TestJasperELResolver method doTestConstructor.

private void doTestConstructor(int count) throws Exception {
    List<ELResolver> list = new ArrayList<>();
    for (int i = 0; i < count; i++) {
        list.add(new ImplicitObjectELResolver());
    }
    int adjustedForGraalCount = JspRuntimeLibrary.GRAAL ? count + 1 : count;
    JasperELResolver resolver = new JasperELResolver(list, new StreamELResolverImpl());
    Assert.assertEquals(Integer.valueOf(count), getField("appResolversSize", resolver));
    Assert.assertEquals(STANDARD_RESOLVERS_COUNT + adjustedForGraalCount, ((ELResolver[]) getField("resolvers", resolver)).length);
    Assert.assertEquals(Integer.valueOf(STANDARD_RESOLVERS_COUNT + adjustedForGraalCount), Integer.valueOf(((AtomicInteger) getField("resolversSize", resolver)).get()));
}

Example 2 with ELResolver

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

the class AstValue method getValue.

@Override
public Object getValue(EvaluationContext ctx) throws ELException {
    Object base = this.children[0].getValue(ctx);
    int propCount = this.jjtGetNumChildren();
    int i = 1;
    Object suffix = null;
    ELResolver resolver = ctx.getELResolver();
    while (base != null && i < propCount) {
        suffix = this.children[i].getValue(ctx);
        if (i + 1 < propCount && (this.children[i + 1] instanceof AstMethodParameters)) {
            AstMethodParameters mps = (AstMethodParameters) this.children[i + 1];
            if (base instanceof Optional && "orElseGet".equals(suffix) && mps.jjtGetNumChildren() == 1) {
                Node paramFoOptional = mps.jjtGetChild(0);
                if (!(paramFoOptional instanceof AstLambdaExpression || paramFoOptional instanceof LambdaExpression)) {
                    throw new ELException(MessageFactory.get("stream.optional.paramNotLambda", suffix));
                }
            }
            // This is a method
            Object[] paramValues = mps.getParameters(ctx);
            base = resolver.invoke(ctx, base, suffix, getTypesFromValues(paramValues), paramValues);
            i += 2;
        } else {
            // This is a property
            if (suffix == null) {
                return null;
            }
            ctx.setPropertyResolved(false);
            base = resolver.getValue(ctx, base, suffix);
            i++;
        }
    }
    if (!ctx.isPropertyResolved()) {
        throw new PropertyNotFoundException(MessageFactory.get("error.resolver.unhandled", base, suffix));
    }
    return base;
}

Example 3 with ELResolver

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

the class AstValue method setValue.

@Override
public void setValue(EvaluationContext ctx, Object value) throws ELException {
    Target t = getTarget(ctx);
    ctx.setPropertyResolved(false);
    ELResolver resolver = ctx.getELResolver();
    // coerce to the expected type
    Class<?> targetClass = resolver.getType(ctx, t.base, t.property);
    resolver.setValue(ctx, t.base, t.property, ELSupport.coerceToType(ctx, value, targetClass));
    if (!ctx.isPropertyResolved()) {
        throw new PropertyNotFoundException(MessageFactory.get("error.resolver.unhandled", t.base, t.property));
    }
}

Example 4 with ELResolver

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

the class AstValue method getTarget.

private final Target getTarget(EvaluationContext ctx) throws ELException {
    // evaluate expr-a to value-a
    Object base = this.children[0].getValue(ctx);
    // if our base is null (we know there are more properties to evaluate)
    if (base == null) {
        throw new PropertyNotFoundException(MessageFactory.get("error.unreachable.base", this.children[0].getImage()));
    }
    // set up our start/end
    Object property = null;
    int propCount = this.jjtGetNumChildren();
    int i = 1;
    // Evaluate any properties or methods before our target
    ELResolver resolver = ctx.getELResolver();
    while (i < propCount) {
        if (i + 2 < propCount && this.children[i + 1] instanceof AstMethodParameters) {
            // Method call not at end of expression
            base = resolver.invoke(ctx, base, this.children[i].getValue(ctx), null, ((AstMethodParameters) this.children[i + 1]).getParameters(ctx));
            i += 2;
        } else if (i + 2 == propCount && this.children[i + 1] instanceof AstMethodParameters) {
            // Method call at end of expression
            ctx.setPropertyResolved(false);
            property = this.children[i].getValue(ctx);
            i += 2;
            if (property == null) {
                throw new PropertyNotFoundException(MessageFactory.get("error.unreachable.property", property));
            }
        } else if (i + 1 < propCount) {
            // Object with property not at end of expression
            property = this.children[i].getValue(ctx);
            ctx.setPropertyResolved(false);
            base = resolver.getValue(ctx, base, property);
            i++;
        } else {
            // Object with property at end of expression
            ctx.setPropertyResolved(false);
            property = this.children[i].getValue(ctx);
            i++;
            if (property == null) {
                throw new PropertyNotFoundException(MessageFactory.get("error.unreachable.property", property));
            }
        }
        if (base == null) {
            throw new PropertyNotFoundException(MessageFactory.get("error.unreachable.property", property));
        }
    }
    Target t = new Target();
    t.base = base;
    t.property = property;
    return t;
}

Example 5 with ELResolver

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

the class TestScopedAttributeELResolverPerformance method testGetValuePerformance.

/*
     * With the caching of NotFound responses this test takes ~20ms. Without the
     * caching it takes ~6s.
     */
@Test
public void testGetValuePerformance() throws Exception {
    ELContext context = new StandardELContext(ELManager.getExpressionFactory());
    context.putContext(JspContext.class, new TesterPageContext());
    ELResolver resolver = new ScopedAttributeELResolver();
    for (int i = 0; i < 100000; i++) {
        resolver.getValue(context, null, "unknown");
    }
}