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

Example 6 with VariableMapper

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

the class AstIdentifier method getValueReference.

@Override
public ValueReference getValueReference(EvaluationContext ctx) {
    VariableMapper varMapper = ctx.getVariableMapper();
    if (varMapper == null) {
        return null;
    }
    ValueExpression expr = varMapper.resolveVariable(this.image);
    if (expr == null) {
        return null;
    }
    return expr.getValueReference(ctx);
}

Example 7 with VariableMapper

use of jakarta.el.VariableMapper 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 8 with VariableMapper

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

the class TesterVariableMapperImpl method testSetVariable01.

@Test
public void testSetVariable01() {
    ExpressionFactory factory = ELManager.getExpressionFactory();
    ELContext context = new TesterELContext();
    ValueExpression ve1 = factory.createValueExpression(context, "${1}", int.class);
    ValueExpression ve2 = factory.createValueExpression(context, "${2}", int.class);
    ValueExpression ve3 = factory.createValueExpression(context, "${3}", int.class);
    VariableMapper mapper = new VariableMapperImpl();
    mapper.setVariable("var1", ve1);
    mapper.setVariable("var2", ve2);
    mapper.setVariable("var3", ve3);
    mapper.setVariable("var2", null);
    Assert.assertEquals(ve1, mapper.resolveVariable("var1"));
    Assert.assertNull(mapper.resolveVariable("var2"));
    Assert.assertEquals(ve3, mapper.resolveVariable("var3"));
}