Example usage for javax.el ELContext ELContext

Introduction

In this page you can find the example usage for javax.el ELContext ELContext.

Prototype

public ELContext() 

Source Link

Usage

From source file:biz.netcentric.cq.tools.actool.configreader.YamlMacroElEvaluator.java

public YamlMacroElEvaluator() {

    try {//from w w  w .  ja va2s.  co m
        Class<?> expressionFactoryClass = getClass().getClassLoader()
                .loadClass("org.apache.el.ExpressionFactoryImpl");
        expressionFactory = (ExpressionFactory) expressionFactoryClass.newInstance();
    } catch (ClassNotFoundException | InstantiationException | IllegalAccessException e) {
        throw new IllegalStateException("Could not init EL: " + e);
    }

    final VariableMapper variableMapper = new ElVariableMapper();
    final ElFunctionMapper functionMapper = new ElFunctionMapper();
    final CompositeELResolver compositeELResolver = new CompositeELResolver();

    compositeELResolver.add(new BaseELResolver());
    compositeELResolver.add(new ArrayELResolver());
    compositeELResolver.add(new ListELResolver());
    compositeELResolver.add(new BeanELResolver());
    compositeELResolver.add(new MapELResolver());
    context = new ELContext() {
        @Override
        public ELResolver getELResolver() {
            return compositeELResolver;
        }

        @Override
        public FunctionMapper getFunctionMapper() {
            return functionMapper;
        }

        @Override
        public VariableMapper getVariableMapper() {
            return variableMapper;
        }
    };

}

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From source file:org.richfaces.taglib.ColumnsTag.java

/**
 * Create custom context with VariableMapper override.
 * /*from   w  w w .j av  a  2s.  c om*/
 * @param context
 * @return
 */
private ELContext getContext(final ELContext cont) {
    return new ELContext() {

        @Override
        public Object getContext(Class key) {
            return cont.getContext(key);
        }

        @Override
        public ELResolver getELResolver() {
            return cont.getELResolver();
        }

        @Override
        public FunctionMapper getFunctionMapper() {
            return cont.getFunctionMapper();
        }

        @Override
        public VariableMapper getVariableMapper() {
            return new VariableMapper() {

                @Override
                public ValueExpression resolveVariable(String variable) {
                    if (variable.equals(itemId)) {
                        return new IndexedValueExpression(__value, index);
                    } else if (variable.equals(indexId)) {
                        return new IteratedIndexExpression(index);
                    }
                    return cont.getVariableMapper().resolveVariable(variable);
                }

                @Override
                public ValueExpression setVariable(String variable, ValueExpression expression) {
                    return cont.getVariableMapper().setVariable(variable, expression);
                }

            };
        }

    };
}

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