Example usage for javax.el VariableMapper VariableMapper

Introduction

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

Prototype

VariableMapper

Source Link

Usage

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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