Example usage for org.apache.commons.jxpath Variables isDeclaredVariable

Introduction

In this page you can find the example usage for org.apache.commons.jxpath Variables isDeclaredVariable.

Prototype

boolean isDeclaredVariable(String varName);

Source Link

Document

Returns true if the specified variable is declared.

Usage

From source file:org.openvpms.archetype.function.expression.ExpressionFunctions.java

/**
 * Evaluates a variable, if it exists.//w w  w  .  j  a  v a  2s. c  o m
 *
 * @param context the expression context
 * @param name    the variable name
 * @return the value of the variable, or {@code elseValue} if it doesn't exist
 */
public Object var(ExpressionContext context, String name, Object elseValue) {
    Variables variables = context.getJXPathContext().getVariables();
    if (variables.isDeclaredVariable(name)) {
        return variables.getVariable(name);
    }
    return elseValue;
}

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