Examples with Constant com.iabcinc.jmep.hooks.Constant used on opensource projects

Example 1 with Constant

use of com.iabcinc.jmep.hooks.Constant in project hale by halestudio.

the class MathExpressionParameterPage method sourcePropertiesChanged.

/**
 * @see TextSourceListParameterPage#sourcePropertiesChanged(Iterable)
 */
@Override
protected void sourcePropertiesChanged(Iterable<EntityDefinition> variables) {
    super.sourcePropertiesChanged(variables);
    // update environment
    environment = new Environment();
    for (EntityDefinition variable : variables) {
        environment.addVariable(getVariableName(variable), new Constant(new Double(1)));
    }
    // re set text to get modify event
    textField.setText(textField.getText());
}

Example 2 with Constant

use of com.iabcinc.jmep.hooks.Constant in project hale by halestudio.

the class MathematicalExpression method evaluateExpression.

/**
 * Evaluate a mathematical expression.
 *
 * @param expression the mathematical expression. It may contain references
 *            to variables
 * @param vars the list of available property values that may be bound to
 *            variables
 * @return the evaluated expression, which can be Double, Integer or String
 * @throws XExpression if the expression could not be evaluated
 */
public static Object evaluateExpression(String expression, List<PropertyValue> vars) throws XExpression {
    Environment env = new Environment();
    for (PropertyValue var : vars) {
        // add the variable to the environment
        // determine the variable value
        Object value = var.getValue();
        Number number;
        if (value instanceof Number) {
            number = (Number) value;
        } else {
            // try conversion to Double as default
            number = var.getValueAs(Double.class);
        }
        // Floats
        if (!(number instanceof Integer) && !(number instanceof Double)) {
            number = number.doubleValue();
        }
        // determine the variable name
        String name = var.getProperty().getDefinition().getName().getLocalPart();
        Constant varValue = new Constant(number);
        // name is overridden
        if (env.getVariable(name) == null || var.getProperty().getPropertyPath().size() == 1) {
            env.addVariable(name, varValue);
        }
        // add with long name if applicable
        if (var.getProperty().getPropertyPath().size() > 1) {
            List<String> names = new ArrayList<String>();
            for (ChildContext context : var.getProperty().getPropertyPath()) {
                names.add(context.getChild().getName().getLocalPart());
            }
            String longName = Joiner.on('.').join(names);
            env.addVariable(longName, varValue);
        }
    }
    Expression ex = new Expression(expression, env);
    return ex.evaluate();
}

Example 3 with Constant

use of com.iabcinc.jmep.hooks.Constant in project hale by halestudio.

the class MathScript method createEnvironment.

private Environment createEnvironment(Iterable<PropertyValue> variables) {
    Environment env = new Environment();
    for (PropertyValue var : variables) {
        // add the variable to the environment
        // determine the variable value
        Object value = var.getValue();
        Number number;
        if (value instanceof Number) {
            number = (Number) value;
        } else {
            // try conversion to Double as default
            try {
                number = var.getValueAs(Double.class);
            } catch (ConversionException ce) {
                // expression for better exception messages
                continue;
            }
        }
        // Floats
        if (!(number instanceof Integer) && !(number instanceof Double)) {
            number = number.doubleValue();
        }
        Constant varValue = new Constant(number);
        // add with short name, if it does not override something
        String name = var.getProperty().getDefinition().getName().getLocalPart();
        if (!env.getVariables().containsKey(name))
            env.addVariable(name, varValue);
        // add with full name
        env.addVariable(getVariableName(var.getProperty()), varValue);
    }
    return env;
}