use of com.iabcinc.jmep.Environment 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());
}
use of com.iabcinc.jmep.Environment 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();
}
use of com.iabcinc.jmep.Environment 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;
}
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