Escribir y leer fórmulas con Aspose.Tasks para Java

Aspose.Tasks for Java API admite lectura/escritura de fórmulas a los archivos del proyecto MPP. La propiedad de fórmula de ExtendedAttributeDefinition proporciona la interfaz para leer el valor de la fórmula. Este artículo describe cómo leer fórmulas de los atributos locales y de Enterprise Extended del archivo MPP.

Escribir fórmulas en atributos extendidos a formatos de archivo MPP

// The path to the documents directory.
String dataDir = Utils.getDataDir(WriteReadFormula.class);

Project project = new Project(dataDir + "New project 2010.mpp");
project.set(Prj.NEW_TASKS_ARE_MANUAL, new NullableBool(false));

// create new custom field (Task Text1) with formula which will double task cost
ExtendedAttributeDefinition attr = ExtendedAttributeDefinition.createTaskDefinition(CustomFieldType.Text,
        ExtendedAttributeTask.Text1, "Custom");
attr.setAlias("Double Costs");
attr.setFormula("[Cost]*2");

project.getExtendedAttributes().add(attr);

// add a task to see the result in MSP
Task task = project.getRootTask().getChildren().add("Task");
// set task cost
task.set(Tsk.COST, BigDecimal.valueOf(100));
// see the result in the attached screenshot (result.jpg)
project.save(dataDir + "saved.mpp", SaveFileFormat.MPP);

Reading Formulas in Local and Enterprise Extended Attributes from MPP file

// The path to the documents directory.
String dataDir = Utils.getDataDir(WriteReadFormula.class);

Project proj = new Project(dataDir + "FormulaField.mpp"); // attached test mpp
ExtendedAttributeDefinition attr = proj.getExtendedAttributes().get(0);

System.out.println("Attribute Formula: " + attr.getFormula());

Read-Only Access to Custom Field Values when Using Formulas

// The path to the documents directory.
String dataDir = Utils.getDataDir(WriteReadFormula.class);

Project project = new Project();

ExtendedAttributeDefinition attribute = ExtendedAttributeDefinition.createTaskDefinition(CustomFieldType.Cost,
        ExtendedAttributeTask.Cost1, "");
attribute.setFormula("[Cost]-[Actual Cost]");

project.getExtendedAttributes().add(attribute);

// Add task
Task task = project.getRootTask().getChildren().add("Task");

// Create extended attribute
ExtendedAttribute extendedAttribute = attribute.createExtendedAttribute();
task.getExtendedAttributes().add(extendedAttribute);

// Display if extended attributes are read only or not
System.out.println(
        extendedAttribute.getValueReadOnly() == true ? "Value is Read only" : "Value is not read only");
extendedAttribute.setTextValue("-36755");
System.out.println(
        extendedAttribute.getTextValue() == " " ? "Formula values are read-only" : "Values are not read-only");