Start new SLC project structure

[gpl/argeo-slc.git] / runtime / org.argeo.slc.specs / src / main / java / org / argeo / slc / execution / ExecutionSpecAttribute.java

diff --git a/runtime/org.argeo.slc.specs/src/main/java/org/argeo/slc/execution/ExecutionSpecAttribute.java b/runtime/org.argeo.slc.specs/src/main/java/org/argeo/slc/execution/ExecutionSpecAttribute.java
index 235171b1de1bbaa14258233fb83fcf5e75c52c57..a430e5bb09b4f31cbea5a6c84ea410467c61d012 100644 (file)
--- a/runtime/org.argeo.slc.specs/src/main/java/org/argeo/slc/execution/ExecutionSpecAttribute.java
+++ b/runtime/org.argeo.slc.specs/src/main/java/org/argeo/slc/execution/ExecutionSpecAttribute.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2010 Mathieu Baudier <mbaudier@argeo.org>
+ * Copyright (C) 2007-2012 Argeo GmbH
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -13,16 +13,56 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-
 package org.argeo.slc.execution;
 
+/**
+ * Possible attribute of an execution flow.
+ * 
+ * There are mainly two implementations :<br>
+ * + Primitive attributes (no predefined choice, the end user must compute a
+ * String, a Float, an Integer...)<br>
+ * + RefSpecAttribute which enable two things<br>
+ * ++ a reference to another object of the application context<br>
+ * ++ the display of some choices among which the end user can choose.<br>
+ * 
+ * @see org.argeo.slc.core.execution.PrimitiveSpecAttribute
+ * @see org.argeo.slc.core.execution.RefSpecAttribute
+ * @see org.argeo.slc.core.execution.PrimitiveUtils : this class offers some
+ *      helper, among others to cast the various type of primitive attribute.
+ */
 public interface ExecutionSpecAttribute {
+       /**
+        * Whether this attribute has to be set at instantiation of the flow and
+        * cannot be modified afterwards. If the attribute is not immutable (that
+        * is, this method returns false), it can be set at execution time.
+        */
+       public Boolean getIsImmutable();
+
+       /**
+        * Whether this attribute must be explicitly set and cannot be modified.
+        * This attribute is then basically a constant within a given application
+        * context. {@link #getValue()} cannot return null if the attribute is a
+        * constant.
+        */
+       public Boolean getIsConstant();
+
+       /** Whether this attribute will be hidden to end users. */
+       public Boolean getIsHidden();
+
+       /**
+        * The default value for this attribute. Can be null, except if
+        * {@link #getIsFrozen()} is <code>true</code>, in which case it represents
+        * the constant value of this attribute.
+        */
        public Object getValue();
 
+       /** Description of this attribute, can be null */
+       public String getDescription();
+
+       /** @deprecated use {@link #getIsImmutable()} instead */
        public Boolean getIsParameter();
 
+       /** @deprecated use {@link #getIsConstant()} instead */
        public Boolean getIsFrozen();
 
-       public Boolean getIsHidden();
-
 }