first commit

hrmsEjb/org/nfunk/jep/Variable.java

@@ -0,0 +1,69 @@
+package org.nfunk.jep;
+
+import java.util.Observable;
+
+public class Variable extends Observable {
+  protected String name;
+  
+  private Object value;
+  
+  private boolean isConstant = false;
+  
+  private boolean validValue = false;
+  
+  protected Variable(String paramString) {
+    this.name = paramString;
+    this.value = null;
+    this.validValue = false;
+  }
+  
+  protected Variable(String paramString, Object paramObject) {
+    this.name = paramString;
+    this.value = paramObject;
+    this.validValue = (paramObject != null);
+  }
+  
+  public String getName() {
+    return this.name;
+  }
+  
+  public boolean isConstant() {
+    return this.isConstant;
+  }
+  
+  public void setIsConstant(boolean paramBoolean) {
+    this.isConstant = paramBoolean;
+  }
+  
+  public Object getValue() {
+    return this.value;
+  }
+  
+  public boolean hasValidValue() {
+    return this.validValue;
+  }
+  
+  public void setValidValue(boolean paramBoolean) {
+    this.validValue = paramBoolean;
+  }
+  
+  public boolean setValue(Object paramObject) {
+    if (!setValueRaw(paramObject))
+      return false; 
+    setChanged();
+    notifyObservers();
+    return true;
+  }
+  
+  protected boolean setValueRaw(Object paramObject) {
+    if (this.isConstant)
+      return false; 
+    this.validValue = true;
+    this.value = paramObject;
+    return true;
+  }
+  
+  public String toString() {
+    return (!this.validValue || this.value == null) ? (this.name + ": null") : (this.isConstant ? (this.name + ": " + this.value.toString() + " (Constant)") : (this.name + ": " + this.value.toString()));
+  }
+}