X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=core%2Fsrc%2Fde%2Fcongrace%2Fexp4j%2FVariableSet.java;fp=core%2Fsrc%2Fde%2Fcongrace%2Fexp4j%2FVariableSet.java;h=f567006fe228ab5937c0505092340ac866d147bc;hb=9349577cdfdff682b2aabd6daa24fdc3a7449b58;hp=0000000000000000000000000000000000000000;hpb=30ba0a882f0c061176ba14dbf86d3d6fad096c02;p=debian%2Fopenrocket

diff --git a/core/src/de/congrace/exp4j/VariableSet.java b/core/src/de/congrace/exp4j/VariableSet.java
new file mode 100644
index 00000000..f567006f
--- /dev/null
+++ b/core/src/de/congrace/exp4j/VariableSet.java
@@ -0,0 +1,42 @@
+package de.congrace.exp4j;
+
+import java.util.HashSet;
+
+public class VariableSet extends HashSet<Variable> {
+
+	/**
+	 * 
+	 */
+	private static final long serialVersionUID = -4212803364398351279L;
+
+	public boolean add(Variable v){
+		Variable previous = getVariableNamed(v.getName());
+		if ( previous != null ){
+			this.remove( previous );
+		}
+			
+		return super.add(v);
+	}
+	
+	public Variable getVariableNamed(String name){
+		for (Variable var : this){
+			if (var.getName().equals(name) ){
+				return var;
+			}
+		}
+		return null;
+	}
+	
+	public String[] getVariableNames(){
+		if (this.size() == 0){
+			return null;
+		}
+		String names[] = new String[this.size()];
+		int i = 0;
+		for (Variable var : this){
+			names[i] = var.getName();
+			i++;
+		}
+		return names;
+	}	
+}