1 files changed, 83 insertions, 0 deletions
diff --git a/gi/posterior-regularisation/prjava/src/optimization/gradientBasedMethods/Objective.java b/gi/posterior-regularisation/prjava/src/optimization/gradientBasedMethods/Objective.java
new file mode 100644
index 00000000..0e2e27ac
--- /dev/null
+++ b/gi/posterior-regularisation/prjava/src/optimization/gradientBasedMethods/Objective.java
@@ -0,0 +1,83 @@
+package optimization.gradientBasedMethods;
+
+
+/**
+ * Defines an optimization objective:
+ * 
+ * 
+ * @author javg
+ *
+ */
+public abstract  class Objective {
+
+	protected int functionCalls = 0;
+	protected int gradientCalls = 0;
+	protected int updateCalls = 0;
+	
+	protected double[] parameters;
+	
+	//Contains a cache with the gradient
+	public double[] gradient;
+	int debugLevel = 0;
+	
+	public void setDebugLevel(int level){
+		debugLevel = level;
+	}
+	
+	public int getNumParameters() {
+		return parameters.length;
+	}
+
+	public double getParameter(int index) {
+		return parameters[index];
+	}
+
+	public double[] getParameters() {
+		return parameters;
+	}
+
+	public abstract double[] getGradient( );
+	
+	public void setParameter(int index, double value) {
+		parameters[index]=value;
+	}
+
+	public void setParameters(double[] params) {
+		if(parameters == null){
+			parameters = new double[params.length];
+		}
+		updateCalls++;
+		System.arraycopy(params, 0, parameters, 0, params.length);
+	}
+
+	
+	public int getNumberFunctionCalls() {
+		return functionCalls;
+	}
+
+	public int getNumberGradientCalls() {
+		return gradientCalls;
+	}
+	
+	public String finalInfoString() {
+		return "FE: " + functionCalls + " GE " + gradientCalls + " Params updates" +
+		updateCalls;
+	}
+	public void printParameters() {
+		System.out.println(toString());
+	}	
+	
+	public abstract String toString();	
+	public abstract double getValue ();
+	
+	/**
+	 * Sets the initial objective parameters
+	 * For unconstrained models this just sets the objective params = argument no copying
+	 * For a constrained objective project the parameters and then set
+	 * @param params
+	 */
+	public  void setInitialParameters(double[] params){
+		parameters = params;
+	}
+
+}