Fix IllegalAccessException and NoSuchMethodException on startup

src/graphtea/extensions/AlgorithmUtils.java

@@ -908,4 +908,30 @@ public static Matrix getAverageTransMatrix (GraphModel g) {
         }
         return adj;
     }
+
+    /** Concatenates two arrays into a new array of the same component type. */
+    public static <T> T[] concatArrays(T[] array1, T[] array2) {
+        T[] result = Arrays.copyOf(array1, array1.length + array2.length);
+        System.arraycopy(array2, 0, result, array1.length, array2.length);
+        return result;
+    }
+
+    /**
+     * Returns the eccentricity of every vertex: ecc[v] = max distance from v to any reachable vertex.
+     * Unreachable pairs (distance >= n+1 by FloydWarshall convention) are excluded; isolated vertices get 0.
+     */
+    public static int[] getEccentricities(GraphModel g) {
+        FloydWarshall fw = new FloydWarshall();
+        int[][] dist = fw.getAllPairsShortestPathWithoutWeight(g);
+        int n = g.numOfVertices();
+        int[] ecc = new int[n];
+        for (int v = 0; v < n; v++) {
+            for (int u = 0; u < n; u++) {
+                if (u != v && dist[v][u] < n + 1 && dist[v][u] > ecc[v]) {
+                    ecc[v] = dist[v][u];
+                }
+            }
+        }
+        return ecc;
+    }
 }

src/graphtea/extensions/actions/BarycentricSubdivisionGraph.java

@@ -75,10 +75,6 @@ public String getDescription() {
         return "Barycentric Subdivision Graph";
     }
 
-    @Override
-    public String checkParameters() {
-        return null;
-    }
 
     @Override
     public String getCategory() {

src/graphtea/extensions/actions/CircularVisualization.java

@@ -45,9 +45,6 @@ public static void circularVisualize(int r, int x, int y, SubGraph g) {
         }
     }
 
-    public String checkParameters() {
-        return null;
-    }
 
     @Override
     public String getName() {

src/graphtea/extensions/actions/Composition.java

@@ -37,10 +37,6 @@ public void action(GraphData graphData) {
         graphData.core.showGraph(g);
     }
 
-    @Override
-    public String checkParameters() {
-        return null;
-    }
 
     @Override
     public String getCategory() {

src/graphtea/extensions/actions/Disjunction.java

@@ -36,10 +36,6 @@ public void action(GraphData graphData) {
         graphData.core.showGraph(g);
     }
 
-    @Override
-    public String checkParameters() {
-        return null;
-    }
 
     @Override
     public String getCategory() {

src/graphtea/extensions/actions/LocalityLens.java

@@ -67,10 +67,6 @@ public String getCategory() {
         return "Visualization";
     }
 
-    @Override
-    public String checkParameters() {
-        return null;
-    }
 }
 
 class MouseEventListener implements Listener {

src/graphtea/extensions/actions/ParalineGraph.java

@@ -34,10 +34,6 @@ public String getDescription() {
         return "Paraline Graph";
     }
 
-    @Override
-    public String checkParameters() {
-        return null;
-    }
 
     @Override
     public String getCategory() {

src/graphtea/extensions/actions/Sum.java

@@ -38,10 +38,6 @@ public void action(GraphData graphData) {
         graphData.core.showGraph(g);
     }
 
-    @Override
-    public String checkParameters() {
-        return null;
-    }
 
     @Override
     public String getCategory() {

src/graphtea/extensions/actions/g6/G6CSVStringLoader.java

@@ -75,9 +75,6 @@ public void action(GraphData graphData) {
         }
     }
 
-    public String checkParameters() {
-        return null;
-    }
 
     @Override
     public String getCategory() {

src/graphtea/extensions/actions/g6/G6Checker.java

@@ -42,9 +42,6 @@ public void action(GraphData graphData) {
         }
     }
 
-    public String checkParameters() {
-        return null;
-    }
 
     @Override
     public String getCategory() {

src/graphtea/extensions/actions/g6/G6StringLoader.java

@@ -51,9 +51,6 @@ public void action(GraphData graphData) {
         }
     }
 
-    public String checkParameters() {
-        return null;
-    }
 
     @Override
     public String getCategory() {

src/graphtea/extensions/actions/homomorphism/AHomomorphism.java

@@ -40,10 +40,6 @@ public void action(GraphData graphData) {
         graphData.core.showGraph(g);
     }
 
-    @Override
-    public String checkParameters() {
-        return null;
-    }
 
     @Override
     public String getCategory() {

src/graphtea/extensions/actions/product/CoronaProduct.java

@@ -39,10 +39,6 @@ public void action(GraphData graphData) {
         graphData.core.showGraph(g);
     }
 
-    @Override
-    public String checkParameters() {
-        return null;
-    }
 
     @Override
     public String getCategory() {

src/graphtea/extensions/actions/product/Join.java

@@ -40,10 +40,6 @@ public void action(GraphData graphData) {
         graphData.core.showGraph(g);
     }
 
-    @Override
-    public String checkParameters() {
-        return null;
-    }
 
     @Override
     public String getCategory() {

src/graphtea/extensions/actions/product/Union.java

@@ -40,10 +40,6 @@ public void action(GraphData graphData) {
         graphData.core.showGraph(g);
     }
 
-    @Override
-    public String checkParameters() {
-        return null;
-    }
 
     @Override
     public String getCategory() {

src/graphtea/extensions/generators/CocktailPartyGraph.java

@@ -80,9 +80,6 @@ public GPoint[] getVertexPositions() {
         return PositionGenerators.circle(5, 5, 100000, 100000, 2*n);
     }
 
-    public String checkParameters() {
-    	return null;
-    }
 
     public GraphModel generateGraph() {
         return GraphGenerator.getGraph(false, this);

src/graphtea/extensions/generators/ExampleChainGraph1.java

@@ -3,6 +3,7 @@
 // Copyright (C) 2008 Mathematical Science Department of Sharif University of Technology
 // Distributed under the terms of the GNU General Public License (GPL): http://www.gnu.org/licenses/
 package graphtea.extensions.generators;
+import graphtea.extensions.AlgorithmUtils;
 
 import graphtea.graph.graph.Edge;
 import graphtea.graph.graph.GPoint;
@@ -16,7 +17,6 @@
 import graphtea.plugins.graphgenerator.core.SimpleGeneratorInterface;
 import graphtea.plugins.graphgenerator.core.extension.GraphGeneratorExtension;
 
-import java.util.Arrays;
 import java.util.Collection;
 import java.util.Collections;
 
@@ -59,16 +59,11 @@ public Edge[] getEdges() {
         return ret;
     }
 
-    static <T> T[] concatWithArrayCopy(T[] array1, T[] array2) {
-        T[] result = Arrays.copyOf(array1, array1.length + array2.length);
-        System.arraycopy(array2, 0, result, array1.length, array2.length);
-        return result;
-    }
 
     public GPoint[] getVertexPositions() {
         GPoint[] p1 = PositionGenerators.line(5, 5, 10000, 10000, n);
         GPoint[] p2 = PositionGenerators.line(20, 5, 10000, 10000, n);
-        return concatWithArrayCopy(p1,p2);
+        return AlgorithmUtils.concatArrays(p1,p2);
     }
 
     public String checkParameters() {

src/graphtea/extensions/generators/ExampleChainGraph2.java

@@ -3,6 +3,7 @@
 // Copyright (C) 2008 Mathematical Science Department of Sharif University of Technology
 // Distributed under the terms of the GNU General Public License (GPL): http://www.gnu.org/licenses/
 package graphtea.extensions.generators;
+import graphtea.extensions.AlgorithmUtils;
 
 import graphtea.graph.graph.Edge;
 import graphtea.graph.graph.GPoint;
@@ -16,7 +17,6 @@
 import graphtea.plugins.graphgenerator.core.SimpleGeneratorInterface;
 import graphtea.plugins.graphgenerator.core.extension.GraphGeneratorExtension;
 
-import java.util.Arrays;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -65,16 +65,11 @@ public Edge[] getEdges() {
         return ret.toArray(ee);
     }
 
-    static <T> T[] concatWithArrayCopy(T[] array1, T[] array2) {
-        T[] result = Arrays.copyOf(array1, array1.length + array2.length);
-        System.arraycopy(array2, 0, result, array1.length, array2.length);
-        return result;
-    }
 
     public GPoint[] getVertexPositions() {
         GPoint[] p1 = PositionGenerators.line(5, 5, 10000, 10000, n);
         GPoint[] p2 = PositionGenerators.line(1000, 5, 10000, 10000, n);
-        return concatWithArrayCopy(p1,p2);
+        return AlgorithmUtils.concatArrays(p1,p2);
     }
 
     public String checkParameters() {

src/graphtea/extensions/generators/ExampleChainGraph4.java

@@ -3,6 +3,7 @@
 // Copyright (C) 2008 Mathematical Science Department of Sharif University of Technology
 // Distributed under the terms of the GNU General Public License (GPL): http://www.gnu.org/licenses/
 package graphtea.extensions.generators;
+import graphtea.extensions.AlgorithmUtils;
 
 import graphtea.graph.graph.Edge;
 import graphtea.graph.graph.GPoint;
@@ -16,7 +17,6 @@
 import graphtea.plugins.graphgenerator.core.SimpleGeneratorInterface;
 import graphtea.plugins.graphgenerator.core.extension.GraphGeneratorExtension;
 
-import java.util.Arrays;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -73,17 +73,12 @@ public Edge[] getEdges() {
         return ret.toArray(ee);
     }
 
-    static <T> T[] concatWithArrayCopy(T[] array1, T[] array2) {
-        T[] result = Arrays.copyOf(array1, array1.length + array2.length);
-        System.arraycopy(array2, 0, result, array1.length, array2.length);
-        return result;
-    }
 
     public GPoint[] getVertexPositions() {
         GPoint[] p1 = PositionGenerators.line(5, 5, 10000, 10000, n);
         GPoint[] p2 = PositionGenerators.line(4000, 5, 10000, 10000, n);
         GPoint[] p3 = PositionGenerators.line(2000, 800, 10000, 10000, n-1);
-        return concatWithArrayCopy(concatWithArrayCopy(p1,p2), p3);
+        return AlgorithmUtils.concatArrays(AlgorithmUtils.concatArrays(p1,p2), p3);
     }
 
     public String checkParameters() {

src/graphtea/extensions/generators/ExampleChainGraph5.java

@@ -3,6 +3,7 @@
 // Copyright (C) 2008 Mathematical Science Department of Sharif University of Technology
 // Distributed under the terms of the GNU General Public License (GPL): http://www.gnu.org/licenses/
 package graphtea.extensions.generators;
+import graphtea.extensions.AlgorithmUtils;
 
 import graphtea.graph.graph.Edge;
 import graphtea.graph.graph.GPoint;
@@ -16,7 +17,6 @@
 import graphtea.plugins.graphgenerator.core.SimpleGeneratorInterface;
 import graphtea.plugins.graphgenerator.core.extension.GraphGeneratorExtension;
 
-import java.util.Arrays;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -73,17 +73,12 @@ public Edge[] getEdges() {
         return ret.toArray(ee);
     }
 
-    static <T> T[] concatWithArrayCopy(T[] array1, T[] array2) {
-        T[] result = Arrays.copyOf(array1, array1.length + array2.length);
-        System.arraycopy(array2, 0, result, array1.length, array2.length);
-        return result;
-    }
 
     public GPoint[] getVertexPositions() {
         GPoint[] p1 = PositionGenerators.line(5, 5, 10000, 10000, n);
         GPoint[] p2 = PositionGenerators.line(4000, 5, 10000, 10000, n);
         GPoint[] p3 = PositionGenerators.line(2000, 800, 10000, 10000, n-1);
-        return concatWithArrayCopy(concatWithArrayCopy(p1,p2), p3);
+        return AlgorithmUtils.concatArrays(AlgorithmUtils.concatArrays(p1,p2), p3);
     }
 
     public String checkParameters() {

src/graphtea/extensions/generators/ExampleChainGraph6.java

@@ -3,6 +3,7 @@
 // Copyright (C) 2008 Mathematical Science Department of Sharif University of Technology
 // Distributed under the terms of the GNU General Public License (GPL): http://www.gnu.org/licenses/
 package graphtea.extensions.generators;
+import graphtea.extensions.AlgorithmUtils;
 
 import graphtea.graph.graph.Edge;
 import graphtea.graph.graph.GPoint;
@@ -16,7 +17,6 @@
 import graphtea.plugins.graphgenerator.core.SimpleGeneratorInterface;
 import graphtea.plugins.graphgenerator.core.extension.GraphGeneratorExtension;
 
-import java.util.Arrays;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -66,16 +66,11 @@ public Edge[] getEdges() {
         return ret.toArray(ee);
     }
 
-    static <T> T[] concatWithArrayCopy(T[] array1, T[] array2) {
-        T[] result = Arrays.copyOf(array1, array1.length + array2.length);
-        System.arraycopy(array2, 0, result, array1.length, array2.length);
-        return result;
-    }
 
     public GPoint[] getVertexPositions() {
         GPoint[] p1 = PositionGenerators.line(5, 5, 10000, 10000, n);
         GPoint[] p2 = PositionGenerators.line(4000, 5, 10000, 10000, n);
-        return concatWithArrayCopy(p1,p2);
+        return AlgorithmUtils.concatArrays(p1,p2);
     }
 
     public String checkParameters() {

src/graphtea/extensions/generators/ExampleChainGraph7.java

@@ -3,6 +3,7 @@
 // Copyright (C) 2008 Mathematical Science Department of Sharif University of Technology
 // Distributed under the terms of the GNU General Public License (GPL): http://www.gnu.org/licenses/
 package graphtea.extensions.generators;
+import graphtea.extensions.AlgorithmUtils;
 
 import graphtea.graph.graph.Edge;
 import graphtea.graph.graph.GPoint;
@@ -16,7 +17,6 @@
 import graphtea.plugins.graphgenerator.core.SimpleGeneratorInterface;
 import graphtea.plugins.graphgenerator.core.extension.GraphGeneratorExtension;
 
-import java.util.Arrays;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -69,16 +69,11 @@ public Edge[] getEdges() {
         return ret.toArray(ee);
     }
 
-    static <T> T[] concatWithArrayCopy(T[] array1, T[] array2) {
-        T[] result = Arrays.copyOf(array1, array1.length + array2.length);
-        System.arraycopy(array2, 0, result, array1.length, array2.length);
-        return result;
-    }
 
     public GPoint[] getVertexPositions() {
         GPoint[] p1 = PositionGenerators.line(5, 5, 10000, 10000, 2*n);
         GPoint[] p2 = PositionGenerators.line(4000, 5, 10000, 10000, n + 1);
-        return concatWithArrayCopy(p1,p2);
+        return AlgorithmUtils.concatArrays(p1,p2);
     }
 
     public String checkParameters() {