--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gnv-artifacts/src/main/java/de/intevation/gnv/jfreechart/CompactXYItems.java	Fri Sep 28 12:13:56 2012 +0200
@@ -0,0 +1,199 @@
+package de.intevation.gnv.jfreechart;
+
+import java.io.Serializable;
+
+/**
+ * This class is used to represent geometries (e.g. point, line, polygon). Each
+ * geometry is made up of multiple xy points stored in a single array. A line
+ * composed by start- and endpoint is stored in the following order in that
+ * array: [x1, y1, x2, y2].
+ *
+ * @author <a href="mailto:sascha.teichmann@intevation.de">Sascha Teichmann</a>
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class CompactXYItems
+implements   Serializable
+{
+    /**
+     * Array storing the xy items.
+     */
+    protected double [] data;
+
+    /**
+     * Constructs a new CompactXYItems object with the given data.
+     *
+     * @param data An array with xy values.
+     */
+    public CompactXYItems(double [] data) {
+        this.data = data;
+    }
+
+    /**
+     * Retrieves the x coordinate of the point with the given index.
+     *
+     * @param index Index
+     * @return X coordinate.
+     */
+    public double getX(int index) {
+        return data[index << 1];
+    }
+
+    /**
+     * Retrieves the y coordinate of the point with the given index.
+     *
+     * @param index Index
+     * @return Y coordinate.
+     */
+    public double getY(int index) {
+        return data[(index << 1)+1];
+    }
+
+    /**
+     * Write the tupel of xy-values at a specific index into the given array.
+     *
+     * @param index Index used to specify the xy-value.
+     * @param xy the xy coordinate is written into this array with the following
+     * order: [x,y]
+     */
+    public void get(int index, double [] xy) {
+        xy[0] = data[index = (index << 1) + 1];
+        xy[1] = data[index + 1];
+    }
+
+    /**
+     *
+     * @return the data array.
+     */
+    public double [] getData() {
+        return data;
+    }
+
+    /**
+     *
+     * @param data
+     */
+    public void setData(double [] data) {
+        this.data = data;
+    }
+
+    /**
+     *
+     * @return the number of data points.
+     */
+    public int size() {
+        return data.length >> 1;
+    }
+
+    /**
+     * Retrieves the bounding box spaned by the coordinates in the data array.
+     *
+     * @param bbox
+     * @return the calculated bounding box.
+     */
+    public double [] calculateBoundingBox(double [] bbox)  {
+        for (int i = 0; i < data.length;) {
+            double x = data[i++];
+            double y = data[i++];
+            if (x < bbox[0]) bbox[0] = x;
+            if (y < bbox[1]) bbox[1] = y;
+            if (x > bbox[2]) bbox[2] = x;
+            if (y > bbox[3]) bbox[3] = y;
+        }
+        return bbox;
+    }
+
+    /**
+     *
+     * @return the coordinates as string.
+     */
+    @Override
+    public String toString() {
+        StringBuilder sb = new StringBuilder();
+        for (int i = 0; i < data.length;) {
+            if (i > 0) sb.append("; ");
+            sb.append('(');
+            sb.append(data[i++]);
+            sb.append(", ");
+            sb.append(data[i++]);
+            sb.append(')');
+        }
+        return sb.toString();
+    }
+
+
+    /**
+     *
+     * @return the lowest x value.
+     */
+    public double getMinX() {
+        double lower = Double.POSITIVE_INFINITY;
+
+        for (int i = 0; i < data.length; i += 2) {
+            double x = data[i];
+
+            if (!Double.isNaN(x)) {
+                lower = Math.min(lower, x);
+            }
+        }
+
+        return lower;
+    }
+
+
+    /**
+     *
+     * @return the highest x value.
+     */
+    public double getMaxX() {
+        double upper = Double.NEGATIVE_INFINITY;
+
+        for (int i = 0; i < data.length; i += 2) {
+            double x = data[i];
+
+            if (!Double.isNaN(x)) {
+                upper = Math.max(upper, x);
+            }
+        }
+
+        return upper;
+    }
+
+
+    /**
+     *
+     * @return the lowest y value.
+     */
+    public double getMinY() {
+        double lower = Double.POSITIVE_INFINITY;
+
+        for (int i = 1; i < data.length; i += 2) {
+            double y = data[i];
+
+            if (!Double.isNaN(y)) {
+                lower = Math.min(lower, y);
+            }
+        }
+
+        return lower;
+    }
+
+
+    /**
+     *
+     * @return the highest y value.
+     */
+    public double getMaxY() {
+        double upper = Double.NEGATIVE_INFINITY;
+
+        for (int i = 1; i < data.length; i += 2) {
+            double y = data[i];
+
+            if (!Double.isNaN(y)) {
+                upper = Math.max(upper, y);
+            }
+        }
+
+        return upper;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :