1 files changed, 111 insertions, 0 deletions
diff --git a/petascope/src/petascope/wcps/server/core/AxisIterator.java b/petascope/src/petascope/wcps/server/core/AxisIterator.java
new file mode 100644
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+++ b/petascope/src/petascope/wcps/server/core/AxisIterator.java
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+/*
+ * This file is part of PetaScope.
+ *
+ * PetaScope is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version.
+ *
+ * PetaScope is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with PetaScope. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * For more information please see <http://www.PetaScope.org>
+ * or contact Peter Baumann via <baumann@rasdaman.com>.
+ *
+ * Copyright 2009 Jacobs University Bremen, Peter Baumann.
+ */
+package petascope.wcps.server.core;
+
+import petascope.wcps.server.exceptions.InvalidCrsException;
+import petascope.wcps.server.exceptions.WCPSException;
+import java.math.BigInteger;
+import org.w3c.dom.*;
+
+public class AxisIterator implements IRasNode {
+
+    private String var, varTranslation;
+    private AxisName axis;
+    private NumericScalarExpr hi, lo;
+
+    public AxisIterator(Node node, XmlQuery xq, String newIteratorName) throws WCPSException, InvalidCrsException {
+        while ((node != null) && node.getNodeName().equals("#text")) {
+            node = node.getNextSibling();
+        }
+        System.err.println("Trying to parse AxisIterator ");
+
+        while (node != null) {
+            String nodeName = node.getNodeName();
+
+            if (nodeName.equals("iteratorVar")) {
+                var = node.getTextContent();
+                // This variable will be referenced later on. Translate it.
+                xq.addReferenceVariable(var, newIteratorName);
+                varTranslation = xq.getReferenceVariableName(var);
+            } else if (nodeName.equals("axis")) {
+                axis = new AxisName(node, xq);
+            } else {
+                // Should contain the limits
+                // TODO: Implement ImageCrsDomainMetadataType class
+                if (lo == null) {
+                    lo = new NumericScalarExpr(node, xq);
+                } else if (hi == null) {
+                    hi = new NumericScalarExpr(node, xq);
+                } else {
+                    throw new WCPSException("Unknown node in AxisIterator: " + nodeName);
+                }
+            }
+
+            node = node.getNextSibling();
+            while ((node != null) && node.getNodeName().equals("#text")) {
+                node = node.getNextSibling();
+            }
+        }
+    }
+
+    public String toRasQL() {
+        String result = varTranslation + " in [" + lo.toRasQL() + ":" + hi.toRasQL() + "]";
+        return result;
+    }
+
+    /** Sets a new name for the iterator variable, to be used in the rasql query**/
+    public void setVariableTranslation(String newName) {
+        varTranslation = newName;
+    }
+
+    /** Return the Higher bound for the axis iterator.
+     * This only works for constant expressions.
+     * TODO: implement arbitrary expressions.
+     * @return BigInteger
+     */
+    public BigInteger getHigh() {
+        return SDU.str2integer(hi.toRasQL()).get(0);
+    }
+
+    /** Return the Lower bound for the axis iterator.
+     * This only works for constant expressions.
+     * TODO: implement arbitrary expressions.
+     * @return BIgInteger
+     */
+    public BigInteger getLow() {
+        return SDU.str2integer(lo.toRasQL()).get(0);
+    }
+
+    /* Return the variable name used in this axis */
+    public String getVar() {
+        return var;
+    }
+
+    public String getAxisType() {
+        return axis.toRasQL();
+    }
+
+    /* Returns the m-interval that this axis iterates over in a string form */
+    public String getInterval() {
+        return lo.toRasQL() + ":" + hi.toRasQL();
+    }
+}