1 files changed, 94 insertions, 0 deletions
diff --git a/petascope/src/petascope/wcps/server/core/CoverageIterator.java b/petascope/src/petascope/wcps/server/core/CoverageIterator.java
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+++ b/petascope/src/petascope/wcps/server/core/CoverageIterator.java
@@ -0,0 +1,94 @@
+/*
+ * 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.ResourceException;
+import petascope.wcps.server.exceptions.WCPSException;
+import org.w3c.dom.*;
+
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+
+public class CoverageIterator implements IRasNode {
+
+    private List<String> coverageNames;
+    private String iteratorName;
+    private boolean dynamic = false;    // created from a Construct Coverage expr?
+
+    public CoverageIterator(Node x, XmlQuery xq) throws WCPSException {
+        IDynamicMetadataSource source = xq.getMetadataSource();
+        coverageNames = new ArrayList<String>();
+        if (!x.getNodeName().equals("coverageIterator")) {
+            throw new WCPSException("Invalid cast from " + x.getNodeName()
+                    + " XML node to CoverageIterator node");
+        }
+
+        Node it = x.getFirstChild();
+        while (it != null) {
+            if (it.getNodeName().equals("#text")) {
+                it = it.getNextSibling();
+                continue;
+            }
+
+            if (it.getNodeName().equals("iteratorVar")) {
+                iteratorName = it.getFirstChild().getNodeValue();
+                System.err.println("*** Iterator variable : " + iteratorName);
+            } else if (it.getNodeName().equals("coverageName")) {
+                String cn = it.getFirstChild().getNodeValue();
+                System.err.println("*** Coverage reference : " + cn);
+                try {
+                    if (!source.coverages().contains(cn)) {
+                        throw new WCPSException("Unknown coverage " + cn);
+                    }
+                } catch (ResourceException e) {
+                    throw new WCPSException(
+                            "Cannot load coverage information!", e);
+                }
+
+                coverageNames.add(cn);
+            }
+
+            it = it.getNextSibling();
+        }
+    }
+
+    public CoverageIterator(String iterator, String coverage) throws WCPSException {
+        coverageNames = new ArrayList<String>();
+        iteratorName = iterator;
+        coverageNames.add(coverage);
+        this.dynamic = true;
+    }
+
+    public Iterator<String> getCoverages() {
+        return coverageNames.iterator();
+    }
+
+    public String getIteratorName() {
+        return iteratorName;
+    }
+
+    public String toRasQL() {
+        // TODO(andreia) : How to translate multiple coverages?
+        return coverageNames.get(0) + " AS " + iteratorName;
+    }
+}