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| author | Constantin <jucovschi@gmail.com> | 2010-06-02 20:09:42 +0200 |
|---|---|---|
| committer | Constantin <jucovschi@gmail.com> | 2010-06-02 20:09:42 +0200 |
| commit | 40e12c6af9d05c3413efaf535c35c625b736cbb9 (patch) | |
| tree | 6a9f6b86b55724e659ca270171496d82362de9cc /petascope/src/petascope/wcps/server/core/BooleanScalarExpr.java | |
| parent | fcda34adb1c78d0929778e1324c873552d21ee1d (diff) | |
| download | rasdaman-upstream-40e12c6af9d05c3413efaf535c35c625b736cbb9.tar.gz rasdaman-upstream-40e12c6af9d05c3413efaf535c35c625b736cbb9.tar.xz rasdaman-upstream-40e12c6af9d05c3413efaf535c35c625b736cbb9.zip | |
preparing for joining with rasdaman open source
Diffstat (limited to 'petascope/src/petascope/wcps/server/core/BooleanScalarExpr.java')
| -rw-r--r-- | petascope/src/petascope/wcps/server/core/BooleanScalarExpr.java | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/petascope/src/petascope/wcps/server/core/BooleanScalarExpr.java b/petascope/src/petascope/wcps/server/core/BooleanScalarExpr.java new file mode 100644 index 0000000..1cbe079 --- /dev/null +++ b/petascope/src/petascope/wcps/server/core/BooleanScalarExpr.java @@ -0,0 +1,138 @@ +/*
+ * 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 org.w3c.dom.*;
+
+public class BooleanScalarExpr implements IRasNode {
+
+ private IRasNode first, second;
+ private String op;
+ private boolean simple; // true if the expression is just a value
+ private String value;
+
+ public BooleanScalarExpr(Node node, XmlQuery xq) throws WCPSException, InvalidCrsException {
+ if (node == null) {
+ throw new WCPSException("Unexpected null node !");
+ }
+
+ String nodeName = node.getNodeName();
+
+ simple = false;
+
+ System.err.println("Parsing boolean scalar operation ...");
+
+ if (nodeName.equals("booleanConstant")) {
+ simple = true;
+ value = node.getFirstChild().getNodeValue();
+ } else if (nodeName.equals("booleanAnd")
+ || nodeName.equals("booleanOr")
+ || nodeName.equals("booleanXor")
+ || nodeName.equals("booleanLessThan")
+ || nodeName.equals("booleanLessOrEqual")
+ || nodeName.equals("booleanGreaterThan")
+ || nodeName.equals("booleanGreaterOrEqual")
+ || nodeName.equals("booleanEqualNumeric")
+ || nodeName.equals("booleanNotEqualNumeric")
+ || nodeName.equals("booleanEqualString")
+ || nodeName.equals("booleanNotEqualString")) {
+ // Logical operations
+ if (nodeName.equals("booleanAnd")
+ || nodeName.equals("booleanOr")
+ || nodeName.equals("booleanXor")) {
+ // Remove the "boolean" in front
+ op = nodeName.substring(7).toLowerCase();
+
+ Node child = node.getFirstChild();
+
+ first = new BooleanScalarExpr(child, xq);
+ child = child.getNextSibling();
+ second = new BooleanScalarExpr(child, xq);
+ } else // Boolean Comparison operations between numbers or strings
+ {
+ if (nodeName.equals("booleanLessThan") || nodeName.equals("booleanLessOrEqual")
+ || nodeName.equals("booleanGreaterThan") || nodeName.equals("booleanGreaterOrEqual")
+ || nodeName.equals("booleanEqualNumeric") || nodeName.equals("booleanNotEqualNumeric")) {
+ if (nodeName.equals("booleanLessThan")) {
+ op = "<";
+ }
+ if (nodeName.equals("booleanLessOrEqual")) {
+ op = "<=";
+ }
+ if (nodeName.equals("booleanGreaterThan")) {
+ op = ">";
+ }
+ if (nodeName.equals("booleanGreaterOrEqual")) {
+ op = ">=";
+ }
+ if (nodeName.equals("booleanEqualNumeric")) {
+ op = "=";
+ }
+ if (nodeName.equals("booleanNotEqualNumeric")) {
+ op = "!=";
+ }
+
+ Node child = node.getFirstChild();
+
+ first = new NumericScalarExpr(child, xq);
+ child = child.getNextSibling();
+ second = new NumericScalarExpr(child, xq);
+ } else {
+ if (nodeName.equals("booleanEqualString")) {
+ op = "=";
+ }
+ if (nodeName.equals("booleanNotEqualString")) {
+ op = "!=";
+ }
+
+ Node child = node.getFirstChild();
+
+ first = new StringScalarExpr(child, xq);
+ child = child.getNextSibling();
+ second = new StringScalarExpr(child, xq);
+ }
+ }
+
+ } else if (nodeName.equals("booleanNot")) {
+ op = "not";
+ first = new BooleanScalarExpr(node.getFirstChild(), xq);
+ } else {
+ throw new WCPSException("Unexpected Binary Expression node : "
+ + node.getNodeName());
+ }
+ System.err.println("*** Boolean Scalar Expr SUCCESS: " + node.getNodeName());
+ }
+
+ public String toRasQL() {
+ if (simple) {
+ return value;
+ }
+
+ if (op.equals("not")) {
+ return "not(" + first.toRasQL() + ")";
+ }
+
+ return "(" + first.toRasQL() + ")" + op + "(" + second.toRasQL() + ")";
+ }
+}
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