diff options
Diffstat (limited to 'petascope/src/petascope/wcps/server/core/NumericScalarExpr.java')
| -rw-r--r-- | petascope/src/petascope/wcps/server/core/NumericScalarExpr.java | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/petascope/src/petascope/wcps/server/core/NumericScalarExpr.java b/petascope/src/petascope/wcps/server/core/NumericScalarExpr.java new file mode 100644 index 0000000..30ef3da --- /dev/null +++ b/petascope/src/petascope/wcps/server/core/NumericScalarExpr.java @@ -0,0 +1,173 @@ +/*
+ * 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 NumericScalarExpr implements IRasNode {
+
+ private IRasNode first, second;
+ private String op, value;
+ private boolean twoChildren;
+ private double dvalue;
+
+ public NumericScalarExpr(Node node, XmlQuery xq) throws WCPSException, InvalidCrsException {
+ twoChildren = false;
+ String nodeName = node.getNodeName();
+
+ op = "";
+
+ System.err.println("Trying to parse numeric scalar expression ...");
+
+ while ((node != null) && node.getNodeName().equals("#text")) {
+ node = node.getNextSibling();
+ }
+
+ if (nodeName.equals("numericConstant")) {
+ twoChildren = false;
+ op = code(nodeName);
+ value = node.getFirstChild().getNodeValue();
+ try {
+ dvalue = Double.parseDouble(value);
+ } catch (NumberFormatException e) {
+ throw new WCPSException("Could not understand constant: " + value);
+ }
+ } else if (nodeName.equals("complexConstant")
+ || nodeName.equals("condense")
+ || nodeName.equals("reduce")) {
+ op = code(nodeName);
+ twoChildren = false;
+ if (nodeName.equals("complexConstant")) {
+ first = new ComplexConstant(node, xq);
+ }
+ if (nodeName.equals("condense")) {
+ first = new CondenseScalarExpr(node, xq);
+ }
+ if (nodeName.equals("reduce")) {
+ first = new ReduceScalarExpr(node, xq);
+ }
+ } else if (nodeName.equals("numericUnaryMinus")
+ || nodeName.equals("numericSqrt")
+ || nodeName.equals("numericAbs")) {
+ op = code(nodeName);
+ twoChildren = false;
+ first = new NumericScalarExpr(node.getFirstChild(), xq);
+ } else if (nodeName.equals("numericAdd")
+ || nodeName.equals("numericMinus")
+ || nodeName.equals("numericMult")
+ || nodeName.equals("numericDiv")) {
+ try {
+ op = code(nodeName);
+ twoChildren = true;
+ Node child = node.getFirstChild();
+ first = new NumericScalarExpr(child, xq);
+ second = new NumericScalarExpr(child.getNextSibling(), xq);
+ } catch (WCPSException e) {
+ System.err.println("Failed to parse a numeric expression pair !");
+ }
+ } else if (nodeName.equals("variableRef")) {
+ try {
+ op = code(nodeName);
+ twoChildren = false;
+ first = new VariableReference(node, xq);
+ System.err.println("Matched variable reference: " + first.toRasQL());
+ } catch (WCPSException e) {
+ System.err.println("Failed to match variable reference: "
+ + e.toString());
+ }
+ } else {
+ throw new WCPSException("Unexpected Numeric Scalar Expression node : "
+ + node.getNodeName());
+ }
+ }
+
+ public String toRasQL() {
+ String result = "";
+ if (twoChildren == false)
+ {
+ if (op.equals("variable")) {
+ result = first.toRasQL();
+ } else if (op.equals("value")) {
+ result = value;
+ } else if (op.equals("-")) {
+ result = "-" + first.toRasQL();
+ } else if (op.equals("sqrt")) {
+ result = "sqrt(" + first.toRasQL() + ")";
+ } else if (op.equals("child")) {
+ result = first.toRasQL();
+ } else if (op.equals("abs")) {
+ result = "abs(" + first.toRasQL() + ")";
+ }
+ }else if (twoChildren == true) {
+ result = "(" + first.toRasQL() + ")" + op
+ + "(" + second.toRasQL() + ")";
+ } else {
+ return " error ";
+ }
+
+ return result;
+ }
+
+ private String code(String name) {
+ String op = "";
+ if (name.equals("numericConstant")) {
+ op = "value";
+ }
+ if (name.equals("numericUnaryMinus") || name.equals("numericMinus")) {
+ op = "-";
+ }
+ if (name.equals("numericAdd")) {
+ op = "+";
+ }
+ if (name.equals("numericMult")) {
+ op = "*";
+ }
+ if (name.equals("numericDiv")) {
+ op = "/";
+ }
+ if (name.equals("numericSqrt")) {
+ op = "sqrt";
+ }
+ if (name.equals("numericAbs")) {
+ op = "abs";
+ }
+ if (name.equals("condense") || name.equals("reduce")
+ || name.equals("complexConstant")) {
+ op = "child";
+ }
+ if (name.equals("variableRef")) {
+ op = "variable";
+ }
+
+ return op;
+ }
+
+ public boolean isSingleValue() {
+ return op.equals("value");
+ }
+
+ public double getSingleValue() {
+ return dvalue;
+ }
+}
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