committed Doug's Rocksim loader

[debian/openrocket] / src / net / sf / openrocket / file / rocksim / StreamerHandler.java

diff --git a/src/net/sf/openrocket/file/rocksim/StreamerHandler.java b/src/net/sf/openrocket/file/rocksim/StreamerHandler.java
new file mode 100644 (file)
index 0000000..9db287d
--- /dev/null
+++ b/src/net/sf/openrocket/file/rocksim/StreamerHandler.java
@@ -0,0 +1,95 @@
+/*
+ * StreamerHandler.java
+ */
+package net.sf.openrocket.file.rocksim;
+
+import net.sf.openrocket.aerodynamics.WarningSet;
+import net.sf.openrocket.file.simplesax.ElementHandler;
+import net.sf.openrocket.file.simplesax.PlainTextHandler;
+import net.sf.openrocket.material.Material;
+import net.sf.openrocket.rocketcomponent.RocketComponent;
+import net.sf.openrocket.rocketcomponent.Streamer;
+import org.xml.sax.SAXException;
+
+import java.util.HashMap;
+
+/**
+ * A SAX handler for Streamer components.
+ */
+class StreamerHandler extends PositionDependentHandler<Streamer> {
+
+    /**
+     * The OpenRocket Streamer.
+     */
+    private final Streamer streamer;
+
+    /**
+     * Constructor.
+     *
+     * @param c the parent component
+     * @throws IllegalArgumentException thrown if <code>c</code> is null
+     */
+    public StreamerHandler(RocketComponent c) throws IllegalArgumentException {
+        if (c == null) {
+            throw new IllegalArgumentException("The parent of a streamer may not be null.");
+        }
+        streamer = new Streamer();
+        c.addChild(streamer);
+    }
+
+    @Override
+    public ElementHandler openElement(String element, HashMap<String, String> attributes, WarningSet warnings) {
+        return PlainTextHandler.INSTANCE;
+    }
+
+    @Override
+    public void closeElement(String element, HashMap<String, String> attributes, String content, WarningSet warnings)
+            throws SAXException {
+        super.closeElement(element, attributes, content, warnings);
+
+        try {
+            if ("Width".equals(element)) {
+                streamer.setStripWidth(Math.max(0, Double.parseDouble(content) / RocksimHandler.ROCKSIM_TO_OPENROCKET_LENGTH));
+            }
+            if ("Len".equals(element)) {
+                streamer.setStripLength(Math.max(0, Double.parseDouble(content) / RocksimHandler.ROCKSIM_TO_OPENROCKET_LENGTH));
+            }
+            if ("DragCoefficient".equals(element)) {
+                streamer.setCD(Double.parseDouble(content));
+            }
+            if ("Material".equals(element)) {
+                setMaterialName(content);
+            }
+        }
+        catch (NumberFormatException nfe) {
+            warnings.add("Could not convert " + element + " value of " + content + ".  It is expected to be a number.");
+        }
+    }
+
+    @Override
+    public Streamer getComponent() {
+        return streamer;
+    }
+
+    /**
+     * Set the relative position onto the component.  This cannot be done directly because setRelativePosition is not
+     * public in all components.
+     *
+     * @param position the OpenRocket position
+     */
+    @Override
+    public void setRelativePosition(RocketComponent.Position position) {
+        streamer.setRelativePosition(position);
+    }
+
+    /**
+     * Get the required type of material for this component.
+     *
+     * @return BULK
+     */
+    @Override
+    public Material.Type getMaterialType() {
+        return Material.Type.SURFACE;
+    }
+}
+