1 files changed, 46 insertions, 0 deletions
diff --git a/base/src/main/java/bjc/utils/parserutils/DoubleMatcher.java b/base/src/main/java/bjc/utils/parserutils/DoubleMatcher.java
new file mode 100644
index 0000000..a885808
--- /dev/null
+++ b/base/src/main/java/bjc/utils/parserutils/DoubleMatcher.java
@@ -0,0 +1,46 @@
+package bjc.utils.parserutils;
+
+import static bjc.utils.PropertyDB.applyFormat;
+import static bjc.utils.PropertyDB.getRegex;
+
+import java.util.regex.Pattern;
+
+/*
+ * Checks if a string would pass Double.parseDouble.
+ *
+ * Uses a regex from the javadoc for Double.valueOf()
+ */
+class DoubleMatcher {
+	/*
+	 * Unit pieces.
+	 */
+	private static final String	rDecDigits	= getRegex("fpDigits");
+	private static final String	rHexDigits	= getRegex("fpHexDigits");
+	private static final String	rExponent	= applyFormat("fpExponent", getRegex("fpExponent"), rDecDigits);
+
+	/*
+	 * Decimal floating point numbers.
+	 */
+	private static final String	rSimpleDec	= applyFormat("fpDecimalDecimal", rDecDigits, rExponent);
+	private static final String	rSimpleIntDec	= applyFormat("fpDecimalInteger", rDecDigits, rExponent);
+
+	/*
+	 * Hex floating point numbers.
+	 */
+	private static final String	rHexInt		= applyFormat("fpHexInteger", rHexDigits);
+	private static final String	rHexDec		= applyFormat("fpHexDecimal", rHexDigits);
+	private static final String	rHexLead	= applyFormat("fpHexLeader", rHexInt, rHexDec);
+	private static final String	rHexString	= applyFormat("fpHexString", rHexLead, rDecDigits);
+
+	/*
+	 * Floating point components.
+	 */
+	private static final String	rFPLeader	= getRegex("fpLeader");
+	private static final String	rFPNum		= applyFormat("fpNumber", rSimpleIntDec, rSimpleDec, rHexString);
+
+	/*
+	 * Full double.
+	 */
+	private static final String	rDouble		= applyFormat("fpDouble", rFPLeader, rFPNum);
+	public static final Pattern	doubleLiteral	= Pattern.compile("\\A" + rDouble + "\\Z");
+}