From 98e6ac3f053ab2d8894514df3238cb5fd0101c98 Mon Sep 17 00:00:00 2001
From: bjculkin <bjculkin@mix.wvu.edu>
Date: Mon, 20 Mar 2017 16:20:38 -0400
Subject: Add sample predicated openers/closers

This adds a sample predicated opener/closer pair based off of regular
expressions.

The opener accepts a regular expression and will provide all of its
numbered captured groups.

The closer accepts a format string and uses the parameters (capture
groups) as the format parameters.
---
 .../bjc/utils/parserutils/delims/RegexCloser.java  | 22 ++++++++++++
 .../bjc/utils/parserutils/delims/RegexOpener.java  | 39 ++++++++++++++++++++++
 2 files changed, 61 insertions(+)
 create mode 100644 BJC-Utils2/src/main/java/bjc/utils/parserutils/delims/RegexCloser.java
 create mode 100644 BJC-Utils2/src/main/java/bjc/utils/parserutils/delims/RegexOpener.java

(limited to 'BJC-Utils2/src/main/java/bjc/utils')

diff --git a/BJC-Utils2/src/main/java/bjc/utils/parserutils/delims/RegexCloser.java b/BJC-Utils2/src/main/java/bjc/utils/parserutils/delims/RegexCloser.java
new file mode 100644
index 0000000..9ec2353
--- /dev/null
+++ b/BJC-Utils2/src/main/java/bjc/utils/parserutils/delims/RegexCloser.java
@@ -0,0 +1,22 @@
+package bjc.utils.parserutils.delims;
+
+import java.util.function.BiPredicate;
+
+public class RegexCloser implements BiPredicate<String, String[]> {
+	private String rep;
+
+	public RegexCloser(String closer) {
+		rep = closer;
+	}
+
+	@Override
+	public boolean test(String closer, String[] params) {
+		/*
+		 * Confirm passing an array instead of a single var-arg.
+		 */
+		String work = String.format(rep, (Object[]) params);
+
+		return work.equals(closer);
+	}
+
+}
\ No newline at end of file
diff --git a/BJC-Utils2/src/main/java/bjc/utils/parserutils/delims/RegexOpener.java b/BJC-Utils2/src/main/java/bjc/utils/parserutils/delims/RegexOpener.java
new file mode 100644
index 0000000..c9965f2
--- /dev/null
+++ b/BJC-Utils2/src/main/java/bjc/utils/parserutils/delims/RegexOpener.java
@@ -0,0 +1,39 @@
+package bjc.utils.parserutils.delims;
+
+import bjc.utils.data.IPair;
+import bjc.utils.data.Pair;
+
+import java.util.function.Function;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public class RegexOpener implements Function<String, IPair<String, String[]>> {
+	private String name;
+
+	private Pattern patt;
+
+	public RegexOpener(String groupName, String groupRegex) {
+		name = groupName;
+
+		patt = Pattern.compile(groupRegex);
+	}
+
+	@Override
+	public IPair<String, String[]> apply(String str) {
+		Matcher m = patt.matcher(str);
+
+		if(m.matches()) {
+			int numGroups = m.groupCount();
+
+			String[] parms = new String[numGroups + 1];
+
+			for(int i = 0; i <= numGroups; i++) {
+				parms[i] = m.group(i);
+			}
+
+			return new Pair<>(name, parms);
+		}
+
+		return new Pair<>(null, null);
+	}
+}
\ No newline at end of file
-- 
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