From a023de85aa08c8f2b8b2441c6b14064eabee2775 Mon Sep 17 00:00:00 2001
From: bculkin2442 <bjculkin@mix.wvu.edu>
Date: Sat, 2 Apr 2016 15:07:33 -0400
Subject: Began work on general configuration stuff.

I'll leave this sit for a while, and come back to it after some thought
---
 .../java/bjc/utils/configuration/ConfigFile.java   | 147 +++++++++++++++++++++
 1 file changed, 147 insertions(+)
 create mode 100644 BJC-Utils2/src/main/java/bjc/utils/configuration/ConfigFile.java

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

diff --git a/BJC-Utils2/src/main/java/bjc/utils/configuration/ConfigFile.java b/BJC-Utils2/src/main/java/bjc/utils/configuration/ConfigFile.java
new file mode 100644
index 0000000..056f775
--- /dev/null
+++ b/BJC-Utils2/src/main/java/bjc/utils/configuration/ConfigFile.java
@@ -0,0 +1,147 @@
+package bjc.utils.configuration;
+
+import java.io.InputStream;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Scanner;
+
+import javax.lang.model.SourceVersion;
+
+/**
+ * A config file with support for categories, comments and other thins
+ * 
+ * @author ben
+ *
+ */
+public class ConfigFile {
+	private static Map<String, ConfigCategory> topLevelCategories;
+
+	/**
+	 * A category in a configuration file
+	 * @author ben
+	 *
+	 */
+	public static class ConfigCategory {
+		private Map<String, ConfigCategory> children;
+
+		/**
+		 * Create a new config category
+		 */
+		public ConfigCategory() {
+			children = new HashMap<>();
+		}
+
+		public void addChild(String childName, ConfigCategory child) {
+			children.put(childName, child);
+		}
+	}
+
+	/**
+	 * Parse the values in a config file from a stream
+	 * 
+	 * @param source
+	 *            The stream to parse values from
+	 * @return A config file with values parsed from the stream
+	 */
+	public static ConfigFile parse(InputStream source) {
+		Scanner scn = new Scanner(source);
+
+		ConfigFile returnedFile = new ConfigFile();
+
+		while (scn.hasNextLine()) {
+			String currentLine = scn.nextLine();
+
+			// Ignore blank lines
+			if (currentLine.equals("")) {
+				continue;
+			}
+
+			String[] currentTokens = currentLine.split(" ");
+
+			// Ignore lines that start with a comment marker
+			if (isCommentMarker(currentTokens[0])) {
+				continue;
+			} else if (SourceVersion.isName(currentTokens[0])
+					&& currentTokens[1].equals("{")) {
+				topLevelCategories.put(currentTokens[0], parseCategory(currentTokens[0], scn));
+			}
+		}
+
+		return returnedFile;
+	}
+
+	private static ConfigCategory parseCategory(String categoryName,
+			Scanner inputSource) {
+		ConfigCategory category = new ConfigCategory();
+
+		String currentLine = inputSource.nextLine();
+
+		String[] tokens = currentLine.split("\\s+ ");
+
+		// Parse contents of category
+		while (!tokens[0].equals("}")) {
+			// Ignore lines starting with comment marker
+			if (isCommentMarker(tokens[0])) {
+				continue;
+			}
+
+			int initialCommandToken = 0;
+
+			// Skip over blank tokens from lots of spacing
+			for (int i = 0; i < tokens.length; i++) {
+				String token = tokens[i];
+
+				if (token.equals("")) {
+					continue;
+				} else {
+					initialCommandToken = i;
+					break;
+				}
+			}
+
+			String[] relevantTokens = Arrays.copyOfRange(tokens,
+					initialCommandToken, tokens.length);
+
+			// Parse child subcategories
+			if (SourceVersion.isName(relevantTokens[0])
+					&& relevantTokens[1].equals("{")) {
+				parseCategory(relevantTokens[0], inputSource);
+			} else {
+				// Parse config fields
+				parseEntry(category, relevantTokens);
+			}
+			currentLine = inputSource.nextLine();
+
+			tokens = currentLine.split("\\s+ ");
+		}
+
+		return category;
+	}
+
+	private static void parseEntry(ConfigCategory category,
+			String[] entryParts) {
+		String entry = String.join("", entryParts);
+
+		String[] expParts = entry.split("=");
+
+		String[] expSpecifiers = expParts[0].split(":");
+
+		String expType = expSpecifiers[0];
+		String expName = expSpecifiers[1];
+
+		switch (expType) {
+
+		}
+	}
+
+	private static boolean isCommentMarker(String token) {
+		switch (token) {
+			case "#":
+			case "//":
+				return true;
+			default:
+				return false;
+		}
+	}
+}
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