From 0ff9ed78aadb32f85ee3e37f5574d7ca2e12cdf5 Mon Sep 17 00:00:00 2001
From: bjculkin <bjculkin@mix.wvu.edu>
Date: Thu, 6 Apr 2017 16:02:03 -0400
Subject: Add simple property setup

---
 .../java/bjc/utils/ioutils/SimpleProperties.java   | 141 +++++++++++++++++++++
 1 file changed, 141 insertions(+)
 create mode 100644 BJC-Utils2/src/main/java/bjc/utils/ioutils/SimpleProperties.java

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

diff --git a/BJC-Utils2/src/main/java/bjc/utils/ioutils/SimpleProperties.java b/BJC-Utils2/src/main/java/bjc/utils/ioutils/SimpleProperties.java
new file mode 100644
index 0000000..e3b0122
--- /dev/null
+++ b/BJC-Utils2/src/main/java/bjc/utils/ioutils/SimpleProperties.java
@@ -0,0 +1,141 @@
+package bjc.utils.ioutils;
+
+import java.io.InputStream;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.NoSuchElementException;
+import java.util.Scanner;
+import java.util.Set;
+
+/**
+ * Simple file based properties.
+ * 
+ * @author EVE
+ *
+ */
+public class SimpleProperties implements Map<String, String> {
+	private static Map<String, String> props;
+
+	/**
+	 * Create a new set of simple properties.
+	 */
+	public SimpleProperties() {
+		props = new HashMap<>();
+	}
+
+	/**
+	 * Load properties from the provided input stream.
+	 * 
+	 * The format is the name, a space, then the body.
+	 * 
+	 * All leading/trailing spaces from the name & body are removed.
+	 * 
+	 * @param is
+	 *                The stream to read from.
+	 * 
+	 * @param allowDuplicates
+	 *                Whether or not duplicate keys should be allowed.
+	 */
+	public void loadFrom(InputStream is, boolean allowDuplicates) {
+		try(Scanner scn = new Scanner(is)) {
+			while(scn.hasNextLine()) {
+				String ln = scn.nextLine().trim();
+
+				/*
+				 * Skip blank lines/comments
+				 */
+				if(ln.equals("")) continue;
+				if(ln.equals("#")) continue;
+
+				int sepIdx = ln.indexOf(' ');
+
+				if(sepIdx == -1) {
+					throw new NoSuchElementException(
+							"Properties must be a name, a space, then the body");
+				}
+
+				String name = ln.substring(0, sepIdx).trim();
+				String body = ln.substring(sepIdx).trim();
+
+				if(!allowDuplicates && containsKey(name)) {
+					String msg = String.format("Duplicate key '%s'", name);
+
+					throw new IllegalStateException(msg);
+				}
+
+				put(name, body);
+			}
+		}
+	}
+
+	@Override
+	public int size() {
+		return props.size();
+	}
+
+	@Override
+	public boolean isEmpty() {
+		return props.isEmpty();
+	}
+
+	@Override
+	public boolean containsKey(Object key) {
+		return props.containsKey(key);
+	}
+
+	@Override
+	public boolean containsValue(Object value) {
+		return props.containsValue(value);
+	}
+
+	@Override
+	public String get(Object key) {
+		return props.get(key);
+	}
+
+	@Override
+	public String put(String key, String value) {
+		return props.put(key, value);
+	}
+
+	@Override
+	public String remove(Object key) {
+		return props.remove(key);
+	}
+
+	@Override
+	public void putAll(Map<? extends String, ? extends String> m) {
+		props.putAll(m);
+	}
+
+	@Override
+	public void clear() {
+		props.clear();
+	}
+
+	@Override
+	public Set<String> keySet() {
+		return props.keySet();
+	}
+
+	@Override
+	public Collection<String> values() {
+		return props.values();
+	}
+
+	@Override
+	public Set<java.util.Map.Entry<String, String>> entrySet() {
+		return props.entrySet();
+	}
+
+	@Override
+	public boolean equals(Object o) {
+		return props.equals(o);
+	}
+
+	@Override
+	public int hashCode() {
+		return props.hashCode();
+	}
+}
-- 
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