From 860d446d28776ec842fa53e8e08538d4e093d6e9 Mon Sep 17 00:00:00 2001
From: snowleo <schneeleo@gmail.com>
Date: Wed, 12 Oct 2011 03:14:07 +0200
Subject: EssentialsUpdate WIP

---
 .../net/irc/martyr/util/ParameterIterator.java     | 124 +++++++++++++++++++++
 1 file changed, 124 insertions(+)
 create mode 100644 EssentialsUpdate/src/f00f/net/irc/martyr/util/ParameterIterator.java

(limited to 'EssentialsUpdate/src/f00f/net/irc/martyr/util/ParameterIterator.java')

diff --git a/EssentialsUpdate/src/f00f/net/irc/martyr/util/ParameterIterator.java b/EssentialsUpdate/src/f00f/net/irc/martyr/util/ParameterIterator.java
new file mode 100644
index 000000000..d1e2c8507
--- /dev/null
+++ b/EssentialsUpdate/src/f00f/net/irc/martyr/util/ParameterIterator.java
@@ -0,0 +1,124 @@
+/*
+ * Original author: Ben Damm <bdamm@dammfine.com>
+ * Changes by: Mog
+ * 	- Fixed bug with substring handling
+ * 	*/
+package f00f.net.irc.martyr.util;
+
+
+import java.util.Iterator;
+import java.util.NoSuchElementException;
+
+//TODO: Unit test
+
+/**
+ * This class iterates over the parameter string of an IRC command,
+ * returning each parameter in order as next() is called.  This class
+ * also knows about the ":" parameters, which is the large string at
+ * the end of most commands, and treats it specially.
+ */
+public class ParameterIterator implements Iterator
+{
+    //static Logger log = Logger.getLogger(ParameterIterator.class);
+
+    private String paramStr;
+	private int position;
+	private String last = null;
+	
+	public ParameterIterator( String paramStr )
+	{
+		//log.debug("ParameterIterator: Params: `" + paramStr + "'");
+		// We don't check for null here because hasNext is the place
+		// to do it, according to the definition for Iterator.
+		// next() should throw an exception.
+		if( paramStr != null )
+		{
+			this.paramStr = paramStr.trim();
+			position = 0;
+		}
+		else
+		{
+			this.paramStr = null;
+			position = -1;
+		}
+	}
+	
+	/**
+	 * @return true if there are more parameters, and false
+	 * otherwise.
+	 */
+	public boolean hasNext()
+	{
+		if( paramStr == null )
+			return false;
+		
+		return position < paramStr.length();
+	}
+
+	/**
+	 * @throws NoSuchElementException if there are no more params
+	 * @return true if the next parameter is also the ":" parameter.
+	 * */
+	public boolean nextIsLast()
+	{
+		if( ! hasNext() )
+		{
+			throw new NoSuchElementException("No more parameters.");
+		}
+		return paramStr.charAt(position) == ':';
+	}
+
+	/**
+	 * @throws NoSuchElementException if there are no more params
+	 * */
+	public Object next()
+	{
+		if( ! hasNext() )
+		{
+			throw new NoSuchElementException("No more parameters.");
+		}
+		
+		// If : is the first char, the rest of the string is a
+		// parameter.
+		if( paramStr.charAt(position) == ':' )
+		{
+			String result = paramStr.substring(position + 1);
+			position = paramStr.length();
+			last = result;
+			return result;
+		}
+		
+		int spaceIndex = paramStr.indexOf( ' ', position );
+		// We can't have a space after the last parameter, it gets
+		// trimmed in the constructor.  Also, we can't have only
+		// spaces, so we don't need to check for -1.  Finally, we are
+		// guaranteed to have a space before the colon, so we don't
+		// have to do any checking at all!
+		
+		String result = paramStr.substring( position, spaceIndex );
+		position = spaceIndex + 1;
+		return result;
+	}
+
+	/**
+	 * Forwards the iterator to the last element and returns it.  The
+	 * "last" parameter should be the ":" parameter.
+     *
+     * @return Last parameter
+	 * */
+	public String last()
+	{
+		while( hasNext() )
+			next();
+
+		return last;
+	}
+	
+	public void remove()
+	{
+		// hmm, nah.  This can be implemented some other time.
+		throw new UnsupportedOperationException( "Remove on the parameters? Why?" );
+	}
+}
+
+
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