From e516badf6b875c27ce095c9987aaa4004b98844e Mon Sep 17 00:00:00 2001
From: stuconnolly <stuart02@gmail.com>
Date: Sun, 25 Mar 2012 19:36:35 +0000
Subject: QueryKit: add clear method so query instances can be reused.

---
 Frameworks/QueryKit/Source/QKQuery.h |  1 +
 Frameworks/QueryKit/Source/QKQuery.m | 21 +++++++++++++++++++++
 2 files changed, 22 insertions(+)

diff --git a/Frameworks/QueryKit/Source/QKQuery.h b/Frameworks/QueryKit/Source/QKQuery.h
index 2132a158..c0f925bb 100644
--- a/Frameworks/QueryKit/Source/QKQuery.h
+++ b/Frameworks/QueryKit/Source/QKQuery.h
@@ -100,6 +100,7 @@
 - (id)initWithTable:(NSString *)table;
 
 - (NSString *)query;
+- (void)clear;
 
 - (void)addField:(NSString *)field;
 - (void)addFields:(NSArray *)fields;
diff --git a/Frameworks/QueryKit/Source/QKQuery.m b/Frameworks/QueryKit/Source/QKQuery.m
index d26b9f72..4be29ae2 100644
--- a/Frameworks/QueryKit/Source/QKQuery.m
+++ b/Frameworks/QueryKit/Source/QKQuery.m
@@ -100,11 +100,32 @@ static NSString *QKNoQueryTableException = @"QKNoQueryTable";
 #pragma mark -
 #pragma mark Public API
 
+/**
+ * Requests that the query be built.
+ *
+ * @return The generated query.
+ */
 - (NSString *)query
 {
 	return _query ? [self _buildQuery] : @""; 
 }
 
+/**
+ * Clears anything this instance should know about the query it's building.
+ */
+- (void)clear
+{
+	[self setTable:nil];
+	[self setDatabase:nil];
+	[self setQueryType:(QKQueryType)-1];
+	
+	[_fields removeAllObjects];
+	[_parameters removeAllObjects];
+	[_updateParameters removeAllObjects];
+	[_groupByFields removeAllObjects];
+	[_orderByFields removeAllObjects];
+}
+
 #pragma mark -
 #pragma mark Fields
 
-- 
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