From f7c788d2c450aeb5b23e6c97912b74cf2cc01cee Mon Sep 17 00:00:00 2001
From: Nikolaus Krismer <nikolaus.krismer@uibk.ac.at>
Date: Tue, 26 Aug 2014 12:33:33 +0200
Subject: [PATCH] added precaching for placeholder preparation
---
.../java/it/unibz/inf/isochrone/db/Database.java | 16 +++++++++++++++-
1 file changed, 15 insertions(+), 1 deletion(-)
diff --git a/src/main/java/it/unibz/inf/isochrone/db/Database.java b/src/main/java/it/unibz/inf/isochrone/db/Database.java
index 697909fe..201f307b 100644
--- a/src/main/java/it/unibz/inf/isochrone/db/Database.java
+++ b/src/main/java/it/unibz/inf/isochrone/db/Database.java
@@ -42,6 +42,7 @@ import java.util.Set;
* @version 2.2
*/
public class Database {
+ private static final String[] PRECACHED_PLACEHOLDERS;
protected static final byte NW_MODE_CONTINUOUS = 0;
protected static final byte NW_MODE_DISCRETE = 1;
private final String queryEarliestArrivalTimeHomo;
@@ -67,6 +68,16 @@ public class Database {
protected Mode mode;
protected boolean isIncoming;
+ // Static block
+
+ static {
+ final int preachingLength = 10;
+ PRECACHED_PLACEHOLDERS = new String[preachingLength];
+ for (int i = 0; i < preachingLength; ++i) {
+ PRECACHED_PLACEHOLDERS[i] = preparePlaceHolders(i);
+ }
+ }
+
// Constructor
public Database(final ConfigDataset config, final Mode mode, final Direction direction) {
@@ -84,7 +95,7 @@ public class Database {
+ " WHERE SOURCE = ? AND TARGET = ? AND ROUTE_ID IN (%S) AND (TIME_D BETWEEN ? AND ?) AND SERVICE_ID IN (%S) AND TIME_A <= ?";
queryLatestDepartureTimeHomo = "SELECT TIME_D, TIME_A, ROUTE_ID FROM " + configSchedule
- + " WHERE SOURCE = ? AND TARGET = ? AND ROUTE_ID IN (%S) AND (TIME_A BETWEEN ? AND ?) AND SERVICE_ID IN (%S) AND TIME_D >= ?";
+ + " WHERE SOURCE = ? AND TARGET = ? AND ROUTE_ID IN (%S) AND (TIME_A BETWEEN ? AND ?) AND SERVICE_ID IN (%S) AND TIME_D >= ?";
queryGetAllEdges = "SELECT ID, SOURCE, TARGET, LENGTH, EDGE_MODE, ROUTE_ID FROM " + configEdges;
@@ -742,6 +753,9 @@ public class Database {
if (length <= 0) {
return "";
}
+ if (length < PRECACHED_PLACEHOLDERS.length) {
+ return PRECACHED_PLACEHOLDERS[length];
+ }
final StringBuilder builder = new StringBuilder((2 * length) - 1);
builder.append("?");
--
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