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hibernate-orm
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SimpleProjection should reuse commonly generated Strings

This commit is contained in:
Sanne Grinovero 2012-02-14 18:22:50 +00:00
parent f9ab0eb6ae
commit 10df95bbcd
1 changed files with 26 additions and 2 deletions
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28
hibernate-core/src/main/java/org/hibernate/criterion/SimpleProjection.java
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@ -34,10 +34,34 @@ import org.hibernate.type.Type;
*/
public abstract class SimpleProjection implements EnhancedProjection {
private static final int NUM_REUSABLE_ALIASES = 40;
private static final String[] reusableAliases = initializeReusableAliases();
public Projection as(String alias) {
return Projections.alias(this, alias);
}
private static String[] initializeReusableAliases() {
String[] aliases = new String[NUM_REUSABLE_ALIASES];
for ( int i = 0; i < NUM_REUSABLE_ALIASES; i++ ) {
aliases[i] = aliasForLocation( i );
}
return aliases;
}
private static String aliasForLocation(final int loc) {
return "y" + loc + "_";
}
private static String getAliasForLocation(final int loc) {
if ( loc >= NUM_REUSABLE_ALIASES ) {
return aliasForLocation( loc );
}
else {
return reusableAliases[loc];
}
}
public String[] getColumnAliases(String alias, int loc) {
return null;
}
@ -52,7 +76,7 @@ public abstract class SimpleProjection implements EnhancedProjection {
}
public String[] getColumnAliases(int loc) {
return new String[] { "y" + loc + "_" };
return new String[] { getAliasForLocation( loc ) };
}
public int getColumnCount(Criteria criteria, CriteriaQuery criteriaQuery) {
@ -68,7 +92,7 @@ public abstract class SimpleProjection implements EnhancedProjection {
int numColumns = getColumnCount( criteria, criteriaQuery );
String[] aliases = new String[ numColumns ];
for (int i = 0; i < numColumns; i++) {
aliases[i] = "y" + loc + "_";
aliases[i] = getAliasForLocation( loc );
loc++;
}
return aliases;