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[jOOQ/jOOQ#12151] Add a cache for Tools.fieldName() and fieldNameString()

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This commit is contained in:
Lukas Eder 2021-07-12 09:39:04 +02:00
parent 14ff6ce4a2
commit 38e16b36a9
1 changed files with 16 additions and 2 deletions
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18
jOOQ/src/main/java/org/jooq/impl/Tools.java
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@ -225,6 +225,7 @@ import java.util.function.Predicate;
import java.util.function.Supplier;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.stream.IntStream;
import java.util.stream.Stream;
import javax.persistence.Column;
@ -1278,6 +1279,15 @@ final class Tools {
// XXX: General utility methods
// ------------------------------------------------------------------------
private static final int FIELD_NAME_CACHE_SIZE = 128;
private static final String[] FIELD_NAME_STRINGS;
private static final Name[] FIELD_NAMES;
static {
FIELD_NAME_STRINGS = IntStream.range(0, FIELD_NAME_CACHE_SIZE).mapToObj(Tools::fieldNameString0).toArray(String[]::new);
FIELD_NAMES = IntStream.range(0, FIELD_NAME_CACHE_SIZE).mapToObj(i -> name(FIELD_NAME_STRINGS[i])).toArray(Name[]::new);
}
static final <T> SortField<T> sortField(OrderField<T> field) {
if (field instanceof SortField)
return (SortField<T>) field;
@ -1298,12 +1308,16 @@ final class Tools {
return Tools.map(fields, (OrderField<?> o) -> sortField(o));
}
static final String fieldNameString(int index) {
private static final String fieldNameString0(int index) {
return "v" + index;
}
static final String fieldNameString(int index) {
return index < FIELD_NAME_CACHE_SIZE ? FIELD_NAME_STRINGS[index] : fieldNameString0(index);
}
static final Name fieldName(int index) {
return name(fieldNameString(index));
return index < FIELD_NAME_CACHE_SIZE ? FIELD_NAMES[index] : name(fieldNameString0(index));
}
static final Name[] fieldNames(int length) {