/*
* Copyright 2004-2023 H2 Group. Multiple-Licensed under the MPL 2.0,
* and the EPL 1.0 (https://h2database.com/html/license.html).
* Initial Developer: H2 Group
*/
package org.h2.value;
import org.h2.engine.CastDataProvider;
import org.h2.engine.SysProperties;
import org.h2.util.StringUtils;
/**
* Implementation of the CHARACTER VARYING data type.
*/
public final class ValueVarchar extends ValueStringBase {
/**
* Empty string. Should not be used in places where empty string can be
* treated as {@code NULL} depending on database mode.
*/
public static final ValueVarchar EMPTY = new ValueVarchar("");
private ValueVarchar(String value) {
super(value);
}
@Override
public StringBuilder getSQL(StringBuilder builder, int sqlFlags) {
return StringUtils.quoteStringSQL(builder, value);
}
@Override
public int getValueType() {
return VARCHAR;
}
/**
* Get or create a VARCHAR value for the given string.
*
* @param s the string
* @return the value
*/
public static Value get(String s) {
return get(s, null);
}
/**
* Get or create a VARCHAR value for the given string.
*
* @param s the string
* @param provider the cast information provider, or {@code null}
* @return the value
*/
public static Value get(String s, CastDataProvider provider) {
if (s.isEmpty()) {
return provider != null && provider.getMode().treatEmptyStringsAsNull ? ValueNull.INSTANCE : EMPTY;
}
ValueVarchar obj = new ValueVarchar(StringUtils.cache(s));
if (s.length() > SysProperties.OBJECT_CACHE_MAX_PER_ELEMENT_SIZE) {
return obj;
}
return Value.cache(obj);
// this saves memory, but is really slow
// return new ValueString(s.intern());
}
}