org.h2.value.ValueStringIgnoreCase Maven / Gradle / Ivy
/*
* Copyright 2004-2014 H2 Group. Multiple-Licensed under the MPL 2.0,
* and the EPL 1.0 (http://h2database.com/html/license.html).
* Initial Developer: H2 Group
*/
package org.h2.value;
import org.h2.engine.SysProperties;
import org.h2.util.StringUtils;
/**
* Implementation of the VARCHAR_IGNORECASE data type.
*/
public class ValueStringIgnoreCase extends ValueString {
private static final ValueStringIgnoreCase EMPTY =
new ValueStringIgnoreCase("");
private int hash;
protected ValueStringIgnoreCase(String value) {
super(value);
}
@Override
public int getType() {
return Value.STRING_IGNORECASE;
}
@Override
protected int compareSecure(Value o, CompareMode mode) {
ValueStringIgnoreCase v = (ValueStringIgnoreCase) o;
return mode.compareString(value, v.value, true);
}
@Override
public boolean equals(Object other) {
return other instanceof ValueString
&& value.equalsIgnoreCase(((ValueString) other).value);
}
@Override
public int hashCode() {
if (hash == 0) {
// this is locale sensitive
hash = value.toUpperCase().hashCode();
}
return hash;
}
@Override
public String getSQL() {
return "CAST(" + StringUtils.quoteStringSQL(value) + " AS VARCHAR_IGNORECASE)";
}
/**
* Get or create a case insensitive string value for the given string.
* The value will have the same case as the passed string.
*
* @param s the string
* @return the value
*/
public static ValueStringIgnoreCase get(String s) {
if (s.length() == 0) {
return EMPTY;
}
ValueStringIgnoreCase obj = new ValueStringIgnoreCase(StringUtils.cache(s));
if (s.length() > SysProperties.OBJECT_CACHE_MAX_PER_ELEMENT_SIZE) {
return obj;
}
ValueStringIgnoreCase cache = (ValueStringIgnoreCase) Value.cache(obj);
// the cached object could have the wrong case
// (it would still be 'equal', but we don't like to store it)
if (cache.value.equals(s)) {
return cache;
}
return obj;
}
@Override
protected ValueString getNew(String s) {
return ValueStringIgnoreCase.get(s);
}
}