?? valuestringignorecase.java
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/*
* Copyright 2004-2008 H2 Group. Licensed under the H2 License, Version 1.0
* (http://h2database.com/html/license.html).
* Initial Developer: H2 Group
*/
package org.h2.value;
import org.h2.constant.SysProperties;
import org.h2.util.MathUtils;
import org.h2.util.StringCache;
import org.h2.util.StringUtils;
/**
* Implementation of the VARCHAR_IGNORECASE data type.
*/
public class ValueStringIgnoreCase extends ValueStringBase {
private static final ValueStringIgnoreCase EMPTY = new ValueStringIgnoreCase("");
private int hash;
protected ValueStringIgnoreCase(String value) {
super(value);
}
public int getType() {
return Value.STRING_IGNORECASE;
}
protected int compareSecure(Value o, CompareMode mode) {
ValueStringIgnoreCase v = (ValueStringIgnoreCase) o;
return mode.compareString(value, v.value, true);
}
public boolean equals(Object other) {
return other instanceof ValueStringBase && value.equalsIgnoreCase(((ValueStringBase) other).value);
}
public int hashCode() {
if (hash == 0) {
// this is locale sensitive
hash = value.toUpperCase().hashCode();
}
return hash;
}
public String getSQL() {
return "CAST(" + StringUtils.quoteStringSQL(value) + " AS VARCHAR_IGNORECASE)";
}
public static ValueStringIgnoreCase get(String s) {
if (s.length() == 0) {
return EMPTY;
}
ValueStringIgnoreCase obj = new ValueStringIgnoreCase(StringCache.get(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;
} else {
return obj;
}
}
public Value convertPrecision(long precision) {
if (precision == 0 || value.length() <= precision) {
return this;
}
int p = MathUtils.convertLongToInt(precision);
return ValueStringIgnoreCase.get(value.substring(0, p));
}
}
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