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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.language.process;
/**
* An enumeration of token types.
*
* @author Mathias Mølster Lidal
*/
public enum TokenType {
UNKNOWN(0),
SPACE(1),
PUNCTUATION(2),
SYMBOL(3),
ALPHABETIC(4),
NUMERIC(5),
MARKER(255);
private final int value;
TokenType(int value) {
this.value = value;
}
/** Returns an int code for this type */
public int getValue() { return value; }
/**
* Marker for whether this type of token can be indexed for search.
* Note that a Token can be excluded from an index, even though the token type marks
* it as indexable.
*
* @see com.yahoo.language.process.Token#isIndexable()
* @return whether this type of token can be indexed
*/
public boolean isIndexable() {
switch (this) {
case ALPHABETIC: case NUMERIC: return true;
default: return false;
}
}
/** Translates this from the int code representation returned from {@link #getValue} */
public static TokenType valueOf(int value) {
for (TokenType type : values()) {
if (value == type.value) return type;
}
return UNKNOWN;
}
}
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