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| ****************************************************************/ |
| |
| package org.apache.james.ai.classic; |
| |
| /** |
| * Inner class for managing Token Probability Strengths during the |
| * computeSpamProbability phase. |
| * |
| * By probability <i>strength</i> we mean the absolute distance of a |
| * probability from the middle value 0.5. |
| * |
| * It implements Comparable so that it's sorting is automatic. |
| */ |
| class TokenProbabilityStrength implements Comparable<TokenProbabilityStrength> { |
| /** |
| * Message token. |
| */ |
| String token = null; |
| |
| /** |
| * Token's computed probability strength. |
| */ |
| double strength = Math.abs(0.5 - BayesianAnalyzer.DEFAULT_TOKEN_PROBABILITY); |
| |
| /** |
| * Force the natural sort order for this object to be high-to-low. |
| * |
| * @param anotherTokenProbabilityStrength |
| * A TokenProbabilityStrength instance to compare this |
| * instance with. |
| * |
| * @return The result of the comparison (before, equal, after). |
| */ |
| @Override |
| public final int compareTo(TokenProbabilityStrength anotherTokenProbabilityStrength) { |
| int result = (int) ((anotherTokenProbabilityStrength.strength - strength) * 1000000); |
| if (result == 0) { |
| return this.token.compareTo(anotherTokenProbabilityStrength.token); |
| } else { |
| return result; |
| } |
| } |
| |
| /** |
| * Simple toString () implementation mostly for debugging purposes. |
| * |
| * @return String representation of this object. |
| */ |
| public String toString() { |
| StringBuilder sb = new StringBuilder(30); |
| |
| sb.append(token).append("=").append(strength); |
| |
| return sb.toString(); |
| } |
| } |