    001package org.apache.tapestry5.internal.services.assets;
    002
    003import java.util.Map;
    004
    005import org.apache.tapestry5.services.assets.CompressionAnalyzer;
    006
    007public class CompressionAnalyzerImpl implements CompressionAnalyzer
    008{
    009    private final Map<String, Boolean> configuration;
    010
    011    public CompressionAnalyzerImpl(Map<String, Boolean> configuration)
    012    {
    013        this.configuration = configuration;
    014    }
    015
    016    public boolean isCompressable(String contentType)
    017    {
    018        if (contentType == null) {
    019            throw new IllegalStateException("Content type provided to CompressionAnalyzer is null, which is not allowed.");
    020        }
    021
    022        int x = contentType.indexOf(';');
    023
    024        String key = x < 0 ? contentType : contentType.substring(0, x);
    025
    026        Boolean result = configuration.get(key);
    027
    028        if (result != null) {
    029            return result;
    030        }
    031
    032        // Now look for a wild card.
    033
    034        x = contentType.indexOf('/');
    035
    036        String wildKey = contentType.substring(0, x) + "/*";
    037
    038        result = configuration.get(wildKey);
    039
    040        return result == null ? true : result;
    041    }
    042}