CodeLanguage.java

package org.codefaces.ui.internal.codeLanguages;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.regex.Pattern;

public class CodeLanguage {
	public static final CodeLanguage PLAIN_TEXT = new CodeLanguage(
			"no-highlight", "no-highlight", "/html/javascripts/highlight/languages/no-highlight.js", new String[0]);

	private static final String FILE_EXTENSION_PATTERN = "*.";

	private static final String FILE_EXTENSION_REGEXP = ".*.";

	private final List<Pattern> filePatternsRegexps = new ArrayList<Pattern>();

	private final String id;

	private final String name;

	private final String resource;

	CodeLanguage(String id, String name, String resource,
			String... filePatterns) {
		this.id = id;
		this.name = name;
		this.resource = resource;

		Set<String> uniqueFilePatterns = new HashSet<String>(Arrays
				.asList(filePatterns));
		for (String filePattern : uniqueFilePatterns) {
			Pattern filePatternRegexp = createFileExtensionRegexp(filePattern);
			filePatternsRegexps.add(filePatternRegexp);
		}
	}

	private Pattern createFileExtensionRegexp(String filePattern) {
		if (filePattern.startsWith(FILE_EXTENSION_PATTERN)) {
			String extension = filePattern.substring(FILE_EXTENSION_PATTERN
					.length());
			return Pattern.compile(FILE_EXTENSION_REGEXP + extension);
		}

		return Pattern.compile(filePattern, Pattern.CASE_INSENSITIVE);
	}

	Collection<Pattern> getFilePatternsRegexps() {
		return filePatternsRegexps;
	}

	public String getName() {
		return name;
	}

	public String getResource() {
		return resource;
	}

	public String getId() {
		return id;
	}

	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result + ((id == null) ? 0 : id.hashCode());
		return result;
	}

	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		CodeLanguage other = (CodeLanguage) obj;
		if (id == null) {
			if (other.id != null)
				return false;
		} else if (!id.equals(other.id))
			return false;
		return true;
	}

	public boolean matchesFileName(String fileName) {
		for (Pattern filePatternRegexp : getFilePatternsRegexps()) {
			if (filePatternRegexp.matcher(fileName).matches()) {
				return true;
			}
		}

		return false;
	}
}