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package org.melati.template; |
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import java.util.Hashtable; |
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import org.melati.poem.FieldAttributes; |
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import org.melati.util.MelatiBugMelatiException; |
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public final class ClassNameTempletLoader implements TempletLoader { |
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| 59 | 2 | private static ClassNameTempletLoader it = null; |
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| 62 | 2 | private static Hashtable<String,Template> templetForClassCache = new Hashtable<String,Template>(); |
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| 64 | 2 | private static final Integer FOUND = new Integer(1); |
| 65 | 2 | private static final Integer NOT_FOUND = new Integer(0); |
| 66 | 2 | private static Hashtable<String,Integer> lookedupTemplateNames = new Hashtable<String,Integer>(); |
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| 69 | 2 | private ClassNameTempletLoader() {} |
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public static ClassNameTempletLoader getInstance() { |
| 75 | 932 | if (it == null) |
| 76 | 2 | it = new ClassNameTempletLoader(); |
| 77 | 932 | return it; |
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} |
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protected static String templetsPath(TemplateEngine templateEngine, |
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MarkupLanguage markupLanguage) { |
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| 90 | 696 | return "org/melati/templets/" + |
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markupLanguage.getName() + "/"; |
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} |
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protected static String templetsTempletPath(TemplateEngine templateEngine, |
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MarkupLanguage markupLanguage, |
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String purpose, String name) { |
| 101 | 696 | if (purpose == null) |
| 102 | 654 | return |
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templetsPath(templateEngine, markupLanguage) + |
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name + |
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templateEngine.templateExtension(); |
| 106 | 42 | return |
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templetsPath(templateEngine, markupLanguage) + |
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purpose + "/" + |
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name + |
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templateEngine.templateExtension(); |
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} |
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protected static String classpathTempletPath(Class<?> clazz, TemplateEngine templateEngine) { |
| 114 | 474 | return clazz.getName().replace('.', '/') + templateEngine.templateExtension(); |
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} |
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public Template templet(TemplateEngine templateEngine, |
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MarkupLanguage markupLanguage, String purpose, |
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String name) throws NotFoundException { |
| 125 | 118 | return templateEngine.template(templetsTempletPath(templateEngine, markupLanguage, |
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purpose, name)); |
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} |
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public Template templet(TemplateEngine templateEngine, |
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MarkupLanguage markupLanguage, String name) |
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throws NotFoundException { |
| 138 | 118 | return templet(templateEngine, markupLanguage, null, name); |
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} |
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public Template templet(TemplateEngine templateEngine, |
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MarkupLanguage markupLanguage, String purpose, |
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Class<?> clazz) |
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throws TemplateEngineException { |
| 153 | 690 | Class<?> lookupClass = clazz; |
| 154 | 690 | Template templet = null; |
| 155 | 690 | Template fromCache = null; |
| 156 | 690 | String originalCacheKey = cacheKey(templateEngine, markupLanguage, purpose, lookupClass); |
| 157 | 690 | String lookupCacheKey = originalCacheKey; |
| 158 | 690 | String lookupPurpose = purpose; |
| 159 | |
while (true) { |
| 160 | 1136 | fromCache = (Template)templetForClassCache.get(lookupCacheKey); |
| 161 | 1136 | if (fromCache != null) { |
| 162 | 558 | templet = fromCache; |
| 163 | 558 | break; |
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} |
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| 170 | 578 | String templetPath = templetsTempletPath(templateEngine, markupLanguage, |
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lookupPurpose, lookupClass.getName()); |
| 172 | 578 | templet = getTemplate(templateEngine, templetPath); |
| 173 | 556 | if (templet != null) |
| 174 | 82 | break; |
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| 176 | 474 | templetPath = classpathTempletPath(lookupClass, templateEngine); |
| 177 | 474 | templet = getTemplate(templateEngine, templetPath); |
| 178 | 462 | if (templet != null) |
| 179 | 16 | break; |
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| 181 | 446 | if (lookupPurpose != null) |
| 182 | 30 | lookupPurpose = null; |
| 183 | |
else { |
| 184 | 416 | lookupClass = lookupClass.getSuperclass(); |
| 185 | 416 | lookupPurpose = purpose; |
| 186 | |
} |
| 187 | 446 | lookupCacheKey = cacheKey(templateEngine, markupLanguage, lookupPurpose, lookupClass); |
| 188 | 446 | } |
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| 192 | 656 | System.err.println(lookupCacheKey); |
| 193 | 656 | if (fromCache == null) |
| 194 | 98 | templetForClassCache.put(originalCacheKey, templet); |
| 195 | 656 | if (!lookupCacheKey.equals(originalCacheKey)) { |
| 196 | 196 | if (templetForClassCache.get(lookupCacheKey) == null) |
| 197 | 40 | templetForClassCache.put(lookupCacheKey, templet); |
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} |
| 199 | 656 | return templet; |
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} |
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private String cacheKey(TemplateEngine templateEngine, |
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MarkupLanguage markupLanguage, |
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String purpose, |
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Class<?> lookupClass) { |
| 206 | 1136 | return purpose == null ? cacheKey(templateEngine, markupLanguage, lookupClass) |
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: lookupClass + "/" + |
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purpose + "/" + |
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markupLanguage + "/" + |
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templateEngine.getName(); |
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} |
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private String cacheKey(TemplateEngine templateEngine, |
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MarkupLanguage markupLanguage, |
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Class<?> lookupClass) { |
| 216 | 1086 | return lookupClass + |
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"/" + markupLanguage + |
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"/" + templateEngine.getName(); |
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} |
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private Template getTemplate(TemplateEngine templateEngine, String templetPath) { |
| 222 | 1052 | Template templet = null; |
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try { |
| 224 | 1052 | Object triedAlready = lookedupTemplateNames.get(templetPath); |
| 225 | 1052 | if (triedAlready != NOT_FOUND) { |
| 226 | 584 | templet = templateEngine.template(templetPath); |
| 227 | 98 | lookedupTemplateNames.put(templetPath, FOUND); |
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} |
| 229 | 452 | } catch (NotFoundException e) { |
| 230 | 452 | lookedupTemplateNames.put(templetPath, NOT_FOUND); |
| 231 | 566 | } |
| 232 | 1018 | return templet; |
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} |
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public Template templet(TemplateEngine templateEngine, |
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MarkupLanguage markupLanguage, Class<?> clazz) { |
| 243 | 668 | return templet(templateEngine, markupLanguage, null, clazz); |
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} |
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public Template templet(TemplateEngine templateEngine, |
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MarkupLanguage markupLanguage, |
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FieldAttributes attributes) { |
| 256 | 460 | if (attributes.getRenderInfo() != null) { |
| 257 | 44 | String templetName = attributes.getType().getClass().getName() |
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+ "-" |
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+ attributes.getRenderInfo(); |
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try { |
| 261 | 44 | return templet(templateEngine, markupLanguage, |
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templetName); |
| 263 | 4 | } catch (NotFoundException e) { |
| 264 | 4 | throw new MelatiBugMelatiException( |
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"Templet " + templetName + " not found", e); |
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} |
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} else { |
| 268 | 416 | return templet(templateEngine, markupLanguage, |
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attributes.getType().getClass()); |
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} |
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} |
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} |
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