Code optimization suggestions

[noobyu6]

Required Information

• AEM Version, including Service Packs, Cumulative Fix Packs, etc: _______
• ACS AEM Commons Version: master
• Reproducible on Latest? yes/no

Hi,

I find that the private field resourceIgnores at Line 53 in the file 'acs-aem-commons/bundle/src/main/java/com/adobe/acs/commons/version/impl/EvolutionAnalyserImpl.java' on the master branch is only assigned and used in the method activate. Therefore, this field can be removed from the class, and become a local variable in the method activate. This transformation will normally reduce memory usage and improve readability of your code.

private String[] resourceIgnores; // line 53 this field can be replaced by local variable

protected void activate(final Map<String, String> config) {
  propertyIgnores = PropertiesUtil.toStringArray(config.get(PROPERTY_IGNORES), new String[] { "" });
  // String[] resourceIgnores = PropertiesUtil.toStringArray(config.get(RESOURCE_IGNORES), new String[] { "" });
  resourceIgnores = PropertiesUtil.toStringArray(config.get(RESOURCE_IGNORES), new String[] { "" });
  evolutionConfig = new EvolutionConfig(propertyIgnores, resourceIgnores);
  log.debug("Ignored properties: {}", (Object[]) propertyIgnores);
  log.debug("Ignored resources: {}", (Object[]) resourceIgnores);
    }

Besides, there are other fields like this.I sorted them out and put them in the table below.

Location	Field
com.adobe.acs.commons.version.impl.EvolutionAnalyserImpl	propertyIgnores
com.adobe.acs.commons.version.impl.EvolutionContextImpl	history
com.adobe.acs.commons.version.impl.EvolutionContextImpl	resolver
com.adobe.acs.commons.version.impl.EvolutionContextImpl	versionManager
com.adobe.acs.commons.wcm.impl.AemEnvironmentIndicatorFilter	color
com.adobe.acs.commons.wcm.impl.AemEnvironmentIndicatorFilter	cssOverride
com.adobe.acs.commons.fam.Failure	error
com.adobe.acs.commons.fam.Failure	stackTrace
com.adobe.acs.commons.errorpagehandler.impl.ErrorPageHandlerImpl	fallbackErrorName
com.adobe.acs.commons.httpcache.config.impl.HttpCacheConfigImpl	cacheInvalidationPathPatterns
com.adobe.acs.commons.httpcache.config.impl.HttpCacheConfigImpl	blacklistedRequestUriPatterns
com.adobe.acs.commons.httpcache.store.mem.impl.MemHttpCacheStoreImpl	maxSizeInMb

In addition, the private field resource at Line 42 in the file 'acs-aem-commons/bundle/src/main/java/com/adobe/acs/commons/version/impl/EvolutionContextImpl.java ' on the master branch is only assigned and used in the method EvolutionContextImpl. Therefore, this field can be removed from the class, and become a local variable in the method EvolutionContextImpl. Besides, for method populateEvolutions, the field resource can be converted to an input parameter.This transformation will normally reduce memory usage and improve readability of your code.I will be happy if this transformation is helpful.

private Resource resource = null;// line 42 this field can be replaced by local variable

public EvolutionContextImpl(Resource resource, EvolutionConfig config) {
  // Resource resource = resource.isResourceType("cq:Page") ? resource.getChild("jcr:content") : resource;
	this.resource = resource.isResourceType("cq:Page") ? resource.getChild("jcr:content") : resource;
	this.config = config;
  // populateEvolutions(resource);
	populateEvolutions();
}
private void populateEvolutions(Resource resource) {
	try {
			this.resolver = resource.getResourceResolver();
			this.versionManager = resolver.adaptTo(Session.class).getWorkspace().getVersionManager();
			this.history = versionManager.getVersionHistory(resource.getPath());
			Iterator<Version> iter = history.getAllVersions();
			while (iter.hasNext()) {
      		Version next = iter.next();
          String versionPath = next.getFrozenNode().getPath();
          Resource versionResource = resolver.resolve(versionPath);
          versions.add(new EvolutionImpl(next, versionResource, config));
          log.debug("Version={} added to EvolutionItem", next.getName());
      }
     } catch (UnsupportedRepositoryOperationException e1) {
            log.warn("Could not find version for resource={}", resource.getPath());
      } catch (Exception e) {
          log.error("Could not find versions", e);
      }
      evolutionItems = new ArrayList<>(versions);
  		// evolutionItems.add(new CurrentEvolutionImpl(resource, this.config));
			evolutionItems.add(new CurrentEvolutionImpl(this.resource, this.config));
}

Besides, there are other fields like this.I sorted them out and put them in the table below.

Location	Field
com.adobe.acs.commons.version.impl.EvolutionContextImpl	config
com.adobe.acs.commons.version.impl.CurrentEvolutionImpl	config
com.adobe.acs.commons.reports.models.ReferencesModel	resource
com.adobe.acs.commons.util.impl.ComponentDisabler	disabledComponents
com.adobe.acs.commons.twitter.impl.TwitterAdapterFactory	httpProxyHost
com.adobe.acs.commons.twitter.impl.TwitterAdapterFactory	httpProxyPort
com.adobe.acs.commons.twitter.impl.TwitterAdapterFactory	useSsl
com.adobe.acs.commons.reports.models.ReportRunner	page
com.adobe.acs.commons.wcm.comparisons.impl.lines.LinesGenerator	leftSpacer
com.adobe.acs.commons.wcm.comparisons.impl.lines.LinesGenerator	left
com.adobe.acs.commons.wcm.comparisons.impl.lines.LinesGenerator	rightSpacer
com.adobe.acs.commons.wcm.comparisons.impl.lines.LinesGenerator	right

Expected Behavior

Some fields can be replaced by local variable.

Actual Behavior

Use fields as local variables.

Steps to Reproduce

See attachment for details
acs-aem-commons.md

Links

See attachment for details