PluginRuleSet.java

package hudson.plugins.cigame.rules.plugins;

import java.util.Collection;

import hudson.model.Hudson;
import hudson.plugins.cigame.model.Rule;
import hudson.plugins.cigame.model.RuleSet;

/**
 * Rule set for plugins rules that will check if the plugin is installed or not.
 */
public class PluginRuleSet extends RuleSet {

    private String pluginName;
    private transient boolean isInitalized = false;

    /**
     * Construct a rule set for a plugin.
     * 
     * @param pluginName the name of the plugin as it is known by Hudson.
     * @param name the text name of the rule set, as it will be displayed.
     */
    public PluginRuleSet(String pluginName, String name) {
        super(name);
        this.pluginName = pluginName;
    }

    /**
     * Returns if the plugin is installed or not.
     * 
     * @return true, if the plugin is installed; false otherwise.
     */
    @Override
    public boolean isAvailable() {
        return (Hudson.getInstance().getPlugin(pluginName) != null);
    }

    /**
     * Late loading of the rules for this rule set.
     */
    protected void loadRules() {
        isInitalized = true;
    }

    @Override
    public Collection<Rule> getRules() {
        if (!isInitalized) {
            loadRules();
            isInitalized = true;
        }
        return super.getRules();
    }
}