org.grails.scaffolding.registry.DomainRendererRegistry.groovy Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of fields Show documentation

Fields integration for Grails

The newest version!

package org.grails.scaffolding.registry

import org.grails.scaffolding.model.property.DomainProperty
import groovy.transform.CompileStatic

import java.util.concurrent.atomic.AtomicInteger

/**
 * A registry of domain property renderers sorted by priority and order of addition
 *
 * @author James Kleeh
 */
@CompileStatic
abstract class DomainRendererRegistry {

    protected SortedSet domainRegistryEntries = new TreeSet();

    protected final AtomicInteger RENDERER_SEQUENCE = new AtomicInteger(0);

    void registerDomainRenderer(T domainRenderer, Integer priority) {
        domainRegistryEntries.add(new Entry(domainRenderer, priority))
    }

    public SortedSet getDomainRegistryEntries() {
        this.domainRegistryEntries
    }

    T get(DomainProperty domainProperty) {
        for (Entry entry : domainRegistryEntries) {
            if (entry.renderer.supports(domainProperty)) {
                return entry.renderer
            }
        }
        null
    }

    private class Entry implements Comparable {
        protected final T renderer
        private final int priority;
        private final int seq;

        Entry(T renderer, int priority) {
            this.renderer = renderer
            this.priority = priority
            seq = RENDERER_SEQUENCE.incrementAndGet()
        }

        public int compareTo(Entry entry) {
            return priority == entry.priority ? entry.seq - seq : entry.priority - priority;
        }
    }
}