Application: gvSIG desktop

package org.gvsig.fmap.dal.feature.impl;

import java.util.ArrayList;

import java.util.Collection;

import java.util.Collections;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import org.apache.commons.collections4.queue.CircularFifoQueue;

import org.gvsig.fmap.dal.feature.FeatureAttributeDescriptor;

import org.gvsig.fmap.dal.feature.FeatureStore;

import org.gvsig.fmap.dal.feature.FeatureType;

/**

 *

 * @author jjdelcerro

 */

public class RecentUsedsAttributesImpl {

    private final Map<String,CircularFifoQueue<String>> recentsForStore;

    public RecentUsedsAttributesImpl() {

        this.recentsForStore = new HashMap<>();

    }

    public Collection<String> getNames(FeatureType featureType) {

        FeatureStore store = featureType.getStore();

        if( store == null ) {

            return Collections.EMPTY_LIST;

        }

        CircularFifoQueue<String> recents = this.recentsForStore.get(store.getFullName());

        if( recents==null ) {

            return Collections.EMPTY_LIST;

        }

        return recents;

    }

    public List<FeatureAttributeDescriptor> getAttributes(FeatureType featureType) {

        List<FeatureAttributeDescriptor> r = new ArrayList<>();

        for (String name : this.getNames(featureType)) {

            r.add(featureType.getAttributeDescriptor(name));

        }

        return r;

    }

    public void add(FeatureAttributeDescriptor attribute) {

        this.add(attribute.getFeatureType(), attribute.getName());

    }

    public void add(FeatureType featureType, FeatureAttributeDescriptor attribute) {

        this.add(featureType, attribute.getName());

    }

    public void add(FeatureType featureType, String name) {

        String storeFullName = featureType.getStore().getFullName();

        CircularFifoQueue<String> recents = this.recentsForStore.get(storeFullName);

        if( recents==null ) {

            recents = new CircularFifoQueue(this.getMaxSize());

            this.recentsForStore.put(storeFullName, recents);

        }

        recents.remove(name);

        recents.add(name);

    }

    public int getMaxSize() {

        return 6;

    }

}