Application: gvSIG desktop » gvSIG projections

package org.gvsig.proj.swing.impl.tree;

import java.util.List;

import javax.swing.tree.TreeNode;

public abstract class DirectGroupLoader 

                implements GroupLoader {

        protected LoadedGroup caller;

        private boolean cancelled = false;

        public DirectGroupLoader(LoadedGroup caller) {

                this.caller = caller;

        }

        @Override

        public void execute() {

                this.cancelled = false;

                this.caller.clear();

                List<TreeNode> result = this.doExecute();

                if (cancelled) {

                        this.caller.cancelled();

                }

                else {

                        this.caller.loaded(result);

                }

        }

        protected abstract List<TreeNode> doExecute();

        @Override

        public void cancel() {

                cancelled = true;

        }

        @Override

        public boolean isCancelled() {

                return cancelled;

        }

        @Override

        public TreeNode createLoadingNode() {

                return null;

        }

}