Application: gvSIG desktop

package org.gvsig.tools.swing.icontheme.impl;

import java.io.File;

import java.io.InputStream;

import java.net.MalformedURLException;

import java.net.URI;

import java.net.URISyntaxException;

import java.net.URL;

import java.util.Enumeration;

import java.util.HashMap;

import java.util.zip.ZipEntry;

import java.util.zip.ZipFile;

import org.gvsig.installer.lib.api.InstallerLocator;

import org.gvsig.installer.lib.api.InstallerManager;

import org.gvsig.installer.lib.api.PackageInfo;

import org.gvsig.tools.swing.icontheme.IconTheme;

/**

 * Extends BaseIconTheme to add support for themes stored in zip files.

 * 

 * TODO: This class is under construction.

 */

public class IconThemeZip extends BaseIconTheme{

        protected File resource = null; 

        protected PackageInfo packageInfo = null;

        public IconThemeZip(IconTheme def) {

                super(def);

        }

        public void load(Object resource) {

                if( !(resource instanceof File) ) {

                        throw new IllegalArgumentException();

                }

                File res = (File) resource;

                if( !res.isDirectory() ) {

                        throw new IllegalArgumentException();

                }

                this.resource = res;

                this.iconList = null;

                this.loadPackageInfo();

                this.setName(this.packageInfo .getName());

                this.setDescription(this.packageInfo.getDescription());

        }

        private void loadPackageInfo() {

                InstallerManager manager = InstallerLocator.getInstallerManager();

                ZipFile zipFile = null;

                try {

                        zipFile = new ZipFile(resource);

                        InputStream pkgstream = zipFile.getInputStream( zipFile.getEntry("packages.zip") );

                        this.packageInfo = manager.createPackageInfo(pkgstream);

                } catch (Exception e) {

                        throw new IllegalArgumentException(e);

                }

        }

        protected void deferredLoad() {

                if (this.iconList != null) {

                        return;

                }

                iconList = new HashMap<String, IconTheme.Icon>();

                ZipFile zipFile = null;

                try {

                        zipFile = new ZipFile(resource);

                } catch (Exception e) {

                        throw new IllegalArgumentException();

                }

                Enumeration<?> entries = zipFile.entries();

                while (entries.hasMoreElements()) {

                        ZipEntry entry = (ZipEntry) entries.nextElement();

                        if (!entry.isDirectory()) {

                                try {

                                        if (isImage(entry.getName())) {

                                                String name = getNameOfEntry(entry);

                                                String group = getGroupOfEntry(entry);

                                                URL resource = getURLOfEntry(this.resource, entry);

                                                this.register(null, group, name, null, resource);

                                        }

                                } catch (Exception e) {

                                        logger.info("Can't register icon. Entry = " +entry.toString(), e);

                                }

                        }

                }

        }

        private URL getURLOfEntry(File zip, ZipEntry entry) throws MalformedURLException, URISyntaxException {

                String s = "jar:" + zip.toString() + "!" + entry.getName();

                return new URI(s).toURL();

        }

        private String getGroupOfEntry(ZipEntry entry) {

                // FIXME:

                return "";

        }

        private String getNameOfEntry(ZipEntry entry) {

                // FIXME: 

                return entry.getName();

        }

        private boolean isImage(String fileName) {

                String extension = "";

                int pointPos = fileName.lastIndexOf(".");

                if (pointPos>0 && pointPos < (fileName.length()-1) )

                        extension = fileName.substring(pointPos+1).toLowerCase();

                if ( extension.equals("jpg") || extension.equals("jpeg")

                                || extension.equals("png")

                                || extension.equals("gif"))

                        return true;

                else

                        return false;

        }

}