Java tutorial
/* * Copyright (C) 2012 The Android Open Source Project * * Licensed under the Eclipse Public License, Version 1.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.eclipse.org/org/documents/epl-v10.php * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.android.ide.eclipse.auidt.internal.wizards.templates; import static com.android.ide.eclipse.auidt.internal.wizards.templates.TemplateHandler.TEMPLATE_XML; import static com.android.sdklib.SdkConstants.FD_EXTRAS; import static com.android.sdklib.SdkConstants.FD_TEMPLATES; import static com.android.sdklib.SdkConstants.FD_TOOLS; import com.android.annotations.NonNull; import com.android.annotations.Nullable; import com.android.ide.eclipse.auidt.AdtPlugin; import com.android.ide.eclipse.auidt.internal.editors.layout.gle2.DomUtilities; import com.android.ide.eclipse.auidt.internal.preferences.AdtPrefs; import com.google.common.base.Charsets; import com.google.common.collect.Maps; import com.google.common.io.Files; import org.w3c.dom.Document; import java.io.File; import java.io.IOException; import java.util.ArrayList; import java.util.Collections; import java.util.Comparator; import java.util.List; import java.util.Map; /** Handles locating templates and providing template metadata */ class TemplateManager { TemplateManager() { } @Nullable public static File getTemplateRootFolder() { String location = AdtPrefs.getPrefs().getOsSdkFolder(); if (location != null) { //File folder = new File(location, FD_TOOLS + File.separator + FD_TEMPLATES); File folder = new File(AdtPlugin.getTemplateActivity()); if (folder.isDirectory()) { return folder; } } return null; } @Nullable public static File getExtraTemplateRootFolder() { String location = AdtPrefs.getPrefs().getOsSdkFolder(); if (location != null) { File folder = new File(location, FD_EXTRAS + File.separator + FD_TEMPLATES); if (folder.isDirectory()) { return folder; } } return null; } @Nullable public static File getTemplateLocation(@NonNull File root, @NonNull String relativePath) { File templateRoot = getTemplateRootFolder(); if (templateRoot != null) { String rootPath = root.getPath(); File templateFile = new File(templateRoot, rootPath.replace('/', File.separatorChar) + File.separator + relativePath.replace('/', File.separatorChar)); if (templateFile.exists()) { return templateFile; } } return null; } @Nullable public static File getTemplateLocation(@NonNull String relativePath) { File templateRoot = getTemplateRootFolder(); if (templateRoot != null) { File templateFile = new File(templateRoot, relativePath.replace('/', File.separatorChar)); if (templateFile.exists()) { return templateFile; } } return null; } /** * Returns all the templates with the given prefix * * @param folder the folder prefix * @return the available templates */ @NonNull List<File> getTemplates(@NonNull String folder) { List<File> templates = new ArrayList<File>(); Map<String, File> templateNames = Maps.newHashMap(); File root = getTemplateRootFolder(); if (root != null) { File[] files = new File(root, folder).listFiles(); if (files != null) { for (File file : files) { if (file.isDirectory()) { // Avoid .DS_Store etc templates.add(file); templateNames.put(file.getName(), file); } } } } // Add in templates from extras/ as well. root = getExtraTemplateRootFolder(); if (root != null) { File[] files = new File(root, folder).listFiles(); if (files != null) { for (File file : files) { if (file.isDirectory()) { File replaces = templateNames.get(file.getName()); if (replaces != null) { int compare = compareTemplates(replaces, file); if (compare > 0) { int index = templates.indexOf(replaces); if (index != -1) { templates.set(index, file); } else { templates.add(file); } } } else { templates.add(file); } } } } } // Sort by file name (not path as is File's default) if (templates.size() > 1) { Collections.sort(templates, new Comparator<File>() { @Override public int compare(File file1, File file2) { return file1.getName().compareTo(file2.getName()); } }); } return templates; } /** * Compare two files, and return the one with the HIGHEST revision, and if * the same, most recently modified */ private int compareTemplates(File file1, File file2) { TemplateMetadata template1 = getTemplate(file1); TemplateMetadata template2 = getTemplate(file2); if (template1 == null) { return 1; } else if (template2 == null) { return -1; } else { int delta = template2.getRevision() - template1.getRevision(); if (delta == 0) { delta = (int) (file2.lastModified() - file1.lastModified()); } return delta; } } /** Cache for {@link #getTemplate()} */ private Map<File, TemplateMetadata> mTemplateMap; @Nullable public TemplateMetadata getTemplate(File templateDir) { if (mTemplateMap != null) { TemplateMetadata metadata = mTemplateMap.get(templateDir); if (metadata != null) { return metadata; } } else { mTemplateMap = Maps.newHashMap(); } try { File templateFile = new File(templateDir, TEMPLATE_XML); if (templateFile.isFile()) { String xml = Files.toString(templateFile, Charsets.UTF_8); Document doc = DomUtilities.parseDocument(xml, true); if (doc != null && doc.getDocumentElement() != null) { TemplateMetadata metadata = new TemplateMetadata(doc); mTemplateMap.put(templateDir, metadata); return metadata; } } } catch (IOException e) { AdtPlugin.log(e, null); } return null; } }