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shell/src/main/java/org/jboss/forge/shell/command/DidYouMeanObserver.java
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| /* | ||
| * Copyright 2012 Red Hat, Inc. and/or its affiliates. | ||
| * | ||
| * Licensed under the Eclipse Public License version 1.0, available at | ||
| * http://www.eclipse.org/legal/epl-v10.html | ||
| */ | ||
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| package org.jboss.forge.shell.command; | ||
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| import java.util.Set; | ||
| import java.util.TreeSet; | ||
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| import javax.enterprise.event.Observes; | ||
| import javax.inject.Inject; | ||
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| import org.jboss.forge.parser.java.util.Strings; | ||
| import org.jboss.forge.shell.Shell; | ||
| import org.jboss.forge.shell.ShellColor; | ||
| import org.jboss.forge.shell.ShellMessages; | ||
| import org.jboss.forge.shell.events.CommandMissing; | ||
| import org.jboss.forge.shell.exceptions.NoSuchCommandException; | ||
| import org.jboss.forge.shell.plugins.builtin.AliasRegistry; | ||
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| public class DidYouMeanObserver | ||
| { | ||
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| private static final int LETTERS_NEEDED_TO_BE_REPLACED = 2; | ||
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| @Inject | ||
| private PluginRegistry pluginRegistry; | ||
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| @Inject | ||
| private AliasRegistry aliasRegistry; | ||
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| /** | ||
| * Did you mean ? | ||
| */ | ||
| public void suggestMissingPlugin(@Observes CommandMissing commandMissing, Shell shell) | ||
| { | ||
| String pluginName = commandMissing.getOriginalStatement().split(" ")[0]; | ||
| // Find similar plugins | ||
| Set<String> similarPlugins = new TreeSet<String>(String.CASE_INSENSITIVE_ORDER); | ||
| for (String plugin : pluginRegistry.getPlugins().keySet()) | ||
| { | ||
| if (Strings.getLevenshteinDistance(pluginName, plugin) < LETTERS_NEEDED_TO_BE_REPLACED) | ||
| { | ||
| similarPlugins.add(plugin); | ||
| } | ||
| } | ||
| for (String alias : aliasRegistry.getAliases().keySet()) | ||
| { | ||
| if (Strings.getLevenshteinDistance(pluginName, alias) < LETTERS_NEEDED_TO_BE_REPLACED) | ||
| { | ||
| similarPlugins.add(alias); | ||
| } | ||
| } | ||
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| if (similarPlugins.isEmpty()) | ||
| { | ||
| throw new NoSuchCommandException(null, "No such command: " | ||
| + commandMissing.getOriginalStatement()); | ||
| } | ||
| else | ||
| { | ||
| ShellMessages.error(shell, "No such command: " + pluginName); | ||
| shell.println("Did you mean any of these ?"); | ||
| for (String plugin : similarPlugins) | ||
| { | ||
| shell.println(ShellColor.BOLD, "\t" + plugin); | ||
| } | ||
| } | ||
| } | ||
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| } |
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33
shell/src/test/java/org/jboss/forge/shell/command/DidYouMeanObserverTest.java
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| package org.jboss.forge.shell.command; | ||
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| import static org.junit.Assert.assertTrue; | ||
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| import org.jboss.forge.shell.exceptions.NoSuchCommandException; | ||
| import org.jboss.forge.test.AbstractShellTest; | ||
| import org.junit.Test; | ||
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| public class DidYouMeanObserverTest extends AbstractShellTest | ||
| { | ||
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| @Test(expected = NoSuchCommandException.class) | ||
| public void testNoSuggestionsSuggestMissingPlugin() throws Exception | ||
| { | ||
| getShell().execute("aninvalidcommand"); | ||
| } | ||
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| @Test | ||
| public void testSuggestInvalidCommand() throws Exception | ||
| { | ||
| getShell().execute("l"); | ||
| assertTrue(getOutput().contains("Did you mean any of these ?\n\tls")); | ||
| } | ||
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| @Test | ||
| public void testSuggestInvalidAliasedCommand() throws Exception | ||
| { | ||
| getShell().execute("alias \"ll=ls -l\""); | ||
| getShell().execute("l"); | ||
| assertTrue(getOutput().contains("Did you mean any of these ?\n\tll\n\tls")); | ||
| } | ||
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| } |