001 /*
002 * Copyright (C) 2012 eXo Platform SAS.
003 *
004 * This is free software; you can redistribute it and/or modify it
005 * under the terms of the GNU Lesser General Public License as
006 * published by the Free Software Foundation; either version 2.1 of
007 * the License, or (at your option) any later version.
008 *
009 * This software is distributed in the hope that it will be useful,
010 * but WITHOUT ANY WARRANTY; without even the implied warranty of
011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
012 * Lesser General Public License for more details.
013 *
014 * You should have received a copy of the GNU Lesser General Public
015 * License along with this software; if not, write to the Free
016 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
017 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
018 */
019
020 package org.crsh.cli.impl.lang;
021
022 import org.crsh.cli.descriptor.CommandDescriptor;
023 import org.crsh.cli.descriptor.Description;
024 import org.crsh.cli.impl.descriptor.IntrospectionException;
025 import org.crsh.cli.descriptor.OptionDescriptor;
026 import org.crsh.cli.descriptor.ParameterDescriptor;
027 import org.crsh.cli.impl.SyntaxException;
028 import org.crsh.cli.impl.invocation.InvocationException;
029 import org.crsh.cli.impl.invocation.InvocationMatch;
030
031 import java.lang.reflect.Type;
032 import java.util.HashSet;
033 import java.util.Map;
034 import java.util.Set;
035
036 class ClassDescriptor<T> extends ObjectCommandDescriptor<T> {
037
038 /** . */
039 private final Class<T> type;
040
041 /** . */
042 private final Map<String, MethodDescriptor<T>> methods;
043
044 ClassDescriptor(Class<T> type, String name, Map<String, MethodDescriptor<T>> methods, Description info) throws IntrospectionException {
045 super(name, info);
046
047 //
048 this.methods = methods;
049 this.type = type;
050 }
051
052 @Override
053 protected void addParameter(ParameterDescriptor parameter) throws IntrospectionException {
054
055 // Check we can add the option
056 if (parameter instanceof OptionDescriptor) {
057 OptionDescriptor option = (OptionDescriptor)parameter;
058 Set<String> blah = new HashSet<String>();
059 for (String optionName : option.getNames()) {
060 blah.add((optionName.length() == 1 ? "-" : "--") + optionName);
061 }
062 for (MethodDescriptor<T> method : methods.values()) {
063 Set<String> diff = new HashSet<String>(method.getOptionNames());
064 diff.retainAll(blah);
065 if (diff.size() > 0) {
066 throw new IntrospectionException("Cannot add method " + method.getName() + " because it has common "
067 + " options with its class: " + diff);
068 }
069 }
070 }
071
072 //
073 super.addParameter(parameter);
074 }
075
076 @Override
077 public ObjectCommandInvoker<T, ?> getInvoker(final InvocationMatch<Instance<T>> match) {
078
079 if (Runnable.class.isAssignableFrom(type)) {
080 return new ObjectCommandInvoker<T, Void>(match) {
081 @Override
082 public Class<Void> getReturnType() {
083 return Void.class;
084 }
085 @Override
086 public Type getGenericReturnType() {
087 return Void.class;
088 }
089 @Override
090 public Class<?>[] getParameterTypes() {
091 return new Class<?>[0];
092 }
093 @Override
094 public Type[] getGenericParameterTypes() {
095 return new Type[0];
096 }
097 public Void invoke(Instance<T> commandInstance) throws InvocationException, SyntaxException {
098 T command;
099 try {
100 command = commandInstance.get();
101 }
102 catch (Exception e) {
103 throw new InvocationException(e);
104 }
105 MethodDescriptor.bind(match, getParameters(), command, Util.EMPTY_ARGS);
106 Runnable runnable = Runnable.class.cast(command);
107 try {
108 runnable.run();
109 }
110 catch (Exception e) {
111 throw new InvocationException(e);
112 }
113 return null;
114 }
115 };
116 } else {
117 return null;
118 }
119 }
120
121 @Override
122 public CommandDescriptor<Instance<T>> getOwner() {
123 return null;
124 }
125
126 @Override
127 public Map<String, ? extends MethodDescriptor<T>> getSubordinates() {
128 return methods;
129 }
130
131 }