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.lang.groovy.command;
021
022 import org.crsh.command.CommandInvoker;
023 import org.crsh.command.InvocationContext;
024 import org.crsh.command.ScriptException;
025 import org.crsh.io.Consumer;
026 import org.crsh.text.Chunk;
027 import org.crsh.shell.ScreenContext;
028 import org.crsh.text.RenderPrintWriter;
029
030 import java.io.IOException;
031 import java.util.Map;
032
033 class InnerInvocationContext<P> implements InvocationContext<P> {
034
035 /** . */
036 final InvocationContext<?> outter;
037
038 /** . */
039 final Consumer<P> consumer;
040
041 /** . */
042 private RenderPrintWriter writer;
043
044 /** . */
045 private final boolean piped;
046
047 InnerInvocationContext(
048 InvocationContext<?> outter,
049 Consumer<P> consumer,
050 boolean piped) {
051
052 //
053 this.outter = outter;
054 this.consumer = consumer;
055 this.piped = piped;
056 }
057
058 public boolean isPiped() {
059 return piped;
060 }
061
062 public CommandInvoker<?, ?> resolve(String s) throws ScriptException, IOException {
063 return outter.resolve(s);
064 }
065
066 public int getWidth() {
067 return outter.getWidth();
068 }
069
070 public int getHeight() {
071 return outter.getHeight();
072 }
073
074 public boolean takeAlternateBuffer() throws IOException {
075 return outter.takeAlternateBuffer();
076 }
077
078 public boolean releaseAlternateBuffer() throws IOException {
079 return outter.releaseAlternateBuffer();
080 }
081
082 public String getProperty(String propertyName) {
083 return outter.getProperty(propertyName);
084 }
085
086 public String readLine(String msg, boolean echo) {
087 return outter.readLine(msg, echo);
088 }
089
090 public RenderPrintWriter getWriter() {
091 if (writer == null) {
092 writer = new RenderPrintWriter(new ScreenContext<Chunk>() {
093 public Class<Chunk> getConsumedType() {
094 return Chunk.class;
095 }
096 public int getWidth() {
097 return outter.getWidth();
098 }
099 public int getHeight() {
100 return outter.getHeight();
101 }
102 public void provide(Chunk element) throws IOException {
103 Class<P> consumedType = consumer.getConsumedType();
104 if (consumedType.isInstance(element)) {
105 P p = consumedType.cast(element);
106 consumer.provide(p);
107 }
108 }
109 public void flush() throws IOException {
110 consumer.flush();
111 }
112 });
113 }
114 return writer;
115 }
116
117 public Class<P> getConsumedType() {
118 return consumer.getConsumedType();
119 }
120
121 public void provide(P element) throws IOException {
122 consumer.provide(element);
123 }
124
125 public void flush() throws IOException {
126 consumer.flush();
127 }
128
129 public void close() throws IOException {
130 // Nothing to do
131 }
132
133 public Map<String, Object> getSession() {
134 return outter.getSession();
135 }
136
137 public Map<String, Object> getAttributes() {
138 return outter.getAttributes();
139 }
140 }