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.command;
021    
022    import org.crsh.io.Consumer;
023    import org.crsh.text.Chunk;
024    import org.crsh.io.IOContext;
025    import org.crsh.text.RenderPrintWriter;
026    
027    import java.io.IOException;
028    import java.util.Map;
029    
030    class InnerInvocationContext<P> implements InvocationContext<P> {
031    
032      /** . */
033      final InvocationContext<?> outter;
034    
035      /** . */
036      final Consumer<P> consumer;
037    
038      /** . */
039      private RenderPrintWriter writer;
040    
041      InnerInvocationContext(
042        InvocationContext<?> outter,
043        Consumer<P> consumer) {
044    
045        //
046        this.outter = outter;
047        this.consumer = consumer;
048      }
049    
050      public CommandInvoker<?, ?> resolve(String s) throws ScriptException, IOException {
051        return outter.resolve(s);
052      }
053    
054      public int getWidth() {
055        return outter.getWidth();
056      }
057    
058      public int getHeight() {
059        return outter.getHeight();
060      }
061    
062      public String getProperty(String propertyName) {
063        return outter.getProperty(propertyName);
064      }
065    
066      public String readLine(String msg, boolean echo) {
067        return outter.readLine(msg, echo);
068      }
069    
070      public RenderPrintWriter getWriter() {
071        if (writer == null) {
072          writer = new RenderPrintWriter(new IOContext<Chunk>() {
073            public int getWidth() {
074              return outter.getWidth();
075            }
076            public int getHeight() {
077              return outter.getHeight();
078            }
079            public void provide(Chunk element) throws IOException {
080              Class<P> consumedType = consumer.getConsumedType();
081              if (consumedType.isInstance(element)) {
082                P p = consumedType.cast(element);
083                consumer.provide(p);
084              }
085            }
086            public void flush() throws IOException {
087              consumer.flush();
088            }
089          });
090        }
091        return writer;
092      }
093    
094      public Class<P> getConsumedType() {
095        return consumer.getConsumedType();
096      }
097    
098      public void provide(P element) throws IOException {
099        consumer.provide(element);
100      }
101    
102      public void flush() throws IOException {
103        consumer.flush();
104      }
105    
106      public Map<String, Object> getSession() {
107        return outter.getSession();
108      }
109    
110      public Map<String, Object> getAttributes() {
111        return outter.getAttributes();
112      }
113    }