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    • org.crsh.lang.groovy.ShellBinding Maven / Gradle / Ivy

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    /*
 * Copyright (C) 2012 eXo Platform SAS.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package org.crsh.lang.groovy;

import groovy.lang.Binding;
import org.crsh.command.CommandContext;
import org.crsh.command.CommandCreationException;
import org.crsh.command.InvocationContextImpl;
import org.crsh.command.ShellCommand;
import org.crsh.lang.groovy.closure.PipeLineClosure;
import org.crsh.shell.impl.command.CRaSH;
import org.crsh.text.Chunk;

import java.io.IOException;
import java.util.Map;

/** @author Julien Viet */
public class ShellBinding extends Binding {

  /** . */
  private CommandContext current;

  private CommandContext proxy = new CommandContext() {
    public boolean isPiped() {
      if (current == null) {
        throw new IllegalStateException("Not under context");
      } else {
        return current.isPiped();
      }
    }
    public void close() throws IOException {
      if (current == null) {
        throw new IllegalStateException("Not under context");
      } else {
        current.close();
      }
    }
    public boolean takeAlternateBuffer() throws IOException {
      if (current == null) {
        throw new IllegalStateException("Not under context");
      } else {
        return current.takeAlternateBuffer();
      }
    }
    public boolean releaseAlternateBuffer() throws IOException {
      if (current == null) {
        throw new IllegalStateException("Not under context");
      } else {
        return current.releaseAlternateBuffer();
      }
    }
    public String readLine(String msg, boolean echo) {
      if (current == null) {
        throw new IllegalStateException("Not under context");
      } else {
        return current.readLine(msg, echo);
      }
    }
    public int getWidth() {
      if (current == null) {
        throw new IllegalStateException("Not under context");
      } else {
        return current.getWidth();
      }
    }
    public int getHeight() {
      if (current == null) {
        throw new IllegalStateException("Not under context");
      } else {
        return current.getWidth();
      }
    }
    public void provide(Object element) throws IOException {
      if (current == null) {
        throw new IllegalStateException("Not under context");
      } else {
        current.provide(element);
      }
    }
    public Class getConsumedType() {
      if (current == null) {
        throw new IllegalStateException("Not under context");
      } else {
        return current.getConsumedType();
      }
    }
    public void flush() throws IOException {
      if (current == null) {
        throw new IllegalStateException("Not under context");
      } else {
        current.flush();
      }
    }
    public String getProperty(String propertyName) {
      if (current == null) {
        throw new IllegalStateException("Not under context");
      } else {
        return current.getProperty(propertyName);
      }
    }
    public Map getSession() {
      if (current == null) {
        throw new IllegalStateException("Not under context");
      } else {
        return current.getSession();
      }
    }
    public Map getAttributes() {
      if (current == null) {
        throw new IllegalStateException("Not under context");
      } else {
        return current.getAttributes();
      }
    }
    public void write(Chunk chunk) throws IOException {
      if (current == null) {
        throw new IllegalStateException("Not under context");
      } else {
        current.write(chunk);
      }
    }
  };

  public ShellBinding(Map variables) {
    super(variables);
  }

  public CommandContext getCurrent() {
    return current;
  }

  public void setCurrent(CommandContext current) {
    this.current = current;
  }

  @Override
  public Object getVariable(String name) {
    if (name.equals("context")) {
      return new InvocationContextImpl(proxy);
    } else {
      CRaSH crash = (CRaSH)super.getVariable("crash");
      if (crash != null) {
        try {
          ShellCommand cmd = crash.getCommand(name);
          if (cmd != null) {
            return new PipeLineClosure(null, name, cmd);
          }
        } catch (CommandCreationException ignore) {
          //
        }
        return super.getVariable(name);
      } else {
        return super.getVariable(name);
      }
    }
  }
}
    
    
    
    

    




    
    
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