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/*******************************************************************************
* Copyright (c) 2003, 2010 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.osgi.framework.console;
import java.util.Dictionary;
import org.osgi.framework.Bundle;
/**
* A command interpreter is a shell that can interpret command
* lines. This object is passed as parameter when a CommandProvider
* is invoked.
* <p>
* This interface is not intended to be implemented by clients.
* </p>
* @since 3.1
* @noimplement This interface is not intended to be implemented by clients.
*/
public interface CommandInterpreter {
/**
* Get the next argument in the input. If no arguments are left then null is returned.
*
* E.g. if the commandline is hello world, the _hello method
* will get "world" as the first argument.
* @return the next argument or null if no arguments are left.
*/
public String nextArgument();
/**
* Execute a command line as if it came from the end user
* and return the result.
* @param cmd The command line to execute.
* @return the result of the command.
*/
public Object execute(String cmd);
/**
* Prints an object to the outputstream
*
* @param o the object to be printed
*/
public void print(Object o);
/**
* Prints an empty line to the outputstream
*/
public void println();
/**
* Prints an object to the output medium (appended with newline character).
* <p>
* If running on the target environment the user is prompted with '--more'
* if more than the configured number of lines have been printed without user prompt.
* That way the user of the program has control over the scrolling.
* <p>
* For this to work properly you should not embedded "\n" etc. into the string.
*
* @param o the object to be printed
*/
public void println(Object o);
/**
* Print a stack trace including nested exceptions.
* @param t The offending exception
*/
public void printStackTrace(Throwable t);
/**
* Prints the given dictionary sorted by keys.
*
* @param dic the dictionary to print
* @param title the header to print above the key/value pairs
*/
public void printDictionary(Dictionary<?, ?> dic, String title);
/**
* Prints the given bundle resource if it exists
*
* @param bundle the bundle containing the resource
* @param resource the resource to print
*/
public void printBundleResource(Bundle bundle, String resource);
}
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