AbstractCommand.java

package com.aptana.ruby.internal.debug.core.commands;

import java.io.IOException;

import com.aptana.ruby.internal.debug.core.DebuggerNotFoundException;
import com.aptana.ruby.internal.debug.core.parsing.AbstractReadStrategy;
import com.aptana.ruby.internal.debug.core.parsing.XmlStreamReader;

public abstract class AbstractCommand
{
	private String command;
	private boolean isControl;
	private XmlStreamReader resultReader;

	protected AbstractCommand(String command, boolean isControl)
	{
		this.command = command;
		this.isControl = isControl;
	}

	public void execute(AbstractDebuggerConnection debuggerConnection) throws DebuggerNotFoundException, IOException
	{
		AbstractReadStrategy readStrategy = debuggerConnection.sendCommand(this);
		resultReader = createResultReader(readStrategy);
	}

	protected abstract XmlStreamReader createResultReader(AbstractReadStrategy readStrategy);

	public XmlStreamReader getResultReader()
	{
		if (!isExecuted())
		{
			throw new IllegalStateException("getResultReader must only be called after the command was executed."); //$NON-NLS-1$
		}
		return resultReader;
	}

	public String getCommand()
	{
		return command;
	}

	public boolean isControl()
	{
		return isControl;
	}

	public boolean isExecuted()
	{
		return resultReader != null;
	}
}