io.continual.templating.impl.BasicContext Maven / Gradle / Ivy

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package io.continual.templating.impl;

import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;

import io.continual.templating.ContinualTemplateContext;

public class BasicContext implements ContinualTemplateContext
{
	public BasicContext ()
	{
		fMap = new HashMap<>();
	}

	@Override
	public Object get ( String key )
	{
		return fMap.get ( key );
	}

	public Set keys ()
	{
		return Collections.unmodifiableSet ( fMap.keySet () );
	}

	@Override
	public ContinualTemplateContext put ( String key, Object o )
	{
		if ( key == null ) throw new NullPointerException ( "Cannot put a null key." );
		if ( o != null )
		{
			fMap.put ( key, o );
		}
		return this;
	}

	@Override
	public ContinualTemplateContext putAll ( Map data )
	{
		for ( Map.Entry e : data.entrySet () )
		{
			put ( e.getKey (), e.getValue () );
		}
		return this;
	}

	@Override
	public ContinualTemplateContext remove ( String key )
	{
		if ( key == null ) throw new NullPointerException ( "Cannot remove a null key." );
		fMap.remove ( key );
		return this;
	}

	public Map getAsMap () { return fMap; }

	private final HashMap fMap;
}