// This Source Code is in the Public Domain per: http://litesoft.org/License.txt
package org.litesoft.util.template;

import java.io.*;

import org.litesoft.commonfoundation.typeutils.*;

import java.util.*;

import org.litesoft.commonfoundation.typeutils.Objects;

public class TemplateControl extends AbstractReaderTC
{
    private String mForwardTo;

    private TemplateControl( String pForwardTo, Reader pTemplate, Collection<TCsub> pSubstitutions )
    {
        super( pTemplate, pSubstitutions );
        mForwardTo = pForwardTo;
    }

    public TemplateControl( String pForwardTo )
    {
        this( Strings.assertNotNullNotEmpty( "ForwardTo", pForwardTo ), null, null );
    }

    public TemplateControl( Reader pTemplate, Collection<TCsub> pSubstitutions )
    {
        this( null, pTemplate, pSubstitutions );
        Objects.assertNotNull( "Template", mTemplate = pTemplate );
    }

    public TemplateControl( Reader pTemplate, TCsub... pSubstitutions )
    {
        this( pTemplate, makeSet( pSubstitutions ) );
    }

    public TemplateControl( Reader pTemplate, String... pSubstitutions )
    {
        this( pTemplate, makeSet( pSubstitutions ) );
    }

    public TemplateControl( String pTemplate, String... pSubstitutions )
    {
        this( new StringReader( pTemplate ), pSubstitutions );
    }

    public boolean isForwardTo()
    {
        return (mForwardTo != null);
    }

    public String getForwardTo()
    {
        return mForwardTo;
    }

    /**
     * Transfers the text from mTemplate to the pWriter applying the mSubstitutions.
     *
     * @param pWriter - !null
     */
    public final void applyTo( Writer pWriter, String pReplaceNotFoundsWith )
            throws IOException
    {
        Objects.assertNotNull( "Writer", pWriter );
        pReplaceNotFoundsWith = Strings.deNull( pReplaceNotFoundsWith );
        pWriter.write( blocksFromReaderReplace( pWriter, pReplaceNotFoundsWith ) );
        pWriter.flush();
    }
}