package com.esotericsoftware.scar.support;

import java.util.*;

public class ShellArgs {
    private final List<String> mArgs = new ArrayList<String>();

    public ShellArgs add( String pSingleArg ) {
        if ( null != (pSingleArg = significant( pSingleArg )) ) {
            mArgs.add( pSingleArg );
        }
        return this;
    }

    public ShellArgs add( String pLeader, String pValue ) {
        if ( (null != (pLeader = significant( pLeader ))) && (null != (pValue = significant( pValue ))) ) {
            mArgs.add( pLeader );
            mArgs.add( pValue );
        }
        return this;
    }

    public ShellArgs add( String[] pArgs ) {
        if (pArgs != null) {
            Collections.addAll( mArgs, pArgs );
        }
        return this;
    }

    public String[] toArray() {
        return mArgs.toArray( new String[mArgs.size()] );
    }

    private String significant( String pValue ) {
        if ( pValue != null ) {
            if ( (pValue = pValue.trim()).length() == 0 ) {
                pValue = null;
            }
        }
        return pValue;
    }
}