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package com.github.antelopeframework.mybatis.util;

import java.util.Arrays;
import java.util.Iterator;

public class StringHelper {
	
	public static String join(String seperator, String[] strings) {
		int length = strings.length;
		if ( length == 0 ) {
			return "";
		}
		StringBuilder buf = new StringBuilder( length * strings[0].length() )
				.append( strings[0] );
		for ( int i = 1; i < length; i++ ) {
			buf.append( seperator ).append( strings[i] );
		}
		return buf.toString();
	}


	public static String join(String seperator, Iterator objects) {
		StringBuilder buf = new StringBuilder();
		if ( objects.hasNext() ) {
			buf.append( objects.next() );
		}
		while ( objects.hasNext() ) {
			buf.append( seperator ).append( objects.next() );
		}
		return buf.toString();
	}

	public static String join(String separator, Iterable objects) {
		return join( separator, objects.iterator() );
	}

	public static String[] add(String[] x, String sep, String[] y) {
		final String[] result = new String[x.length];
		for ( int i = 0; i < x.length; i++ ) {
			result[i] = x[i] + sep + y[i];
		}
		return result;
	}

	public static String repeat(String string, int times) {
		StringBuilder buf = new StringBuilder( string.length() * times );
		for ( int i = 0; i < times; i++ ) {
			buf.append( string );
		}
		return buf.toString();
	}

	public static String repeat(String string, int times, String deliminator) {
		StringBuilder buf = new StringBuilder( ( string.length() * times ) + ( deliminator.length() * ( times - 1 ) ) )
				.append( string );
		for ( int i = 1; i < times; i++ ) {
			buf.append( deliminator ).append( string );
		}
		return buf.toString();
	}

	public static String repeat(char character, int times) {
		char[] buffer = new char[times];
		Arrays.fill( buffer, character );
		return new String( buffer );
	}
	
	public static String unqualify(String qualifiedName) {
		int loc = qualifiedName.lastIndexOf( "." );
		return ( loc < 0 ) ? qualifiedName : qualifiedName.substring( loc + 1 );
	}

	public static String qualifier(String qualifiedName) {
		int loc = qualifiedName.lastIndexOf( "." );
		return ( loc < 0 ) ? "" : qualifiedName.substring( 0, loc );
	}
}