leftpadtag.java

来自「jakarta-taglibs」· Java 代码 · 共 101 行

/*
 * Copyright 1999,2004 The Apache Software Foundation.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.taglibs.string;

import javax.servlet.jsp.JspException;
import org.apache.commons.lang.StringUtils;
import org.apache.commons.lang.math.NumberUtils;

/**
 * Left pad a string with a particular delimiter to a 
 * specified width. The width includes the size of 
 * the string.
 *
 * <dl>
 * <dt>delimiter</dt><dd>
 *             String to pad the larger String with.
 *             Default is a space character.
 * </dd>
 * <dt>width</dt><dd>
 *             Size of larger String.
 *             Required.
 * </dd>
 * </dl>
 * 
 * @author [e-mail]
 */
public class LeftPadTag extends StringTagSupport {

    private String delimiter;
    private String width;

    public LeftPadTag() {
        super();
    }

    /**
     * Get the delimiter property
     *
     * @return String property
     */
    public String getDelimiter() {
        return this.delimiter;
    }

    /**
     * Set the delimiter property
     *
     * @param delimiter String property
     */
    public void setDelimiter(String delimiter) {
        this.delimiter = delimiter;
    }


    /**
     * Get the width property
     *
     * @return String property
     */
    public String getWidth() {
        return this.width;
    }

    /**
     * Set the width property
     *
     * @param width String property
     */
    public void setWidth(String width) {
        this.width = width;
    }



    public String changeString(String text) throws JspException {
        return StringUtils.leftPad(text, NumberUtils.stringToInt(width), delimiter);
    }

    public void initAttributes() {

        this.delimiter = " ";

        this.width = "0";

    }

}