TagInfo.java
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上传日期:2022-07-20
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文件大小:7k
源码类别:
数据库编程
开发平台:
Java
- /*
- * The Apache Software License, Version 1.1
- *
- * Copyright (c) 1999 The Apache Software Foundation. All rights
- * reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. The end-user documentation included with the redistribution, if
- * any, must include the following acknowlegement:
- * "This product includes software developed by the
- * Apache Software Foundation (http://www.apache.org/)."
- * Alternately, this acknowlegement may appear in the software itself,
- * if and wherever such third-party acknowlegements normally appear.
- *
- * 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
- * Foundation" must not be used to endorse or promote products derived
- * from this software without prior written permission. For written
- * permission, please contact apache@apache.org.
- *
- * 5. Products derived from this software may not be called "Apache"
- * nor may "Apache" appear in their names without prior written
- * permission of the Apache Group.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
- * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- * ====================================================================
- *
- * This software consists of voluntary contributions made by many
- * individuals on behalf of the Apache Software Foundation. For more
- * information on the Apache Software Foundation, please see
- * <http://www.apache.org/>.
- *
- */
- package javax.servlet.jsp.tagext;
- /**
- * Tag information for a tag in a Tag Library;
- * this class is instantiated from the Tag Library Descriptor file (TLD).
- *
- */
- public class TagInfo {
- /**
- * static constant for getBodyContent() when it is JSP
- */
- public static final String BODY_CONTENT_JSP = "JSP";
- /**
- * static constant for getBodyContent() when it is Tag dependent
- */
- public static final String BODY_CONTENT_TAG_DEPENDENT = "TAGDEPENDENT";
- /**
- * static constant for getBodyContent() when it is empty
- */
- public static final String BODY_CONTENT_EMPTY = "EMPTY";
- /**
- * Constructor for TagInfo.
- * No public constructor; this class is to be instantiated only from the
- * TagLibrary code under request from some JSP code that is parsing a
- * TLD (Tag Library Descriptor).
- *
- * @param tagName The name of this tag
- * @param tagClassName The name of the tag handler class
- * @param bodycontent Information on the body content of these tags
- * @param infoString The (optional) string information for this tag
- * @param taglib The instance of the tag library that contains us.
- * @param tagExtraInfo The instance providing extra Tag info. May be null
- * @param attributeInfo An array of AttributeInfo data from descriptor.
- * May be null;
- *
- */
- public TagInfo(String tagName,
- String tagClassName,
- String bodycontent,
- String infoString,
- TagLibraryInfo taglib,
- TagExtraInfo tagExtraInfo,
- TagAttributeInfo[] attributeInfo) {
- this.tagName = tagName;
- this.tagClassName = tagClassName;
- this.bodyContent = bodycontent;
- this.infoString = infoString;
- this.tagLibrary = taglib;
- this.tagExtraInfo = tagExtraInfo;
- this.attributeInfo = attributeInfo;
- if (tagExtraInfo != null)
- tagExtraInfo.setTagInfo(this);
- }
- /**
- * Tag name
- */
- public String getTagName() {
- return tagName;
- }
- /**
- * A null return means no information on attributes
- */
- public TagAttributeInfo[] getAttributes() {
- return attributeInfo;
- }
- /**
- * Information on the object created by this tag at runtime.
- * Null means no such object created.
- *
- * Default is null if the tag has no "id" attribute,
- * otherwise, {"id", Object}
- */
- public VariableInfo[] getVariableInfo(TagData data) {
- TagExtraInfo tei = getTagExtraInfo();
- if (tei == null) {
- return null;
- }
- return tei.getVariableInfo(data);
- }
- /**
- * Translation-time validation of the attributes. The argument is a
- * translation-time, so request-time attributes are indicated as such.
- *
- * @param data The translation-time TagData instance.
- */
- public boolean isValid(TagData data) {
- TagExtraInfo tei = getTagExtraInfo();
- if (tei == null) {
- return true;
- }
- return tei.isValid(data);
- }
- /**
- The instance (if any) for extra tag information
- */
- public TagExtraInfo getTagExtraInfo() {
- return tagExtraInfo;
- }
- /**
- * Name of the class that provides the (run-time handler for this tag
- */
- public String getTagClassName() {
- return tagClassName;
- }
- /**
- * @return the body content (hint) string
- */
- public String getBodyContent() { return bodyContent; }
- /**
- * @return the info string
- */
- public String getInfoString() { return infoString; }
- /**
- * @return the tab library instance we belong to
- */
- public TagLibraryInfo getTagLibrary() { return tagLibrary; }
- /**
- * Stringify for debug purposes...
- */
- public String toString() {
- StringBuffer b = new StringBuffer();
- b.append("name = "+tagName+" ");
- b.append("class = "+tagClassName+" ");
- b.append("body = "+bodyContent+" ");
- b.append("info = "+infoString+" ");
- b.append("attributes = {n");
- for(int i = 0; i < attributeInfo.length; i++)
- b.append("t"+attributeInfo[i].toString());
- b.append("n}n");
- return b.toString();
- }
- /*
- * private fields
- */
- private String tagName; // the name of the tag
- private String tagClassName;
- private String bodyContent;
- private String infoString;
- private TagLibraryInfo tagLibrary;
- private TagExtraInfo tagExtraInfo; // instance of TagExtraInfo
- private TagAttributeInfo[] attributeInfo;
- }