listtei.java

来自「jakarta-taglibs」· Java 代码 · 共 68 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.jndi;

import javax.servlet.jsp.tagext.*;

/**
 *
 * @author  Danno Ferrin <[e-mail]>
 * @version $Revision: 1.2 $
 */
public class ListTEI extends TagExtraInfo {

    /** Creates new UseContextTEI */
    public ListTEI() {
    }

    public VariableInfo[] getVariableInfo(TagData data) {
        String nameId, classId, objId;
        nameId = data.getAttributeString("nameId");
        classId = data.getAttributeString("classId");
        objId = data.getAttributeString("objId");
        // an unrolled loop will be quicker than a Vector or List
        int size = 
              ((nameId == null)?0:1)
            + ((classId == null)?0:1)
            + ((objId == null)?0:1);
        VariableInfo[] ret = new VariableInfo[size];
        if (objId != null) {
            ret[--size] = new VariableInfo(objId, "java.lang.Object", true, 
                    VariableInfo.NESTED);
        }
        if (classId != null) {
            ret[--size] = new VariableInfo(classId, "java.lang.String", true, 
                    VariableInfo.NESTED);
        }
        if (nameId != null) {
            ret[--size] = new VariableInfo(nameId, "java.lang.String", true, 
                    VariableInfo.NESTED);
        }
        return ret;
    }
    
    public boolean isValid(TagData data) {
        if (
            (data.getAttribute("context") == null) 
         && (data.getAttribute("contextRef") == null)) {
            return false;
        }
        return true;
    }
    
}