ubic.gemma.web.taglib.ConstantsTei.java Source code

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Here is the source code for ubic.gemma.web.taglib.ConstantsTei.java

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/*
 * The Gemma project
 * 
 * Copyright (c) 2006 University of British Columbia
 * 
 * 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 ubic.gemma.web.taglib;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import ubic.gemma.web.util.Constants;

import javax.servlet.jsp.tagext.TagData;
import javax.servlet.jsp.tagext.TagExtraInfo;
import javax.servlet.jsp.tagext.VariableInfo;
import java.lang.reflect.AccessibleObject;
import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.List;

/**
 * Implementation of <code>TagExtraInfo</code> for the <b>constants</b> tag, identifying the scripting object(s) to be
 * made visible.
 * 
 * @author Matt Raible
 *
 */
public class ConstantsTei extends TagExtraInfo {
    private final Log log = LogFactory.getLog(ConstantsTei.class);

    /**
     * Return information about the scripting variables to be created.
     */
    @Override
    public VariableInfo[] getVariableInfo(TagData data) {
        // loop through and expose all attributes
        List<VariableInfo> vars = new ArrayList<VariableInfo>();

        try {
            String clazz = data.getAttributeString("className");

            if (clazz == null) {
                clazz = Constants.class.getName();
            }

            Class<?> c = Class.forName(clazz);

            // if no var specified, get all
            if (data.getAttributeString("var") == null) {
                Field[] fields = c.getDeclaredFields();

                AccessibleObject.setAccessible(fields, true);

                for (int i = 0; i < fields.length; i++) {
                    vars.add(new VariableInfo(fields[i].getName(), "java.lang.String", true, VariableInfo.AT_END));
                }
            } else {
                String var = data.getAttributeString("var");
                vars.add(
                        new VariableInfo(c.getField(var).getName(), "java.lang.String", true, VariableInfo.AT_END));
            }
        } catch (Exception cnf) {
            log.error(cnf.getMessage());
            cnf.printStackTrace();
        }

        return vars.toArray(new VariableInfo[] {});
    }
}