Package de.innovationgate.wgpublisher.webtml

Source Code of de.innovationgate.wgpublisher.webtml.Option

/*******************************************************************************
* Copyright 2009, 2010 Innovation Gate GmbH. All Rights Reserved.
*
* This file is part of the OpenWGA server platform.
*
* OpenWGA is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* In addition, a special exception is granted by the copyright holders
* of OpenWGA called "OpenWGA plugin exception". You should have received
* a copy of this exception along with OpenWGA in file COPYING.
* If not, see <http://www.openwga.com/gpl-plugin-exception>.
*
* OpenWGA is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with OpenWGA in file COPYING.
* If not, see <http://www.gnu.org/licenses/>.
******************************************************************************/
package de.innovationgate.wgpublisher.webtml;

import de.innovationgate.wgpublisher.expressions.ExpressionEngineFactory;
import de.innovationgate.wgpublisher.expressions.ExpressionResult;
import de.innovationgate.wgpublisher.expressions.tmlscript.RhinoExpressionEngine;
import de.innovationgate.wgpublisher.webtml.utils.TMLException;

public class Option extends Base {
 
  private String name;
  private String mode;
    private String scope;
    private String expression;
    private String _default;
    private String _defaultexpression;
   
  /**
   * @see Base#tmlEndTag()
   */
  public void tmlEndTag() throws TMLException {


   
    Object result = this.getResultString();
   
    boolean setMode = false;
    String theMode = getMode();
   
    // If mode-Att is set, determine mode by it
    if (theMode != null) {
        if (theMode.equals("set") || theMode.equals("write")) {
            setMode = true;
        }
    }
   
    // Else determine by the presence of tag content
    else {
        setMode = !result.equals("") || getExpression() != null;
    }
   
    // Get mode
    if (!setMode) {
      Object value = getOption(this.getName());
      if (value == null) {
          // Try to find a default value
        String defaultValue = getDefault();
                String defaultExpression = getDefaultexpression();
        if (defaultValue == null && defaultExpression == null) {
                    return;
                }
       
        if (defaultValue != null) {
            value = defaultValue;
        }
        else if (defaultExpression != null) {
            value = calculateOptionByExpression(defaultExpression);
        }
      }
      this.setResult(value);
    }
   
    // Set mode
    else {
            this.setResultOutput(false);
           
      BaseTagStatus parent = getStatus().getParentTag();
      if (parent == null) {
        this.addWarning("Parent tag is no option receptor", true);
        return;
      }
           
            String expr = getExpression();
            if (expr != null) {
                result = calculateOptionByExpression(expr);
            }
           
            try {
                parent.setOption(this.getName(), result, scope);
            }
            catch (IllegalArgumentException e) {
                addWarning(e.getMessage(), true);
            }
    }
   



  }

    private Object calculateOptionByExpression(String expr) throws TMLException {
        Object result = null;
        RhinoExpressionEngine engine = ExpressionEngineFactory.getTMLScriptEngine();
        ExpressionResult exprResult = engine.evaluateExpression(expr, getTMLContext(), RhinoExpressionEngine.TYPE_EXPRESSION, null);
        if (!exprResult.isError()) {
            result = exprResult.getResult();
            return result;
        }
        else {
            throw new TMLException("Error evaluation option expression: " + exprResult.getException().getClass() + exprResult.getException().getMessage(), true);
        }
       
    }

  /**
   * Gets the name
   * @return Returns a String
   */
  public String getName() {
    return this.getTagAttributeValue("name", name, "");
  }
  /**
   * Sets the name
   * @param name The name to set
   */
  public void setName(String name) {
    this.name = name;
  }

    /**
     * @return Returns the mode.
     */
    public String getMode() {
        return getTagAttributeValue("mode", mode, null);
    }
    /**
     * @param mode The mode to set.
     */
    public void setMode(String mode) {
        this.mode = mode;
    }

    public String getScope() {
        return getTagAttributeValue("scope", scope, null);
    }

    public void setScope(String scope) {
        this.scope = scope;
    }

    public String getExpression() {
        return getTagAttributeValue("expression", expression, null);
    }

    public void setExpression(String expression) {
        this.expression = expression;
    }

    public String getDefault() {
        return getTagAttributeValue("default", _default, null);
    }

    public void setDefault(String default1) {
        _default = default1;
    }

    public String getDefaultexpression() {
        return getTagAttributeValue("defaultexpression", _defaultexpression, null);
    }

    public void setDefaultexpression(String defaultexpression) {
        _defaultexpression = defaultexpression;
    }
}
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