/*

  * $Header: /home/projects/jaxen/scm/jaxen/src/java/main/org/jaxen/expr/DefaultFunctionCallExpr.java,v 1.17 2006/11/30 18:49:27 elharo Exp $

  * $Revision: 1.17 $

  * $Date: 2006/11/30 18:49:27 $

  *

  * ====================================================================

  *

  * Copyright 2000-2004 bob mcwhirter & James Strachan.

  * All rights reserved.

  *

  *

  * Redistribution and use in source and binary forms, with or without

  * modification, are permitted provided that the following conditions are

  * met:

  * 

  *   * Redistributions of source code must retain the above copyright

  *     notice, this list of conditions and the following disclaimer.

  * 

  *   * 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.

  * 

  *   * Neither the name of the Jaxen Project nor the names of its

  *     contributors may be used to endorse or promote products derived 

  *     from this software without specific prior written permission.

  * 

  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS

  * IS" AND ANY EXPRESS 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 COPYRIGHT OWNER

  * OR 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 Jaxen Project and was originally

  * created by bob mcwhirter <bob@werken.com> and

  * James Strachan <jstrachan@apache.org>.  For more information on the

  * Jaxen Project, please see <http://www.jaxen.org/>.

  *

  * $Id: DefaultFunctionCallExpr.java,v 1.17 2006/11/30 18:49:27 elharo Exp $

  */

 package org.jaxen.expr;

 import java.util.ArrayList;

 import java.util.Iterator;

 import java.util.List;

 import org.jaxen.Context;

 import org.jaxen.Function;

 import org.jaxen.JaxenException;

 /**

  * @deprecated this class will become non-public in the future;

  *     use the interface instead

  */

 public class DefaultFunctionCallExpr extends DefaultExpr implements FunctionCallExpr

 {

     /**

      * 

      */

     private static final long serialVersionUID = -4747789292572193708L;

     private String prefix;

     private String functionName;

     private List parameters;

     public DefaultFunctionCallExpr(String prefix, String functionName)

     {

         this.prefix = prefix;

         this.functionName = functionName;

         this.parameters = new ArrayList();

     }

     public void addParameter(Expr parameter)

     {

         this.parameters.add(parameter);

     }

     public List getParameters()

     {

         return this.parameters;

     }

     public String getPrefix()

     {

         return this.prefix;

     }

     public String getFunctionName()

     {

         return this.functionName;

     }

     public String getText()

     {

         StringBuffer buf = new StringBuffer();

         String prefix = getPrefix();

         if (prefix != null &&

                 prefix.length() > 0)

         {

             buf.append(prefix);

             buf.append(":");

         }

         buf.append(getFunctionName());

         buf.append("(");

         Iterator paramIter = getParameters().iterator();

         while (paramIter.hasNext()) {

             Expr eachParam = (Expr) paramIter.next();

             buf.append(eachParam.getText());

             if (paramIter.hasNext())

             {

                 buf.append(", ");

             }

         }

         buf.append(")");

         return buf.toString();

     }

     public Expr simplify()

     {

         List paramExprs = getParameters();

         int paramSize = paramExprs.size();

         List newParams = new ArrayList(paramSize);

         for (int i = 0; i < paramSize; ++i)

         {

             Expr eachParam = (Expr) paramExprs.get(i);

             newParams.add(eachParam.simplify());

         }

         this.parameters = newParams;

         return this;

     }

     public String toString()

     {

         String prefix = getPrefix();

         if (prefix == null)

         {

             return "[(DefaultFunctionCallExpr): " + getFunctionName() + "(" + getParameters() + ") ]";

         }

         return "[(DefaultFunctionCallExpr): " + getPrefix() + ":" + getFunctionName() + "(" + getParameters() + ") ]";

     }

     public Object evaluate(Context context) throws JaxenException

     {

         String namespaceURI =

                 context.translateNamespacePrefixToUri(getPrefix());

         Function func = context.getFunction(namespaceURI,

                 getPrefix(),

                 getFunctionName());

         List paramValues = evaluateParams(context);

         return func.call(context, paramValues);

     }

     public List evaluateParams(Context context) throws JaxenException

     {

         List paramExprs = getParameters();

         int paramSize = paramExprs.size();

         List paramValues = new ArrayList(paramSize);

         for (int i = 0; i < paramSize; ++i)

         {

             Expr eachParam = (Expr) paramExprs.get(i);

             Object eachValue = eachParam.evaluate(context);

             paramValues.add(eachValue);

         }

         return paramValues;

     }

 }