org.ocpsoft.rewrite.param.ParameterBuilder Maven / Gradle / Ivy

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/*
 * Copyright 2011 Lincoln Baxter, III
 *
 * 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.ocpsoft.rewrite.param;

import java.util.ArrayList;
import java.util.List;
import java.util.ListIterator;

import org.ocpsoft.rewrite.bind.Binding;

/**
 * An base implementation of {@link Parameter}
 * 
 * @author Lincoln Baxter, III
 */
public abstract class ParameterBuilder> implements
         ConfigurableParameter
{
   private final List bindings = new ArrayList();
   private final List> transpositions = new ArrayList>();
   private final List> constraints = new ArrayList>();
   private Converter converter = null;
   private Validator validator = null;
   private String name;

   /**
    * Create a new {@link ParameterBuilder} instance with the given name.
    */
   protected ParameterBuilder(String name)
   {
      this.name = name;
   }

   @Override
   @SuppressWarnings("unchecked")
   public IMPLTYPE configuredBy(ParameterConfigurator configurator)
   {
      if (configurator instanceof Binding)
         bindsTo((Binding) configurator);
      if (configurator instanceof Constraint)
         constrainedBy((Constraint) configurator);
      if (configurator instanceof Converter)
         convertedBy((Converter) configurator);
      if (configurator instanceof Validator)
         validatedBy((Validator) configurator);
      if (configurator instanceof Transposition)
         transposedBy((Transposition) configurator);

      return (IMPLTYPE) this;
   }

   @Override
   @SuppressWarnings("unchecked")
   public IMPLTYPE bindsTo(final Binding binding)
   {
      addOrReplaceBinding(binding);
      return (IMPLTYPE) this;
   }
   
   /*
    * Bindings must be added to the front of the list, since we want the
    * ability to override the default binding if necessary.
    */
   private void addOrReplaceBinding(final Binding binding)
   {
      ListIterator iterator = this.bindings.listIterator();
      while(iterator.hasNext())
      {
         Binding current = iterator.next();
         if(current.toString().equals(binding.toString())) // binding does not implements equals/hashCode
         {  
            iterator.remove();
            iterator.add(binding);
            return;
         }
      }
      
      this.bindings.add(0, binding);
   }

   @Override
   public List getBindings()
   {
      return bindings;
   }

   @Override
   public String getName()
   {
      return name;
   }

   @Override
   @SuppressWarnings("unchecked")
   public IMPLTYPE convertedBy(Converter converter)
   {
      this.converter = converter;
      return (IMPLTYPE) this;
   }

   @Override
   public Converter getConverter()
   {
      return converter;
   }

   @Override
   @SuppressWarnings("unchecked")
   public IMPLTYPE validatedBy(Validator validator)
   {
      this.validator = validator;
      return (IMPLTYPE) this;
   }

   @Override
   public Validator getValidator()
   {
      return validator;
   }

   @Override
   @SuppressWarnings("unchecked")
   public IMPLTYPE constrainedBy(Constraint constraint)
   {
      this.constraints.add(constraint);
      return (IMPLTYPE) this;
   }

   @Override
   public List> getConstraints()
   {
      return constraints;
   }

   @Override
   @SuppressWarnings("unchecked")
   public IMPLTYPE transposedBy(Transposition transform)
   {
      this.transpositions.add(transform);
      return (IMPLTYPE) this;
   }

   @Override
   public List> getTranspositions()
   {
      return transpositions;
   }

   @Override
   public String toString()
   {
      return "ParameterBuilder [name=\"" + name + "\" -> transpositions=" + transpositions + ", constraints="
               + constraints
               + ", bindings=" + getBindings() + ", converter=" + converter + ", validator=" + validator + "]";
   }

}