/**
    * Copyright 2005-2012 The Kuali Foundation
    *
    * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php
    *
   * 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.kuali.rice.krms.api.repository.function;
  
  import java.io.Serializable;
  import java.util.Collection;
  
  import javax.xml.bind.annotation.XmlAccessType;
  import javax.xml.bind.annotation.XmlAccessorType;
  import javax.xml.bind.annotation.XmlAnyElement;
  import javax.xml.bind.annotation.XmlElement;
  import javax.xml.bind.annotation.XmlRootElement;
  import javax.xml.bind.annotation.XmlType;
  
  import org.apache.commons.lang.StringUtils;
  import org.kuali.rice.core.api.CoreConstants;
  import org.kuali.rice.core.api.mo.AbstractDataTransferObject;
  import org.kuali.rice.core.api.mo.ModelBuilder;
  import org.w3c.dom.Element;
  
  /**
   * An immutable representation of a function parameter definition.
   * 
   * @see FunctionParameterDefinitionContract
   * 
   * @author Kuali Rice Team (rice.collab@kuali.org)
   *
   */
  @XmlRootElement(name = FunctionParameterDefinition.Constants.ROOT_ELEMENT_NAME)
  @XmlAccessorType(XmlAccessType.NONE)
  @XmlType(name = FunctionParameterDefinition.Constants.TYPE_NAME, propOrder = {
  		FunctionParameterDefinition.Elements.ID,
  		FunctionParameterDefinition.Elements.NAME,
  		FunctionParameterDefinition.Elements.DESCRIPTION,
  		FunctionParameterDefinition.Elements.PARAMETER_TYPE,
  		FunctionParameterDefinition.Elements.SEQUENCE,
  		FunctionParameterDefinition.Elements.FUNCTION_ID,
          CoreConstants.CommonElements.VERSION_NUMBER,
          CoreConstants.CommonElements.FUTURE_ELEMENTS
  })
  public class FunctionParameterDefinition extends AbstractDataTransferObject implements FunctionParameterDefinitionContract {
  
  	private static final long serialVersionUID = 1391030685309770560L;
  
  	@XmlElement(name = Elements.ID, required = false)
  	private final String id;
  		
  	@XmlElement(name = Elements.NAME, required = true)
  	private final String name;
  	
  	@XmlElement(name = Elements.DESCRIPTION, required = false)
  	private final String description;
  	
  	@XmlElement(name = Elements.TYPE, required = true)
  	private final String parameterType;
  	
  	@XmlElement(name = Elements.FUNCTION_ID, required = true)
  	private final String functionId;
  	
  	@XmlElement(name = Elements.SEQUENCE, required=true)
  	private Integer sequenceNumber;
  
  	@XmlElement(name = CoreConstants.CommonElements.VERSION_NUMBER, required = false)
  	private final Long versionNumber;
  	
  	@SuppressWarnings("unused")
      @XmlAnyElement
      private final Collection<Element> _futureElements = null;
  	
  	/**
       * Private constructor used only by JAXB.
       */
      private FunctionParameterDefinition() {
      	this.id = null;
      	this.name = null;
      	this.description = null;
      	this.parameterType = null;
      	this.functionId = null;
      	this.sequenceNumber = null;
      	this.versionNumber = null;
      }
      
      private FunctionParameterDefinition(Builder builder) {
      	this.id = builder.getId();
      	this.name = builder.getName();
      	this.description = builder.getDescription();
     	this.parameterType = builder.getParameterType();
     	this.functionId = builder.getFunctionId();
     	this.sequenceNumber = builder.getSequenceNumber();
     	this.versionNumber = builder.getVersionNumber();
     }
     
 	@Override
 	public String getId() {
 		return id;
 	}
 
 	@Override
 	public String getName() {
 		return name;
 	}
 
 	@Override
 	public String getDescription() {
 		return description;
 	}
 	
 	@Override
 	public String getParameterType() {
 		return parameterType;
 	}
 	
 	@Override
 	public String getFunctionId() {
 		return functionId;
 	}
 	
 	@Override
 	public Long getVersionNumber() {
 		return versionNumber;
 	}
 
 	@Override
 	public Integer getSequenceNumber() {
 		return sequenceNumber;
 	}
 
 	/**
 	 * A builder which can be used to construct {@link FunctionParameterDefinition}
 	 * instances.  Enforces the constraints of the {@link FunctionParameterDefinitionContract}.
 	 * 
 	 * @author Kuali Rice Team (rice.collab@kuali.org)
 	 *
 	 */
 	public static final class Builder implements FunctionParameterDefinitionContract, ModelBuilder, Serializable  {
     	    	
     	private static final long serialVersionUID = -4470376239998290245L;
     	
 		private String id;
     	private String name;
     	private String description;
     	private String functionId;
     	private String parameterType;
     	private Integer sequenceNumber;
     	private Long versionNumber;
     	
         private Builder(String name, String type, Integer sequenceNumber) {
         	setName(name);
         	setParameterType(type);
         	setSequenceNumber(sequenceNumber);
         }
         
         /**
          * Creates a function parameter definition builder with the given required values.  This builder
          * is the only means by which a {@link FunctionParameterDefinition} object should be created.
          * 
          * @param name the name of the function parameter definition to create, must not be null or blank
          * @param type the type of the function parameter definition to create, must not be null or blank
          * 
          * @return a builder with the required values already initialized
          * 
          * @throws IllegalArgumentException if any of the given arguments is null or blank
          */
         public static Builder create(String name, String type, Integer sequenceNumber) {
         	return new Builder(name, type, sequenceNumber);
         }
         
         /**
          * Creates and populates a builder with the data on the given {@link FunctionParameterDefinitionContract}.
          * This is similar in nature to a "copy constructor" for {@link FunctionParameterDefinition}.
          * 
          * @param contract an object implementing the {@link FunctionParameterDefinitionContract} from which
          * to copy property values
          *  
          * @return a builder with the values from the contract already initialized
          * 
          * @throws IllegalArgumentException if the given contract is null
          */
         public static Builder create(FunctionParameterDefinitionContract contract) {
         	if (contract == null) {
         		throw new IllegalArgumentException("contract was null");
         	}
         	Builder builder = create(contract.getName(), contract.getParameterType(), contract.getSequenceNumber());
         	builder.setId(contract.getId());
         	builder.setDescription(contract.getDescription());
         	builder.setParameterType(contract.getParameterType());
         	builder.setFunctionId(contract.getFunctionId());
         	builder.setVersionNumber(contract.getVersionNumber());
         	return builder;
         }
 
         @Override
         public FunctionParameterDefinition build() {
         	return new FunctionParameterDefinition(this);
         }
         
         @Override
 		public String getId() {
 			return this.id;
 		}
 
         /**
          * Sets the id for the function parameter definition that will be returned by this builder.
          * 
          * @param id the function parameter definition id to set
          */
 		public void setId(String id) {
 			this.id = id;
 		}
 
 		@Override
 		public String getName() {
 			return this.name;
 		}
 
 		/**
          * Sets the name for the function parameter definition that will be returned by this builder.
          * The name must not be null or blank.
          * 
          * @param name the name to set on this builder, must not be null or blank
          */
 		public void setName(String name) {
 			if (StringUtils.isBlank(name)) {
 				throw new IllegalArgumentException("name was blank");
 			}
 			this.name = name;
 		}
 		
 		@Override
 		public String getDescription() {
 			return this.description;
 		}
 
         /**
          * Sets the description for the function parameter definition that will be returned by this builder.
          * 
          * @param description the description to set on this builder
          */
 		public void setDescription(String description) {
 			this.description = description;
 		}
 
 		@Override
 		public String getParameterType() {
 			return this.parameterType;
 		}
 
 		/**
          * Sets the type for the function parameter definition that will be
          * returned by this builder.  This can be one of a set of "built-in"
          * data types or a custom datatype represented as a fully qualified
          * java class name.  The type must not be null or blank.
          * 
          * @param type the type to set on this builder, must not be null or blank
          */
 		public void setParameterType(String type) {
 			if (StringUtils.isBlank(type)) {
 				throw new IllegalArgumentException("type was blank");
 			}
 			this.parameterType = type;
 		}
 
 		@Override
 		public String getFunctionId() {
 			return this.functionId;
 		}
 
 		/**
          * Sets the type for the function id
          * If provided, the function id must be non-blank.
          * Must allow id to be null, to prevent chicken/egg problems.
          * 
          * @param type the type to set on this builder, must be either null or non-blank
          */
 		public void setFunctionId(String functionId) {
 			if (functionId != null && StringUtils.isBlank(functionId)) {
 				throw new IllegalArgumentException("functionId must be null or non-blank");
 			}
 			this.functionId = functionId;
 		}
 
 		@Override
 		public Integer getSequenceNumber() {
 			return this.sequenceNumber;
 		}
 
 		/**
          * Sets the sequence number for the function parameter definition that
          * will be returned by this builder. This is the position in the functions
          * parameter list.
          * 
          * @param sequenceNumber the position of the parameter in the function parameter list
          */
 		public void setSequenceNumber(Integer sequenceNumber) {
 			this.sequenceNumber = sequenceNumber;
 		}
 
 		@Override
 		public Long getVersionNumber() {
 			return this.versionNumber;
 		}
 
 		/**
          * Sets the version number for the function parameter definition that
          * will be returned by this builder.
          * 
          * <p>In general, this value should not be manually set on the builder,
          * but rather copied from an existing {@link FunctionParameterDefinitionContract} when
          * invoking {@link Builder#create(FunctionParameterDefinitionContract)}.
          * 
          * @param versionNumber the version number to set
          */
 		public void setVersionNumber(Long versionNumber) {
 			this.versionNumber = versionNumber;
 		}
 
 	}
 	
 	/**
      * Defines some internal constants used on this class.
      */
     static class Constants {
         final static String ROOT_ELEMENT_NAME = "functionParameter";
         final static String TYPE_NAME = "FunctionParameterType";
     }
 
     /**
      * A private class which exposes constants which define the XML element names to use
      * when this object is marshalled to XML.
      */
     static class Elements {
         final static String ID = "id";
         final static String NAME = "name";
         final static String DESCRIPTION = "description";
         final static String PARAMETER_TYPE = "parameterType";
         final static String TYPE = "type";
         final static String FUNCTION_ID = "functionId";
 		final static String SEQUENCE = "sequenceNumber";
     }
     
 }