package org.kuali.rice.krms.api.repository.proposition;

 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.apache.commons.lang.builder.EqualsBuilder;

 import org.apache.commons.lang.builder.HashCodeBuilder;

 import org.apache.commons.lang.builder.ToStringBuilder;

 import org.kuali.rice.core.api.CoreConstants;

 import org.kuali.rice.core.api.mo.ModelBuilder;

 import org.kuali.rice.core.api.mo.ModelObjectComplete;

 /**

  * Concrete model object implementation of KRMS Proposition Parameter 

  * immutable. 

  * Instances of PropositionParameter can be (un)marshalled to and from XML.

  *

  * @see PropositionParameterContract

  */

 @XmlRootElement(name = PropositionParameter.Constants.ROOT_ELEMENT_NAME)

 @XmlAccessorType(XmlAccessType.NONE)

 @XmlType(name = PropositionParameter.Constants.TYPE_NAME, propOrder = {

                 PropositionParameter.Elements.ID,

                 PropositionParameter.Elements.PROP_ID,

                 PropositionParameter.Elements.VALUE,

                 PropositionParameter.Elements.PARM_TYPE,

                 PropositionParameter.Elements.SEQUENCE,

         CoreConstants.CommonElements.VERSION_NUMBER,

                 CoreConstants.CommonElements.FUTURE_ELEMENTS

 })

 public final class PropositionParameter implements PropositionParameterContract, ModelObjectComplete{

         private static final long serialVersionUID = 2783959459503209577L;

         @XmlElement(name = Elements.ID, required=true)

         private String id;

         @XmlElement(name = Elements.PROP_ID, required=true)

         private String propId;

         @XmlElement(name = Elements.VALUE, required=true)

         private String value;

         @XmlElement(name = Elements.PARM_TYPE, required=true)

         private String parameterType;

         @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<org.w3c.dom.Element> _futureElements = null;

          /** 

      * This constructor should never be called.  

      * It is only present for use during JAXB unmarshalling. 

      */

     private PropositionParameter() {

             this.id = null;

             this.propId = null;

             this.value = null;

             this.parameterType = null;

             this.sequenceNumber = null;

         this.versionNumber = null;

     }

     /**

          * Constructs a PropositionParameter from the given builder.  

          * This constructor is private and should only ever be invoked from the builder.

          * 

          * @param builder the Builder from which to construct the PropositionParameter

          */

     private PropositionParameter(Builder builder) {

         this.id = builder.getId();

         this.propId = builder.getPropId();

         this.value = builder.getValue();

         this.parameterType = builder.getParameterType();

         this.sequenceNumber = builder.getSequenceNumber();

         this.versionNumber = builder.getVersionNumber();

     }

         @Override

         public String getId() {

                 return this.id;

         }

         @Override

         public String getPropId() {

                 return this.propId;

         }

         @Override

         public String getValue() {

                 return this.value;

         }

         @Override

         public String getParameterType() {

                 return this.parameterType;

         }

         @Override

         public Integer getSequenceNumber() {

                 return this.sequenceNumber; 

         }

     @Override

     public Long getVersionNumber() {

         return versionNumber;

     }

         /**

      * This builder is used to construct instances of PropositionParameter.  

      * It enforces the constraints of the {@link PropositionParameterContract}.

      */

     public static class Builder implements PropositionParameterContract, ModelBuilder, Serializable {

             private static final long serialVersionUID = -6889320709850568900L;

                 private String id;

         private String propId;

         private String value;

         private String parameterType;

         private Integer sequenceNumber;

         private Long versionNumber;

         private PropositionDefinition.Builder proposition;

                 /**

                  * Private constructor for creating a builder with all of it's required attributes.

                  */

         private Builder(String id, String propId, String value, String parameterType, Integer sequenceNumber) {

             setId(id);

             setPropId(propId);

             setValue(value);

             setParameterType(parameterType);

                         setSequenceNumber(sequenceNumber);

         }

         public static Builder create(String id, String propId, String value, String parameterType, Integer sequenceNumber) {

                 return new Builder(id, propId, value, parameterType, sequenceNumber);

         }

         /**

          * Creates a builder by populating it with data from the given {@link PropositionParameterContract}.

          * 

          * @param contract the contract from which to populate this builder

          * @return an instance of the builder populated with data from the contract

          */

         public static Builder create(PropositionParameterContract contract) {

                 if (contract == null) {

                 throw new IllegalArgumentException("contract is null");

             }

             Builder builder =  new Builder(contract.getId(), contract.getPropId(), contract.getValue(), contract.getParameterType(), contract.getSequenceNumber());

             builder.setVersionNumber(contract.getVersionNumber());

             return builder;

         }

                 /**

                  * Sets the value of the id on this builder to the given value.

                  * 

                  * @param id the id value to set, must not be null or blank

                  * @throws IllegalArgumentException if the id is null or blank

                  */

         public void setId(String id) {

             if (id != null && StringUtils.isBlank(id)) {

                 throw new IllegalArgumentException("id is blank");

             }

             this.id = id;

         }

                 public void setPropId(String propId) {

                     // have to be able to create it with a null propId for chicken/egg reasons.

             if (null != propId && StringUtils.isBlank(propId)) {

                 throw new IllegalArgumentException("propId must be null or non-blank");

             }

                         this.propId = propId;

                 }

                 public void setValue(String value) {

                         // TODO:  isBlank  or is null ???

             if (StringUtils.isBlank(value)) {

                 throw new IllegalArgumentException("value is blank");

             }

                         this.value = value;

                 }

                 public void setParameterType(String parameterType) {

                         if (StringUtils.isBlank(parameterType)){

                         throw new IllegalArgumentException("parameter type is null or blank");

                         }

                         if (!PropositionParameterType.VALID_TYPE_CODES.contains(parameterType)){

                 throw new IllegalArgumentException("parameter type is invalid");                                

                         }

                         // TODO: check against valid values

                         this.parameterType = parameterType;

                 }

                 public void setSequenceNumber(Integer sequenceNumber) {

                         if (sequenceNumber == null) {

                 throw new IllegalArgumentException("parameter type is blank");                                

                         }

                         this.sequenceNumber = sequenceNumber;

                 }

                 public void setProposition(PropositionDefinition.Builder proposition) {

                     if (proposition != null && !StringUtils.isBlank(proposition.getId())) {

                         setPropId(proposition.getId());

                     }

                     this.proposition = proposition;

                 }

         public void setVersionNumber(Long versionNumber){

             this.versionNumber = versionNumber;

         }

                 @Override

                 public String getId() {

                         return id;

                 }

                 @Override

                 public String getPropId() {

                         return propId;

                 }

                 @Override

                 public String getValue() {

                         return value;

                 }

                 @Override

                 public String getParameterType() {

                         return parameterType;

                 }

                 @Override

                 public Integer getSequenceNumber() {

                         return sequenceNumber;

                 }

         @Override

         public Long getVersionNumber() {

             return versionNumber;

         }

                 /**

                  * Builds an instance of a PropositionParameter based on the current state of the builder.

                  * 

                  * @return the fully-constructed PropositionParameter

                  */

         @Override

         public PropositionParameter build() {

             if (proposition == null && StringUtils.isBlank(propId)) {

                 throw new IllegalStateException("either proposition must be non-null or propId must be non-blank");

             }

             return new PropositionParameter(this);

         }

     }

         @Override

         public int hashCode() {

                 return HashCodeBuilder.reflectionHashCode(this, Constants.HASH_CODE_EQUALS_EXCLUDE);

         }

         @Override

         public boolean equals(Object obj) {

                 return EqualsBuilder.reflectionEquals(obj, this, Constants.HASH_CODE_EQUALS_EXCLUDE);

         }

         @Override

         public String toString() {

                 return ToStringBuilder.reflectionToString(this);

         }

         /**

          * Defines some internal constants used on this class.

          */

         static class Constants {

                 final static String ROOT_ELEMENT_NAME = "PropositionParameter";

                 final static String TYPE_NAME = "PropositionParameterType";

                 final static String[] HASH_CODE_EQUALS_EXCLUDE = { CoreConstants.CommonElements.FUTURE_ELEMENTS };

         }

         /**

          * A private class which exposes constants which define the XML element names to use

          * when this object is marshalled to XML.

          */

         public static class Elements {

                 final static String ID = "id";

                 final static String PROP_ID = "propId";

                 final static String VALUE = "value";

                 final static String PARM_TYPE = "parameterType";

                 final static String SEQUENCE = "sequenceNumber";

         }

 }