/*
    * Copyright 2011 The Kuali Foundation
    *
    * Licensed under the Educational Community License, Version 1.0 (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/ecl1.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.term;
  
  import java.io.Serializable;
  import java.util.Collection;
  import java.util.List;
  
  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.XmlElementWrapper;
  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.jdom.IllegalAddException;
  import org.kuali.rice.core.api.CoreConstants;
  import org.kuali.rice.core.api.mo.ModelBuilder;
  import org.kuali.rice.core.api.mo.ModelObjectComplete;
  import org.kuali.rice.krms.api.repository.BuilderUtils;
  
  /**
   * Immutable DTO for Terms.  Construction must be done via the {@link Builder} inner class.
   * 
   * @author Kuali Rice Team (rice.collab@kuali.org)
   *
   */
  @XmlRootElement(name = TermDefinition.Constants.ROOT_ELEMENT_NAME)
  @XmlAccessorType(XmlAccessType.NONE)
  @XmlType(name = TermDefinition.Constants.TYPE_NAME, propOrder = {
  		TermDefinition.Elements.ID,
  		TermDefinition.Elements.SPECIFICATION,
  		TermDefinition.Elements.PARAMETERS,
          CoreConstants.CommonElements.VERSION_NUMBER,
  		CoreConstants.CommonElements.FUTURE_ELEMENTS
  })
  public final class TermDefinition implements TermDefinitionContract, ModelObjectComplete {
  	
  	private static final long serialVersionUID = 1L;
  	
  	@XmlElement(name = Elements.ID, required=false)
  	private final String id;
  	@XmlElement(name = Elements.SPECIFICATION, required=true)
  	private final TermSpecificationDefinition specification;
  	@XmlElementWrapper(name = Elements.PARAMETERS, required=false)
  	@XmlElement(name = "parameter", required=false)
  	private final List<TermParameterDefinition> parameters;
      @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 is for JAXB only.  Do not invoke directly.
  	 */
  	private TermDefinition() {
  		id = null;
  		specification = null;
  		parameters = null;
          versionNumber = null;
  	}
  	
  	private TermDefinition(Builder builder) {
  		id = builder.getId();
  		specification = builder.getSpecification().build();
  		parameters = BuilderUtils.convertFromBuilderList(builder.getParameters());
  		versionNumber = builder.getVersionNumber();
  	}
  	
  	/**
  	 * {@link ModelBuilder} for {@link TermDefinition}s.
  	 * 
  	 * @author Kuali Rice Team (rice.collab@kuali.org)
  	 *
  	 */
  	public static class Builder implements TermDefinitionContract, ModelBuilder, Serializable {
  		
  		private static final long serialVersionUID = 1L;
  		
 		private String id;
 		private TermSpecificationDefinition.Builder specification;
 		private List<TermParameterDefinition.Builder> parameters;
         private Long versionNumber;
 		
 		private Builder(String id, TermSpecificationDefinition.Builder termSpecificationDefinition, 
 				List<TermParameterDefinition.Builder> termParameters) {
 			setId(id);
 			setSpecification(termSpecificationDefinition);
 			setParameters(termParameters);
 		}
 
 		/**
 		 * static factory for creating a {@link Builder}.
 		 * 
 		 * @param id may be null.
 		 * @param termSpecification must not be null.
 		 * @param termParameters may be null.
 		 */
 		public static Builder create(String id, TermSpecificationDefinition.Builder termSpecification, 
 				List<TermParameterDefinition.Builder> termParameters) {
 			return new Builder(id, termSpecification, termParameters);
 		}
 		
 		/**
 		 * static factory for creating a {@link Builder} from a {@link TermDefinitionContract}.
 		 * 
 		 * @param term must be non-null.
 		 */
 		public static Builder create(TermDefinitionContract term) {
 			if (term == null) throw new IllegalAddException("term may not be null");
 			
 			// Convert TermParameterDefinitionContract to TermParameterDefinition:
 			List<TermParameterDefinition.Builder> outParams =
 				BuilderUtils.transform(term.getParameters(), TermParameterDefinition.Builder.toBuilder);
 
 			Builder builder = create(term.getId(), 
 					// doing my TermSpecificationDefinitionContract conversion inline:
 					TermSpecificationDefinition.Builder.create(term.getSpecification()),
 					// this is made immutable in the setter
 					outParams 
 					);
 			builder.setVersionNumber(term.getVersionNumber());
 			return builder;
 		}
 		
 		// Builder setters:
 		
 		/**
 		 * @param id the id to set.  Should be null to build {@link TermDefinition}s for creation operations.
 		 * @throws IllegalArgumentException if the id is non-null and only contains whitespace
 		 */
 		public void setId(String id) {
 			if (id != null && StringUtils.isBlank(id)) {
 				throw new IllegalArgumentException("id must contain non-whitespace chars");
 			}
 			this.id = id;
 		}
 		
 		/**
 		 * @param termSpecification the termSpecification to set
 		 * @throws IllegalArgumentException if termSpecification is null
 		 */
 		public void setSpecification(TermSpecificationDefinition.Builder termSpecification) {
 			if (termSpecification == null) {
 				throw new IllegalArgumentException("termSpecification must not be null");
 			}
 			this.specification = termSpecification;
 		}
 		
 		/**
 		 * @param parameters the termParameters to set.  May be null, or empty.
 		 */
 		public void setParameters(List<TermParameterDefinition.Builder> parameters) {
 			this.parameters = parameters;
 		}
 
 		/**
 		 * @param versionNumber the versionNumber to set.  May be null.
 		 */
         public void setVersionNumber(Long versionNumber){
             this.versionNumber = versionNumber;
         }
         
 		// Builder getters:
 		
 		/**
 		 * @return the id
 		 */
 		@Override
 		public String getId() {
 			return id;
 		}
 
 		/**
 		 * @return the termSpecification
 		 */
 		@Override
 		public TermSpecificationDefinition.Builder getSpecification() {
 			return specification;
 		}
 		
 		
 
 		/**
 		 * @return the termParameters
 		 */
 		@Override
 		public List<TermParameterDefinition.Builder> getParameters() {
 			return parameters;
 		}
 		
 		/**
 		 * @return the version number
 		 */
         @Override
         public Long getVersionNumber() {
             return this.versionNumber;
         }
         
 		/**
 		 * Builds the {@link TermDefinition}, or dies trying.
 		 * 
 		 * @see org.kuali.rice.core.api.mo.ModelBuilder#build()
 		 * @throws IllegalStateException if builder validation fails
 		 */
 		@Override
 		public TermDefinition build() {
 			return new TermDefinition(this);
 		}
 	}
 	
 	/**
 	 * @return the termId.  May be null if this {@link TermDefinition} hasn't been persisted.
 	 */
 	@Override
 	public String getId() {
 		return this.id;
 	}
 	/**
 	 * @return the specification.  Will never be null.
 	 */
 	@Override
 	public TermSpecificationDefinition getSpecification() {
 		return this.specification;
 	}
 	/**
 	 * @return the parameters.  May be empty, but will never be null.
 	 */
 	@Override
 	public List<TermParameterDefinition> getParameters() {
 		return this.parameters;
 	}
 	
 	/**
 	 * @see org.kuali.rice.core.api.mo.common.Versioned#getVersionNumber()
 	 */
     @Override
     public Long getVersionNumber() {
         return versionNumber;
     }
 
     /**
 	 * @see java.lang.Object#hashCode()
 	 */
 	@Override
 	public int hashCode() {
 		return HashCodeBuilder.reflectionHashCode(this, Constants.HASH_CODE_EQUALS_EXCLUDE);
 	}
 	
 	/**
 	 * @see java.lang.Object#equals(java.lang.Object)
 	 */
 	@Override
 	public boolean equals(Object obj) {
 		if (obj == null) return false;
 		return EqualsBuilder.reflectionEquals(this, obj, Constants.HASH_CODE_EQUALS_EXCLUDE);
 	}
 	
 	/**
 	 * @see java.lang.Object#toString()
 	 */
 	@Override
 	public String toString() {
 		return ToStringBuilder.reflectionToString(this);
 	}
 
 	static class Constants {
 		public static final String ROOT_ELEMENT_NAME = "termDefinition";
 		public static final String TYPE_NAME = "termDefinitionType";
 		final static String[] HASH_CODE_EQUALS_EXCLUDE = { CoreConstants.CommonElements.FUTURE_ELEMENTS };
 	}
 
 	static class Elements {
 		public static final String ID = "id";
 		public static final String SPECIFICATION = "specification";
 		public static final String PARAMETERS = "parameters";
 	}
 	
 	
 }