/*

  * 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.kim.api.permission;

 import com.google.common.collect.Maps;

 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.kuali.rice.core.api.util.jaxb.MapStringStringAdapter;

 import org.kuali.rice.kim.api.common.template.Template;

 import org.w3c.dom.Element;

 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 javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter;

 import java.io.Serializable;

 import java.util.Collection;

 import java.util.Collections;

 import java.util.Map;

 /**

  * An immutable representation of a {@link PermissionContract}.

  *

  * <p>To construct an instance of a Permission, use the {@link Permission.Builder} class.<p/>

  *

  * @see PermissionContract

  */

 @XmlRootElement(name = Permission.Constants.ROOT_ELEMENT_NAME)

 @XmlAccessorType(XmlAccessType.NONE)

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

                 Permission.Elements.ID,

                 Permission.Elements.NAMESPACE_CODE,

                 Permission.Elements.NAME,

                 Permission.Elements.DESCRIPTION,

                 Permission.Elements.TEMPLATE,

         Permission.Elements.ACTIVE,

         Permission.Elements.ATTRIBUTES,

         CoreConstants.CommonElements.VERSION_NUMBER,

         CoreConstants.CommonElements.OBJECT_ID,

         CoreConstants.CommonElements.FUTURE_ELEMENTS

 })

 public final class Permission extends AbstractDataTransferObject implements PermissionContract{

         private static final long serialVersionUID = 1L;

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

     private final String id;

     @XmlElement(name = Permission.Elements.NAMESPACE_CODE, required = true)

     private final String namespaceCode;

     @XmlElement(name = Permission.Elements.NAME, required = true)

     private final String name;

     @XmlElement(name = Permission.Elements.DESCRIPTION, required = false)

     private final String description;

     @XmlElement(name = Permission.Elements.TEMPLATE, required = true)

     private final Template template;

     @XmlElement(name = Permission.Elements.ATTRIBUTES, required = false)

     @XmlJavaTypeAdapter(value = MapStringStringAdapter.class)

     private final Map<String, String> attributes;

     @XmlElement(name = Permission.Elements.ACTIVE, required = false)

     private boolean active;

     @XmlElement(name = CoreConstants.CommonElements.VERSION_NUMBER, required = false)

     private final Long versionNumber;

     @XmlElement(name = CoreConstants.CommonElements.OBJECT_ID, required = false)

     private final String objectId;

     @SuppressWarnings("unused")

     @XmlAnyElement

     private final Collection<Element> _futureElements = null;

     /**

          *  A constructor to be used only by JAXB unmarshalling.

          *

          */

     @SuppressWarnings("unused")

         private Permission() {

                 this.id = null;

         this.namespaceCode = null;

         this.name = null;

         this.description = null;

         this.template = null;

         this.attributes = null;

         this.active = false;

         this.versionNumber = Long.valueOf(1L);

         this.objectId = null;

         }

     /**

          * A constructor using the Builder.

          *

          * @param builder

          */

         private Permission(Builder builder) {

                 this.id = builder.getId();

         this.namespaceCode = builder.getNamespaceCode();

         this.name = builder.getName();

         this.description = builder.getDescription();

         this.template = builder.getTemplate().build();

         this.attributes = builder.getAttributes() != null ? builder.getAttributes() : Collections.<String, String>emptyMap();

         this.active = builder.isActive();

         this.versionNumber = builder.getVersionNumber();

         this.objectId = builder.getObjectId();

         }

         /**

          * @see org.kuali.rice.kim.api.permission.PermissionContract#getId()

          */

         @Override

         public String getId() {

                 return id;

         }

         /**

          * @see org.kuali.rice.kim.api.permission.PermissionContract#getNamespaceCode()

          */

         @Override

         public String getNamespaceCode() {

                 return namespaceCode;

         }

         /**

          * @see org.kuali.rice.kim.api.permission.PermissionContract#getName()

          */

         @Override

         public String getName() {

                 return name;

         }

         /**

          * @see org.kuali.rice.kim.api.permission.PermissionContract#getDescription()

          */

         @Override

         public String getDescription() {

                 return description;

         }

         /**

          * @see org.kuali.rice.kim.api.permission.PermissionContract#getTemplate()

          */

         @Override

         public Template getTemplate() {

                 return template;

         }

         /**

          * @see org.kuali.rice.core.api.mo.common.active.Inactivatable#isActive()

          */

         @Override

         public boolean isActive() {

                 return active;

         }

         /**

          *

          * @see org.kuali.rice.kim.api.permission.PermissionContract#getAttributes()

          */

         @Override

         public Map<String, String> getAttributes() {

                 return this.attributes;

         }

         /**

          * @see org.kuali.rice.core.api.mo.common.Versioned#getVersionNumber()

          */

         @Override

         public Long getVersionNumber() {

                 return versionNumber;

         }

         /**

          * @see org.kuali.rice.core.api.mo.common.GloballyUnique#getObjectId()

          */

         @Override

         public String getObjectId() {

                 return objectId;

         }

     /**

      * This builder constructs a Permission enforcing the constraints of the {@link PermissionContract}.

      */

     public static final class Builder implements PermissionContract, ModelBuilder, Serializable {

         private String id;

         private String namespaceCode;

         private String name;

         private String description;

         private Template.Builder template;

         private Map<String, String> attributes;

         private Long versionNumber = 1L;

         private String objectId;

         private boolean active;

         private Builder(String namespaceCode, String name, Template.Builder template) {

             setNamespaceCode(namespaceCode);

             setName(name);

             setTemplate(template);

         }

         /**

          * Creates a Permission with the required fields.

          */

         public static Builder create(String namespaceCode, String name, Template.Builder template) {

             return new Builder(namespaceCode, name, template);

         }

         /**

          * Creates a Permission from an existing {@link PermissionContract}.

          */

         public static Builder create(PermissionContract contract) {

             Builder builder = new Builder(contract.getNamespaceCode(), contract.getName(), Template.Builder.create(contract.getTemplate()));

             builder.setId(contract.getId());

             builder.setDescription(contract.getDescription());

             if (contract.getAttributes() != null) {

                 builder.setAttributes(contract.getAttributes());

             }

             builder.setActive(contract.isActive());

             builder.setVersionNumber(contract.getVersionNumber());

             builder.setObjectId(contract.getObjectId());

             return builder;

         }

         @Override

         public String getId() {

             return id;

         }

         public void setId(final String id) {

                 this.id = id;

         }

         @Override

         public String getNamespaceCode() {

             return namespaceCode;

         }

         public void setNamespaceCode(final String namespaceCode) {

                 if (StringUtils.isBlank(namespaceCode)) {

                 throw new IllegalArgumentException("namespaceCode is blank");

             }

                 this.namespaceCode = namespaceCode;

         }

         @Override

         public String getName() {

             return name;

         }

         public void setName(final String name) {

                 if (StringUtils.isBlank(name)) {

                 throw new IllegalArgumentException("name is blank");

             }

                 this.name = name;

         }

                 @Override

                 public String getDescription() {

                         return description;

                 }

                 public void setDescription(final String description) {

                         this.description = description;

                 }

                 @Override

                 public Template.Builder getTemplate() {

                         return template;

                 }

                 public void setTemplate(final Template.Builder template) {

                         if (template == null) {

                 throw new IllegalArgumentException("template is null");

             }

                         this.template = template;

                 }

                 @Override

                 public boolean isActive() {

                         return active;

                 }

                 public void setActive(final boolean active) {

             this.active = active;

         }

                 @Override

                 public Long getVersionNumber() {

                         return versionNumber;

                 }

                 public void setVersionNumber(final Long versionNumber) {

                         if (versionNumber == null || versionNumber <= 0) {

                     throw new IllegalArgumentException("versionNumber is invalid");

                 }

                         this.versionNumber = versionNumber;

             }

                 @Override

                 public String getObjectId() {

                         return objectId;

                 }

         public void setObjectId(final String objectId) {

             this.objectId = objectId;

         }

                 @Override

                 public Map<String, String> getAttributes() {

                         return attributes;

                 }

                 public void setAttributes(Map<String, String> attributes) {

             this.attributes = Collections.unmodifiableMap(Maps.newHashMap(attributes));

         }

         @Override

         public Permission build() {

             return new Permission(this);

         }

     }

     /**

      * Defines some internal constants used on this class.

      */

     static class Constants {

         static final String ROOT_ELEMENT_NAME = "permission";

         static final String TYPE_NAME = "PermissionType";

     }

     /**

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

      * when this object is marshalled to XML.

      */

     static class Elements {

         static final String ID = "id";

         static final String NAMESPACE_CODE = "namespaceCode";

         static final String NAME = "name";

         static final String DESCRIPTION = "description";

         static final String TEMPLATE = "template";

         static final String ATTRIBUTES = "attributes";

         static final String ACTIVE = "active";

     }

 }