/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.ambari.server.orm.entities;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.NamedQueries;
import javax.persistence.NamedQuery;
import javax.persistence.OneToOne;
import javax.persistence.Table;
import javax.persistence.TableGenerator;
import javax.persistence.UniqueConstraint;
/**
* The {@link ExtensionLinkEntity} class is used to model the extensions linked to the stack.
*
* An extension version is like a stack version but it contains custom services. Linking an extension
* version to the current stack version allows the cluster to install the custom services contained in
* the extension version.
*/
@Table(name = "extensionlink", uniqueConstraints = @UniqueConstraint(columnNames = {
"stack_id", "extension_id" }))
@TableGenerator(name = "link_id_generator", table = "ambari_sequences", pkColumnName = "sequence_name", valueColumnName = "sequence_value", pkColumnValue = "link_id_seq", initialValue = 0)
@NamedQueries({
@NamedQuery(name = "ExtensionLinkEntity.findAll", query = "SELECT link FROM ExtensionLinkEntity link"),
@NamedQuery(name = "ExtensionLinkEntity.findByStackAndExtensionName", query = "SELECT link FROM ExtensionLinkEntity link WHERE link.stack.stackName = :stackName AND link.stack.stackVersion = :stackVersion AND link.extension.extensionName = :extensionName"),
@NamedQuery(name = "ExtensionLinkEntity.findByStackAndExtension", query = "SELECT link FROM ExtensionLinkEntity link WHERE link.stack.stackName = :stackName AND link.stack.stackVersion = :stackVersion AND link.extension.extensionName = :extensionName AND link.extension.extensionVersion = :extensionVersion"),
@NamedQuery(name = "ExtensionLinkEntity.findByStack", query = "SELECT link FROM ExtensionLinkEntity link WHERE link.stack.stackName = :stackName AND link.stack.stackVersion = :stackVersion"),
@NamedQuery(name = "ExtensionLinkEntity.findByExtension", query = "SELECT link FROM ExtensionLinkEntity link WHERE link.extension.extensionName = :extensionName AND link.extension.extensionVersion = :extensionVersion") })
@Entity
public class ExtensionLinkEntity {
@Id
@GeneratedValue(strategy = GenerationType.TABLE, generator = "link_id_generator")
@Column(name = "link_id", nullable = false, updatable = false)
private Long linkId;
@OneToOne
@JoinColumn(name = "stack_id", unique = false, nullable = false, insertable = true, updatable = false)
private StackEntity stack;
@OneToOne
@JoinColumn(name = "extension_id", unique = false, nullable = false, insertable = true, updatable = false)
private ExtensionEntity extension;
/**
* Constructor.
*/
public ExtensionLinkEntity() {
}
public Long getLinkId() {
return linkId;
}
public void setLinkId(Long linkId) {
this.linkId = linkId;
}
public StackEntity getStack() {
return stack;
}
public void setStack(StackEntity stack) {
this.stack = stack;
}
public ExtensionEntity getExtension() {
return extension;
}
public void setExtension(ExtensionEntity extension) {
this.extension = extension;
}
/**
*
*/
@Override
public boolean equals(Object object) {
if (this == object) {
return true;
}
if (object == null || getClass() != object.getClass()) {
return false;
}
ExtensionLinkEntity that = (ExtensionLinkEntity) object;
if (linkId != null ? !linkId.equals(that.linkId) : that.linkId != null) {
return false;
}
return true;
}
/**
*
*/
@Override
public int hashCode() {
int result = (null != linkId) ? linkId.hashCode() : 0;
return result;
}
/**
* {@inheritDoc}
*/
@Override
public String toString() {
StringBuilder buffer = new StringBuilder();
buffer.append(getClass().getSimpleName());
buffer.append("{");
buffer.append("linkId=").append(linkId);
buffer.append(", stackId=").append(stack.getStackId());
buffer.append(", extensionId=").append(extension.getExtensionId());
buffer.append("}");
return buffer.toString();
}
}