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/*
* 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.tuscany.sca.core.work.impl;
import org.apache.tuscany.sca.work.WorkSchedulerException;
/**
* An identity based immutable implementation of the <code>WorkItem</code>
* interface.
*
* @version $Rev$ $Date$
*/
class WorkItem {
// Id scoped for the VM
private String id;
// Status
private int status = -1;
// Result
private Work<?> result;
// Original work
private Work<?> originalWork;
// Exception
private WorkSchedulerException exception;
/**
* Instantiates an id for this item.
*
* @param id of this work event.
*/
protected WorkItem(final String id, final Work<?> orginalWork) {
this.id = id;
this.originalWork = orginalWork;
}
/**
* Returns the id.
*
* @return Id of this item.
*/
public String getId() {
return id;
}
/**
* Returns the original work.
*
* @return Original work.
*/
public Work<?> getOriginalWork() {
return originalWork;
}
/**
* Returns the work result if the work completed.
*
* @return Work.
* @throws WorkException If the work completed with an exception.
*/
public Work<?> getResult() {
return result;
}
/**
* Sets the result.
*
* @param result Result.
*/
protected void setResult(final Work<?> result) {
this.result = result;
}
/**
* Returns the exception if work completed with an exception.
*
* @return Work exception.
*/
protected WorkSchedulerException getException() {
return exception;
}
/**
* Sets the exception.
*
* @param exception Exception.
*/
protected void setException(final WorkSchedulerException exception) {
this.exception = exception;
}
/**
* Returns the work type based on whether the work was accepted, started,
* rejected or completed.
*
* @return Work status.
*/
public int getStatus() {
return status;
}
/**
* Sets the status.
*
* @param status Status.
*/
protected void setStatus(final int status) {
this.status = status;
}
/**
* @see Object#hashCode()
*/
@Override
public int hashCode() {
return id.hashCode();
}
/**
* Indicates whether some other object is "equal to" this one.
*
* @param obj Object to be compared.
* @return true if this object is the same as the obj argument; false
* otherwise..
*/
@Override
public boolean equals(final Object obj) {
return (obj != null) && (obj.getClass() == WorkItem.class) && ((WorkItem) obj).id.equals(id);
}
/**
* Compares this object with the specified object for order. Returns a
* negative integer, zero, or a positive integer as this object is less
* than, equal to, or greater than the specified object.
*
* @param o Object to be compared.
* @return A negative integer, zero, or a positive integer as this object
* is less than, equal to, or greater than the specified object.
* @throws ClassCastException needs better documentation.
*/
public int compareTo(final Object o) {
if (o.getClass() != WorkItem.class) {
throw new ClassCastException(o.getClass().getName());
} else {
return ((WorkItem) o).getId().compareTo(getId());
}
}
}
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