/**
* Copyright (c) 2011, SOCIETIES Consortium (WATERFORD INSTITUTE OF TECHNOLOGY (TSSG), HERIOT-WATT UNIVERSITY (HWU), SOLUTA.NET
* (SN), GERMAN AEROSPACE CENTRE (Deutsches Zentrum fuer Luft- und Raumfahrt e.V.) (DLR), Zavod za varnostne tehnologije
* informacijske družbe in elektronsko poslovanje (SETCCE), INSTITUTE OF COMMUNICATION AND COMPUTER SYSTEMS (ICCS), LAKE
* COMMUNICATIONS (LAKE), INTEL PERFORMANCE LEARNING SOLUTIONS LTD (INTEL), PORTUGAL TELECOM INOVAÇÃO, SA (PTIN), IBM Corp.,
* INSTITUT TELECOM (ITSUD), AMITEC DIACHYTI EFYIA PLIROFORIKI KAI EPIKINONIES ETERIA PERIORISMENIS EFTHINIS (AMITEC), TELECOM
* ITALIA S.p.a.(TI), TRIALOG (TRIALOG), Stiftelsen SINTEF (SINTEF), NEC EUROPE LTD (NEC))
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following
* conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.societies.api.context.model;
import java.io.Serializable;
import java.util.Date;
/**
* Base class for representing context model objects. This class defines methods
* for accessing information common to all <code>CtxModelOject</code>
* implementations. More specifically, every context model object can be referenced
* by its {@link CtxIdentifier}. In addition, upon modification of a CtxModelOject
* the last modification time is updated.
*
* @see CtxModelType
* @author <a href="mailto:nicolas.liampotis@cn.ntua.gr">Nicolas Liampotis</a> (ICCS)
* @since 0.0.1
*/
public abstract class CtxModelObject implements Serializable {
private static final long serialVersionUID = 7349640661605024918L;
/** The identifier of this context model object. */
private final CtxIdentifier id;
/** The last modification time of this context model object. */
private Date lastModified = new Date();
/**
* Constructs a CtxModelObject with the specified identifier
*
* @param id
* the identifier of the newly created context model object
*/
CtxModelObject(CtxIdentifier id) {
this.id = id;
}
/**
* Returns the identifier of this context model object
*
* @return the identifier of this context model object
* @see CtxIdentifier
*/
public CtxIdentifier getId(){
return this.id;
}
/**
* Returns the last modification time of this context model object
*
* @return the last modification time of this context model object
*/
public Date getLastModified(){
return this.lastModified;
}
void setLastModified(Date lastModified) {
this.lastModified = lastModified;
}
/**
* Returns the IIdentity String representation of the CSS or CIS where the
* identified context model object is stored
*
* @return the IIdentity String representation of the CSS or CIS where the
* identified context model object is stored
* @see CtxIdentifier#getOwnerId()
*/
public String getOwnerId() {
return this.getId().getOwnerId();
}
/**
* Returns the model type of this context model object, i.e. Entity,
* Attribute or Association
*
* @return the enum constant for the context model type
* @see CtxIdentifier#getModelType()
*/
public CtxModelType getModelType() {
return this.getId().getModelType();
}
/**
* Returns the semantic tag (e.g. "person") of this context model object
*
* @return the semantic tag of this context model object
* @see CtxIdentifier#getType()
*/
public String getType() {
return this.getId().getType();
}
/**
* Returns the numeric part of this context model object identifier
*
* @return the numeric part of this context model object identifier
* @see CtxIdentifier#getObjectNumber()
*/
public Long getObjectNumber() {
return this.getId().getObjectNumber();
}
/**
* Returns a String representation of this context model object.
*
* @return a String representation of this context model object.
* @since 2.0
*/
@Override
public String toString() {
final StringBuilder sb = new StringBuilder();
sb.append(this.getClass().getSimpleName());
sb.append(" {id=");
sb.append(this.id);
sb.append(", lastModified=");
sb.append(this.lastModified);
sb.append("}");
return sb.toString();
}
/**
* @see java.lang.Object#hashCode()
* @since 0.0.2
*/
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result
+ ((this.id == null) ? 0 : this.id.hashCode());
return result;
}
/**
* @see java.lang.Object#equals(java.lang.Object)
* @since 0.0.2
*/
@Override
public boolean equals(Object that) {
if (this == that)
return true;
if (that == null)
return false;
if (this.getClass() != that.getClass())
return false;
CtxModelObject other = (CtxModelObject) that;
if (this.id == null) {
if (other.id != null)
return false;
} else if (!this.id.equals(other.id))
return false;
return true;
}
}