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package bjc.utils.components;
/**
* Generic implementation of a description for a component
*
* @author ben
*
*/
public class ComponentDescription implements IDescribedComponent {
private static void sanityCheckArgs(String name, String author, String description, int version) {
if(name == null)
throw new NullPointerException("Component name can't be null");
else if(version <= 0) throw new IllegalArgumentException("Component version must be greater than 0");
}
/**
* The author of the component
*/
private String author;
/**
* The description of the component
*/
private String description;
/**
* The name of the component
*/
private String name;
/**
* The version of the component
*/
private int version;
/**
* Create a new component description
*
* @param name
* The name of the component
* @param author
* The author of the component
* @param description
* The description of the component
* @param version
* The version of the component
* @throws IllegalArgumentException
* thrown if version is less than 1
*/
public ComponentDescription(String name, String author, String description, int version) {
sanityCheckArgs(name, author, description, version);
this.name = name;
this.author = author;
this.description = description;
this.version = version;
}
@Override
public String getAuthor() {
if(author == null) return IDescribedComponent.super.getAuthor();
return author;
}
@Override
public String getDescription() {
if(description == null) return IDescribedComponent.super.getDescription();
return description;
}
@Override
public String getName() {
return name;
}
@Override
public int getVersion() {
return version;
}
@Override
public String toString() {
return name + " component v" + version + ", written by " + author;
}
/*
* (non-Javadoc)
*
* @see java.lang.Object#hashCode()
*/
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((author == null) ? 0 : author.hashCode());
result = prime * result + ((description == null) ? 0 : description.hashCode());
result = prime * result + ((name == null) ? 0 : name.hashCode());
result = prime * result + version;
return result;
}
/*
* (non-Javadoc)
*
* @see java.lang.Object#equals(java.lang.Object)
*/
@Override
public boolean equals(Object obj) {
if(this == obj) return true;
if(obj == null) return false;
if(getClass() != obj.getClass()) return false;
ComponentDescription other = (ComponentDescription) obj;
if(author == null) {
if(other.author != null) return false;
} else if(!author.equals(other.author)) return false;
if(description == null) {
if(other.description != null) return false;
} else if(!description.equals(other.description)) return false;
if(name == null) {
if(other.name != null) return false;
} else if(!name.equals(other.name)) return false;
if(version != other.version) return false;
return true;
}
}
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