Package uk.ac.starlink.datanode.factory
Class FileDataNodeBuilder
- java.lang.Object
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- uk.ac.starlink.datanode.factory.DataNodeBuilder
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- uk.ac.starlink.datanode.factory.FileDataNodeBuilder
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public class FileDataNodeBuilder extends DataNodeBuilder
A DataNodeBuilder which tries to build a DataNode from a File object. It examines the file and may invoke a constructor of a DataNode subclass if it knows of one which is likely to be suitable. Rather than trying everything, it will only attempt constructors which it thinks has a good chance of succeeding. Thus, if it works, it will probably be faster than going through the whole list of constructor-based builders. It may also make smarter decisions than doing it that way.
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description DataNode
buildNode(java.lang.Object obj)
Builds a DataNode from a given object.static FileDataNodeBuilder
getInstance()
Obtains the singleton instance of this class.boolean
suitable(java.lang.Class objClass)
Determine whether this builder can be used to work on an object of a given class.java.lang.String
toString()
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Methods inherited from class uk.ac.starlink.datanode.factory.DataNodeBuilder
getBuilders, getNodeClass
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Method Detail
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getInstance
public static FileDataNodeBuilder getInstance()
Obtains the singleton instance of this class.
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suitable
public boolean suitable(java.lang.Class objClass)
Description copied from class:DataNodeBuilder
Determine whether this builder can be used to work on an object of a given class.- Specified by:
suitable
in classDataNodeBuilder
- Parameters:
objClass
- the class of an object which might be passed as the argument of buildNode- Returns:
- whether it's OK to do that
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buildNode
public DataNode buildNode(java.lang.Object obj) throws NoSuchDataException
Description copied from class:DataNodeBuilder
Builds a DataNode from a given object.- Specified by:
buildNode
in classDataNodeBuilder
- Parameters:
obj
- the object to build a datanode from- Returns:
- a new DataNode made from obj
- Throws:
NoSuchDataException
- if no new node can be created
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toString
public java.lang.String toString()
- Overrides:
toString
in classjava.lang.Object
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