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    signals: (IOException);
 </jml></pre></DL>
</DD>
</DL>
<HR>

<A NAME="setSource(java.io.InputStream)"><!-- --></A><H3>
setSource</H3>
<PRE>
public void <B>setSource</B>(java.io.InputStream&nbsp;input)
               throws java.io.IOException</PRE>
<DL>
<DD>Resets the Loader object and sets the source of the data set to be 
 the supplied InputStream.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>input</CODE> - the source InputStream
<DT><B>Throws:</B>
<DD><CODE>java.io.IOException</CODE> - if this Loader doesn't
 support loading from a File.</DL>
</DD>
</DL>
<HR>

<A NAME="getStructure()"><!-- --></A><H3>
getStructure</H3>
<PRE>
public <A HREF="../../../weka/core/Instances.html" title="class in weka.core">Instances</A> <B>getStructure</B>()
                       throws java.io.IOException</PRE>
<DL>
<DD>Determines and returns (if possible) the structure (internally the 
 header) of the data set as an empty set of instances.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the structure of the data set as an empty set of Instances
<DT><B>Throws:</B>
<DD><CODE>java.io.IOException</CODE> - if there is no source or parsing fails

 <pre><jml>
    public_normal_behavior
      requires: model_sourceSupplied == true
                && model_structureDetermined == false
                && (* successful parse *);
      modifiable: model_structureDetermined;
      ensures: \result != null
               && \result.numInstances() == 0
               && model_structureDetermined == true;
  also
    public_exceptional_behavior
      requires: model_sourceSupplied == false
                || (* unsuccessful parse *);
      signals: (IOException);
 </jml></pre></DL>
</DD>
</DL>
<HR>

<A NAME="getDataSet()"><!-- --></A><H3>
getDataSet</H3>
<PRE>
public <A HREF="../../../weka/core/Instances.html" title="class in weka.core">Instances</A> <B>getDataSet</B>()
                     throws java.io.IOException</PRE>
<DL>
<DD>Return the full data set. If the structure hasn't yet been determined
 by a call to getStructure then the method should do so before processing
 the rest of the data set.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the full data set as an Instances object
<DT><B>Throws:</B>
<DD><CODE>java.io.IOException</CODE> - if there is an error during parsing or if 
 getNextInstance has been called on this source (either incremental
 or batch loading can be used, not both).

 <pre><jml>
    public_normal_behavior
      requires: model_sourceSupplied == true
                && (* successful parse *);
      modifiable: model_structureDetermined;
      ensures: \result != null
               && \result.numInstances() >= 0
               && model_structureDetermined == true;
  also
    public_exceptional_behavior
      requires: model_sourceSupplied == false
                || (* unsuccessful parse *);
      signals: (IOException);
 </jml></pre></DL>
</DD>
</DL>
<HR>

<A NAME="getNextInstance()"><!-- --></A><H3>
getNextInstance</H3>
<PRE>
public <A HREF="../../../weka/core/Instance.html" title="class in weka.core">Instance</A> <B>getNextInstance</B>()
                         throws java.io.IOException</PRE>
<DL>
<DD>Read the data set incrementally---get the next instance in the data 
 set or returns null if there are no
 more instances to get. If the structure hasn't yet been 
 determined by a call to getStructure then method should do so before
 returning the next instance in the data set.

 If it is not possible to read the data set incrementally (ie. in cases
 where the data set structure cannot be fully established before all
 instances have been seen) then an exception should be thrown.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the next instance in the data set as an Instance object or null
 if there are no more instances to be read
<DT><B>Throws:</B>
<DD><CODE>java.io.IOException</CODE> - if there is an error during parsing or if
 getDataSet has been called on this source (either incremental
 or batch loading can be used, not both).

 <pre><jml>
    public_normal_behavior
    {|
       requires: model_sourceSupplied == true
                 && (* successful parse *);
       modifiable: model_structureDetermined;
       ensures: model_structureDetermined == true
                && \result != null;
     also
       requires: model_sourceSupplied == true
                 && (* no further input *);
       modifiable: model_structureDetermined;
       ensures: model_structureDetermined == true
                && \result == null;
    |}
  also
    public_exceptional_behavior
    {|
       requires: model_sourceSupplied == false
                 || (* unsuccessful parse *);
       signals: (IOException);
     also
       requires: (* unable to process data set incrementally *);
       signals: (IOException);
    |}
 </jml></pre></DL>
</DD>
</DL>
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