graphiterator.html

Geotools是一个开源的Java GIS工具包,可利用它来开发符合标准的地理信息系统。Geotools提供了OGC(Open Geospatial Consortium)规范的一个实现来作为他们的

<DT><B>See Also:</B><DD><A HREF="../../../../org/geotools/graph/traverse/GraphWalker.html" title="interface in org.geotools.graph.traverse"><CODE>GraphWalker</CODE></A>, 
<A HREF="../../../../org/geotools/graph/traverse/GraphTraversal.html" title="interface in org.geotools.graph.traverse"><CODE>GraphTraversal</CODE></A>
<DT><B>Module:</B></DT>
<DD><CODE><B>ext/graph</B></CODE> &nbsp; (<A HREF="http://maven.geotools.fr/repository/org/geotools/gt2-graph/"><CODE>gt2-graph.jar</CODE></A>) (<A HREF="http://maven.geotools.fr/reports/graph/index.html">Maven report</A>) (<A HREF="http://svn.geotools.org/geotools/tags/2.3.2/ext/graph/src/org/geotools/graph/traverse/GraphIterator.java">SVN head</A>)</DD>
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<B>Method Summary</B></FONT></TD>
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<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/geotools/graph/traverse/GraphIterator.html#cont(org.geotools.graph.structure.Graphable, org.geotools.graph.traverse.GraphTraversal)">cont</A></B>(<A HREF="../../../../org/geotools/graph/structure/Graphable.html" title="interface in org.geotools.graph.structure">Graphable</A>&nbsp;current,
     <A HREF="../../../../org/geotools/graph/traverse/GraphTraversal.html" title="interface in org.geotools.graph.traverse">GraphTraversal</A>&nbsp;traversal)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Signals to the iterator that iteration should continue from the current
 component in the traversal.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../../org/geotools/graph/traverse/GraphTraversal.html" title="interface in org.geotools.graph.traverse">GraphTraversal</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/geotools/graph/traverse/GraphIterator.html#getTraversal()">getTraversal</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns the traversal for the iterator.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/geotools/graph/traverse/GraphIterator.html#init(org.geotools.graph.structure.Graph, org.geotools.graph.traverse.GraphTraversal)">init</A></B>(<A HREF="../../../../org/geotools/graph/structure/Graph.html" title="interface in org.geotools.graph.structure">Graph</A>&nbsp;graph,
     <A HREF="../../../../org/geotools/graph/traverse/GraphTraversal.html" title="interface in org.geotools.graph.traverse">GraphTraversal</A>&nbsp;traversal)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Signals to the itereator that iteration is about to begin. </TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/geotools/graph/traverse/GraphIterator.html#killBranch(org.geotools.graph.structure.Graphable, org.geotools.graph.traverse.GraphTraversal)">killBranch</A></B>(<A HREF="../../../../org/geotools/graph/structure/Graphable.html" title="interface in org.geotools.graph.structure">Graphable</A>&nbsp;current,
           <A HREF="../../../../org/geotools/graph/traverse/GraphTraversal.html" title="interface in org.geotools.graph.traverse">GraphTraversal</A>&nbsp;traversal)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Signals the iterator to kill the branch at the current component.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../../org/geotools/graph/structure/Graphable.html" title="interface in org.geotools.graph.structure">Graphable</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/geotools/graph/traverse/GraphIterator.html#next(org.geotools.graph.traverse.GraphTraversal)">next</A></B>(<A HREF="../../../../org/geotools/graph/traverse/GraphTraversal.html" title="interface in org.geotools.graph.traverse">GraphTraversal</A>&nbsp;traversal)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns the next graph component in the iteration. </TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/geotools/graph/traverse/GraphIterator.html#setTraversal(org.geotools.graph.traverse.GraphTraversal)">setTraversal</A></B>(<A HREF="../../../../org/geotools/graph/traverse/GraphTraversal.html" title="interface in org.geotools.graph.traverse">GraphTraversal</A>&nbsp;traversal)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Sets the traversal for the iterator.</TD>
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<B>Method Detail</B></FONT></TD>
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<A NAME="setTraversal(org.geotools.graph.traverse.GraphTraversal)"><!-- --></A><H3>
setTraversal</H3>
<PRE>
public void <B>setTraversal</B>(<A HREF="../../../../org/geotools/graph/traverse/GraphTraversal.html" title="interface in org.geotools.graph.traverse">GraphTraversal</A>&nbsp;traversal)</PRE>
<DL>
<DD>Sets the traversal for the iterator.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>traversal</CODE> - The traversal requesting components from the iterator.</DL>
</DD>
</DL>
<HR>

<A NAME="getTraversal()"><!-- --></A><H3>
getTraversal</H3>
<PRE>
public <A HREF="../../../../org/geotools/graph/traverse/GraphTraversal.html" title="interface in org.geotools.graph.traverse">GraphTraversal</A> <B>getTraversal</B>()</PRE>
<DL>
<DD>Returns the traversal for the iterator.
<P>
<DD><DL>

<DT><B>Returns:</B><DD>The traversal requesting components from the iterator.</DL>
</DD>
</DL>
<HR>

<A NAME="init(org.geotools.graph.structure.Graph, org.geotools.graph.traverse.GraphTraversal)"><!-- --></A><H3>
init</H3>
<PRE>
public void <B>init</B>(<A HREF="../../../../org/geotools/graph/structure/Graph.html" title="interface in org.geotools.graph.structure">Graph</A>&nbsp;graph,
                 <A HREF="../../../../org/geotools/graph/traverse/GraphTraversal.html" title="interface in org.geotools.graph.traverse">GraphTraversal</A>&nbsp;traversal)</PRE>
<DL>
<DD>Signals to the itereator that iteration is about to begin. This often 
 results in the creation/initialization of any internal data structures 
 used by the iterator.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>graph</CODE> - The graph being whose components are being iterated over.</DL>
</DD>
</DL>
<HR>

<A NAME="next(org.geotools.graph.traverse.GraphTraversal)"><!-- --></A><H3>
next</H3>
<PRE>
public <A HREF="../../../../org/geotools/graph/structure/Graphable.html" title="interface in org.geotools.graph.structure">Graphable</A> <B>next</B>(<A HREF="../../../../org/geotools/graph/traverse/GraphTraversal.html" title="interface in org.geotools.graph.traverse">GraphTraversal</A>&nbsp;traversal)</PRE>
<DL>
<DD>Returns the next graph component in the iteration. To signal to the caller
 that the iteration is complete, null should be returned.
<P>
<DD><DL>

<DT><B>Returns:</B><DD>The next component in the iteration, or null if iteration is 
 complete.</DL>
</DD>
</DL>
<HR>

<A NAME="cont(org.geotools.graph.structure.Graphable, org.geotools.graph.traverse.GraphTraversal)"><!-- --></A><H3>
cont</H3>
<PRE>
public void <B>cont</B>(<A HREF="../../../../org/geotools/graph/structure/Graphable.html" title="interface in org.geotools.graph.structure">Graphable</A>&nbsp;current,
                 <A HREF="../../../../org/geotools/graph/traverse/GraphTraversal.html" title="interface in org.geotools.graph.traverse">GraphTraversal</A>&nbsp;traversal)</PRE>
<DL>
<DD>Signals to the iterator that iteration should continue from the current
 component in the traversal.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>current</CODE> - The current component of the traversal.</DL>
</DD>
</DL>
<HR>

<A NAME="killBranch(org.geotools.graph.structure.Graphable, org.geotools.graph.traverse.GraphTraversal)"><!-- --></A><H3>
killBranch</H3>
<PRE>
public void <B>killBranch</B>(<A HREF="../../../../org/geotools/graph/structure/Graphable.html" title="interface in org.geotools.graph.structure">Graphable</A>&nbsp;current,
                       <A HREF="../../../../org/geotools/graph/traverse/GraphTraversal.html" title="interface in org.geotools.graph.traverse">GraphTraversal</A>&nbsp;traversal)</PRE>
<DL>
<DD>Signals the iterator to kill the branch at the current component.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>current</CODE> - The current component of the traversal.</DL>
</DD>
</DL>
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