| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.lucene.analysis; |
| |
| import java.io.PrintWriter; |
| import java.io.IOException; |
| |
| import org.apache.lucene.analysis.tokenattributes.CharTermAttribute; |
| import org.apache.lucene.analysis.tokenattributes.OffsetAttribute; |
| import org.apache.lucene.analysis.tokenattributes.PositionIncrementAttribute; |
| import org.apache.lucene.analysis.tokenattributes.PositionLengthAttribute; |
| |
| /** Consumes a TokenStream and outputs the dot (graphviz) string (graph). */ |
| public class TokenStreamToDot { |
| |
| private final TokenStream in; |
| private final CharTermAttribute termAtt; |
| private final PositionIncrementAttribute posIncAtt; |
| private final PositionLengthAttribute posLengthAtt; |
| private final OffsetAttribute offsetAtt; |
| private final String inputText; |
| protected final PrintWriter out; |
| |
| /** If inputText is non-null, and the TokenStream has |
| * offsets, we include the surface form in each arc's |
| * label. */ |
| public TokenStreamToDot(String inputText, TokenStream in, PrintWriter out) { |
| this.in = in; |
| this.out = out; |
| this.inputText = inputText; |
| termAtt = in.addAttribute(CharTermAttribute.class); |
| posIncAtt = in.addAttribute(PositionIncrementAttribute.class); |
| posLengthAtt = in.addAttribute(PositionLengthAttribute.class); |
| if (in.hasAttribute(OffsetAttribute.class)) { |
| offsetAtt = in.addAttribute(OffsetAttribute.class); |
| } else { |
| offsetAtt = null; |
| } |
| } |
| |
| public void toDot() throws IOException { |
| in.reset(); |
| writeHeader(); |
| |
| // TODO: is there some way to tell dot that it should |
| // make the "main path" a straight line and have the |
| // non-sausage arcs not affect node placement... |
| |
| int pos = -1; |
| int lastEndPos = -1; |
| while (in.incrementToken()) { |
| final boolean isFirst = pos == -1; |
| int posInc = posIncAtt.getPositionIncrement(); |
| if (isFirst && posInc == 0) { |
| // TODO: hmm are TS's still allowed to do this...? |
| System.err.println("WARNING: first posInc was 0; correcting to 1"); |
| posInc = 1; |
| } |
| |
| if (posInc > 0) { |
| // New node: |
| pos += posInc; |
| writeNode(pos, Integer.toString(pos)); |
| } |
| |
| if (posInc > 1) { |
| // Gap! |
| writeArc(lastEndPos, pos, null, "dotted"); |
| } |
| |
| if (isFirst) { |
| writeNode(-1, null); |
| writeArc(-1, pos, null, null); |
| } |
| |
| String arcLabel = termAtt.toString(); |
| if (offsetAtt != null) { |
| final int startOffset = offsetAtt.startOffset(); |
| final int endOffset = offsetAtt.endOffset(); |
| //System.out.println("start=" + startOffset + " end=" + endOffset + " len=" + inputText.length()); |
| if (inputText != null) { |
| String fragment = inputText.substring(startOffset, endOffset); |
| if (fragment.equals(termAtt.toString()) == false) { |
| arcLabel += " / " + fragment; |
| } |
| } else { |
| arcLabel += " / " + startOffset + "-" + endOffset; |
| } |
| } |
| |
| writeArc(pos, pos + posLengthAtt.getPositionLength(), arcLabel, null); |
| lastEndPos = pos + posLengthAtt.getPositionLength(); |
| } |
| |
| in.end(); |
| |
| if (lastEndPos != -1) { |
| // TODO: should we output any final text (from end |
| // offsets) on this arc...? |
| writeNode(-2, null); |
| writeArc(lastEndPos, -2, null, null); |
| } |
| |
| writeTrailer(); |
| } |
| |
| protected void writeArc(int fromNode, int toNode, String label, String style) { |
| out.print(" " + fromNode + " -> " + toNode + " ["); |
| if (label != null) { |
| out.print(" label=\"" + label + "\""); |
| } |
| if (style != null) { |
| out.print(" style=\"" + style + "\""); |
| } |
| out.println("]"); |
| } |
| |
| protected void writeNode(int name, String label) { |
| out.print(" " + name); |
| if (label != null) { |
| out.print(" [label=\"" + label + "\"]"); |
| } else { |
| out.print(" [shape=point color=white]"); |
| } |
| out.println(); |
| } |
| |
| private final static String FONT_NAME = "Helvetica"; |
| |
| /** Override to customize. */ |
| protected void writeHeader() { |
| out.println("digraph tokens {"); |
| out.println(" graph [ fontsize=30 labelloc=\"t\" label=\"\" splines=true overlap=false rankdir = \"LR\" ];"); |
| out.println(" // A2 paper size"); |
| out.println(" size = \"34.4,16.5\";"); |
| //out.println(" // try to fill paper"); |
| //out.println(" ratio = fill;"); |
| out.println(" edge [ fontname=\"" + FONT_NAME + "\" fontcolor=\"red\" color=\"#606060\" ]"); |
| out.println(" node [ style=\"filled\" fillcolor=\"#e8e8f0\" shape=\"Mrecord\" fontname=\"" + FONT_NAME + "\" ]"); |
| out.println(); |
| } |
| |
| /** Override to customize. */ |
| protected void writeTrailer() { |
| out.println("}"); |
| } |
| } |