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<FONT color="green">001</FONT> package org.maltparser.core.propagation;<a name="line.1"></a>
<FONT color="green">002</FONT> <a name="line.2"></a>
<FONT color="green">003</FONT> import java.util.SortedSet;<a name="line.3"></a>
<FONT color="green">004</FONT> import java.util.TreeSet;<a name="line.4"></a>
<FONT color="green">005</FONT> import java.util.regex.Pattern;<a name="line.5"></a>
<FONT color="green">006</FONT> <a name="line.6"></a>
<FONT color="green">007</FONT> import org.maltparser.core.exception.MaltChainedException;<a name="line.7"></a>
<FONT color="green">008</FONT> import org.maltparser.core.propagation.spec.PropagationSpec;<a name="line.8"></a>
<FONT color="green">009</FONT> import org.maltparser.core.symbol.SymbolTable;<a name="line.9"></a>
<FONT color="green">010</FONT> import org.maltparser.core.symbol.SymbolTableHandler;<a name="line.10"></a>
<FONT color="green">011</FONT> import org.maltparser.core.syntaxgraph.edge.Edge;<a name="line.11"></a>
<FONT color="green">012</FONT> import org.maltparser.core.syntaxgraph.node.DependencyNode;<a name="line.12"></a>
<FONT color="green">013</FONT> <a name="line.13"></a>
<FONT color="green">014</FONT> /**<a name="line.14"></a>
<FONT color="green">015</FONT> * A propagation object propagate a column value from one node to a column in another node based on the propagation specification. <a name="line.15"></a>
<FONT color="green">016</FONT> * <a name="line.16"></a>
<FONT color="green">017</FONT> * @author Johan Hall<a name="line.17"></a>
<FONT color="green">018</FONT> *<a name="line.18"></a>
<FONT color="green">019</FONT> */<a name="line.19"></a>
<FONT color="green">020</FONT> public class Propagation {<a name="line.20"></a>
<FONT color="green">021</FONT> /**<a name="line.21"></a>
<FONT color="green">022</FONT> * <a name="line.22"></a>
<FONT color="green">023</FONT> */<a name="line.23"></a>
<FONT color="green">024</FONT> private SymbolTable fromTable;<a name="line.24"></a>
<FONT color="green">025</FONT> private SymbolTable toTable;<a name="line.25"></a>
<FONT color="green">026</FONT> private SymbolTable deprelTable;<a name="line.26"></a>
<FONT color="green">027</FONT> private SortedSet<String> forSet;<a name="line.27"></a>
<FONT color="green">028</FONT> private SortedSet<String> overSet;<a name="line.28"></a>
<FONT color="green">029</FONT> <a name="line.29"></a>
<FONT color="green">030</FONT> private Pattern symbolSeparator;<a name="line.30"></a>
<FONT color="green">031</FONT> <a name="line.31"></a>
<FONT color="green">032</FONT> /**<a name="line.32"></a>
<FONT color="green">033</FONT> * Creates a propagation object based on the propagation specification<a name="line.33"></a>
<FONT color="green">034</FONT> * <a name="line.34"></a>
<FONT color="green">035</FONT> * @param spec a propagation specification<a name="line.35"></a>
<FONT color="green">036</FONT> * @param symbolTables a symbol table<a name="line.36"></a>
<FONT color="green">037</FONT> * @throws MaltChainedException<a name="line.37"></a>
<FONT color="green">038</FONT> */<a name="line.38"></a>
<FONT color="green">039</FONT> public Propagation(PropagationSpec spec, SymbolTableHandler symbolTables) throws MaltChainedException {<a name="line.39"></a>
<FONT color="green">040</FONT> fromTable = symbolTables.getSymbolTable(spec.getFrom());<a name="line.40"></a>
<FONT color="green">041</FONT> if (fromTable == null) {<a name="line.41"></a>
<FONT color="green">042</FONT> throw new PropagationException("The symbol table '"+spec.getFrom()+" does not exists.");<a name="line.42"></a>
<FONT color="green">043</FONT> }<a name="line.43"></a>
<FONT color="green">044</FONT> toTable = symbolTables.getSymbolTable(spec.getTo());<a name="line.44"></a>
<FONT color="green">045</FONT> if (toTable == null) {<a name="line.45"></a>
<FONT color="green">046</FONT> toTable = symbolTables.addSymbolTable(spec.getTo(), fromTable);<a name="line.46"></a>
<FONT color="green">047</FONT> }<a name="line.47"></a>
<FONT color="green">048</FONT> <a name="line.48"></a>
<FONT color="green">049</FONT> forSet = new TreeSet<String>();<a name="line.49"></a>
<FONT color="green">050</FONT> if (spec.getFor() != null && spec.getFor().length() > 0) {<a name="line.50"></a>
<FONT color="green">051</FONT> String[] items = spec.getFor().split("\\|");<a name="line.51"></a>
<FONT color="green">052</FONT> <a name="line.52"></a>
<FONT color="green">053</FONT> for (String item : items) {<a name="line.53"></a>
<FONT color="green">054</FONT> forSet.add(item);<a name="line.54"></a>
<FONT color="green">055</FONT> }<a name="line.55"></a>
<FONT color="green">056</FONT> }<a name="line.56"></a>
<FONT color="green">057</FONT> <a name="line.57"></a>
<FONT color="green">058</FONT> overSet = new TreeSet<String>();<a name="line.58"></a>
<FONT color="green">059</FONT> if (spec.getOver() != null && spec.getOver().length() > 0) {<a name="line.59"></a>
<FONT color="green">060</FONT> String[] items = spec.getOver().split("\\|");<a name="line.60"></a>
<FONT color="green">061</FONT> <a name="line.61"></a>
<FONT color="green">062</FONT> for (String item : items) {<a name="line.62"></a>
<FONT color="green">063</FONT> overSet.add(item);<a name="line.63"></a>
<FONT color="green">064</FONT> }<a name="line.64"></a>
<FONT color="green">065</FONT> }<a name="line.65"></a>
<FONT color="green">066</FONT> <a name="line.66"></a>
<FONT color="green">067</FONT> deprelTable = symbolTables.getSymbolTable("DEPREL");<a name="line.67"></a>
<FONT color="green">068</FONT> symbolSeparator = Pattern.compile("\\|");<a name="line.68"></a>
<FONT color="green">069</FONT> }<a name="line.69"></a>
<FONT color="green">070</FONT> <a name="line.70"></a>
<FONT color="green">071</FONT> /**<a name="line.71"></a>
<FONT color="green">072</FONT> * Propagate columns according to the propagation specification<a name="line.72"></a>
<FONT color="green">073</FONT> * <a name="line.73"></a>
<FONT color="green">074</FONT> * @param e an edge <a name="line.74"></a>
<FONT color="green">075</FONT> * @throws MaltChainedException<a name="line.75"></a>
<FONT color="green">076</FONT> */<a name="line.76"></a>
<FONT color="green">077</FONT> public void propagate(Edge e) throws MaltChainedException {<a name="line.77"></a>
<FONT color="green">078</FONT> if (e != null && e.hasLabel(deprelTable) && !e.getSource().isRoot()) {<a name="line.78"></a>
<FONT color="green">079</FONT> if (overSet.size() == 0 || overSet.contains(e.getLabelSymbol(deprelTable))) {<a name="line.79"></a>
<FONT color="green">080</FONT> DependencyNode to = (DependencyNode)e.getSource();<a name="line.80"></a>
<FONT color="green">081</FONT> DependencyNode from = (DependencyNode)e.getTarget();<a name="line.81"></a>
<FONT color="green">082</FONT> String fromSymbol = null;<a name="line.82"></a>
<FONT color="green">083</FONT> if (e.hasLabel(fromTable)) {<a name="line.83"></a>
<FONT color="green">084</FONT> fromSymbol = e.getLabelSymbol(fromTable);<a name="line.84"></a>
<FONT color="green">085</FONT> } else if (from.hasLabel(fromTable)) {<a name="line.85"></a>
<FONT color="green">086</FONT> fromSymbol = from.getLabelSymbol(fromTable);<a name="line.86"></a>
<FONT color="green">087</FONT> }<a name="line.87"></a>
<FONT color="green">088</FONT> <a name="line.88"></a>
<FONT color="green">089</FONT> String propSymbol = null;<a name="line.89"></a>
<FONT color="green">090</FONT> if (to.hasLabel(toTable)) {<a name="line.90"></a>
<FONT color="green">091</FONT> propSymbol = union(fromSymbol, to.getLabelSymbol(toTable));<a name="line.91"></a>
<FONT color="green">092</FONT> } else {<a name="line.92"></a>
<FONT color="green">093</FONT> if (forSet.size() == 0 || forSet.contains(fromSymbol)) {<a name="line.93"></a>
<FONT color="green">094</FONT> propSymbol = fromSymbol;<a name="line.94"></a>
<FONT color="green">095</FONT> }<a name="line.95"></a>
<FONT color="green">096</FONT> }<a name="line.96"></a>
<FONT color="green">097</FONT> if (propSymbol != null) {<a name="line.97"></a>
<FONT color="green">098</FONT> to.addLabel(toTable, propSymbol);<a name="line.98"></a>
<FONT color="green">099</FONT> }<a name="line.99"></a>
<FONT color="green">100</FONT> }<a name="line.100"></a>
<FONT color="green">101</FONT> }<a name="line.101"></a>
<FONT color="green">102</FONT> }<a name="line.102"></a>
<FONT color="green">103</FONT> <a name="line.103"></a>
<FONT color="green">104</FONT> private String union(String fromSymbol, String toSymbol) {<a name="line.104"></a>
<FONT color="green">105</FONT> SortedSet<String> symbolSet = new TreeSet<String>();<a name="line.105"></a>
<FONT color="green">106</FONT> <a name="line.106"></a>
<FONT color="green">107</FONT> if (fromSymbol != null && fromSymbol.length() != 0) {<a name="line.107"></a>
<FONT color="green">108</FONT> String[] fromSymbols = symbolSeparator.split(fromSymbol);<a name="line.108"></a>
<FONT color="green">109</FONT> for (int i = 0; i < fromSymbols.length; i++) {<a name="line.109"></a>
<FONT color="green">110</FONT> if (forSet.size() == 0 || forSet.contains(fromSymbols[i])) {<a name="line.110"></a>
<FONT color="green">111</FONT> symbolSet.add(fromSymbols[i]);<a name="line.111"></a>
<FONT color="green">112</FONT> }<a name="line.112"></a>
<FONT color="green">113</FONT> }<a name="line.113"></a>
<FONT color="green">114</FONT> }<a name="line.114"></a>
<FONT color="green">115</FONT> if (toSymbol != null && toSymbol.length() != 0) {<a name="line.115"></a>
<FONT color="green">116</FONT> String[] toSymbols = symbolSeparator.split(toSymbol);<a name="line.116"></a>
<FONT color="green">117</FONT> for (int i = 0; i < toSymbols.length; i++) {<a name="line.117"></a>
<FONT color="green">118</FONT> symbolSet.add(toSymbols[i]);<a name="line.118"></a>
<FONT color="green">119</FONT> }<a name="line.119"></a>
<FONT color="green">120</FONT> }<a name="line.120"></a>
<FONT color="green">121</FONT> <a name="line.121"></a>
<FONT color="green">122</FONT> if (symbolSet.size() > 0) {<a name="line.122"></a>
<FONT color="green">123</FONT> StringBuilder sb = new StringBuilder();<a name="line.123"></a>
<FONT color="green">124</FONT> for (String symbol : symbolSet) {<a name="line.124"></a>
<FONT color="green">125</FONT> sb.append(symbol);<a name="line.125"></a>
<FONT color="green">126</FONT> sb.append('|');<a name="line.126"></a>
<FONT color="green">127</FONT> }<a name="line.127"></a>
<FONT color="green">128</FONT> sb.setLength(sb.length()-1);<a name="line.128"></a>
<FONT color="green">129</FONT> return sb.toString();<a name="line.129"></a>
<FONT color="green">130</FONT> }<a name="line.130"></a>
<FONT color="green">131</FONT> <a name="line.131"></a>
<FONT color="green">132</FONT> <a name="line.132"></a>
<FONT color="green">133</FONT> return "";<a name="line.133"></a>
<FONT color="green">134</FONT> }<a name="line.134"></a>
<FONT color="green">135</FONT> @Override<a name="line.135"></a>
<FONT color="green">136</FONT> public String toString() {<a name="line.136"></a>
<FONT color="green">137</FONT> return "Propagation [forSet=" + forSet + ", fromTable=" + fromTable<a name="line.137"></a>
<FONT color="green">138</FONT> + ", overSet=" + overSet + ", toTable=" + toTable + "]";<a name="line.138"></a>
<FONT color="green">139</FONT> }<a name="line.139"></a>
<FONT color="green">140</FONT> }<a name="line.140"></a>
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