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<FONT color="green">001</FONT> package org.maltparser.parser.algorithm.nivre;<a name="line.1"></a>
<FONT color="green">002</FONT> <a name="line.2"></a>
<FONT color="green">003</FONT> import java.util.Stack;<a name="line.3"></a>
<FONT color="green">004</FONT> <a name="line.4"></a>
<FONT color="green">005</FONT> import org.maltparser.core.exception.MaltChainedException;<a name="line.5"></a>
<FONT color="green">006</FONT> import org.maltparser.core.symbol.SymbolTable;<a name="line.6"></a>
<FONT color="green">007</FONT> import org.maltparser.core.symbol.SymbolTableHandler;<a name="line.7"></a>
<FONT color="green">008</FONT> import org.maltparser.core.syntaxgraph.DependencyGraph;<a name="line.8"></a>
<FONT color="green">009</FONT> import org.maltparser.core.syntaxgraph.DependencyStructure;<a name="line.9"></a>
<FONT color="green">010</FONT> import org.maltparser.core.syntaxgraph.edge.Edge;<a name="line.10"></a>
<FONT color="green">011</FONT> import org.maltparser.core.syntaxgraph.node.DependencyNode;<a name="line.11"></a>
<FONT color="green">012</FONT> import org.maltparser.parser.ParserConfiguration;<a name="line.12"></a>
<FONT color="green">013</FONT> import org.maltparser.parser.ParsingException;<a name="line.13"></a>
<FONT color="green">014</FONT> /**<a name="line.14"></a>
<FONT color="green">015</FONT> * @author Johan Hall<a name="line.15"></a>
<FONT color="green">016</FONT> *<a name="line.16"></a>
<FONT color="green">017</FONT> */<a name="line.17"></a>
<FONT color="green">018</FONT> public class NivreConfig extends ParserConfiguration {<a name="line.18"></a>
<FONT color="green">019</FONT> // Root Handling<a name="line.19"></a>
<FONT color="green">020</FONT> public static final int STRICT = 1; //root tokens unattached, Reduce not permissible<a name="line.20"></a>
<FONT color="green">021</FONT> public static final int RELAXED = 2; //root tokens unattached, Reduce permissible<a name="line.21"></a>
<FONT color="green">022</FONT> public static final int NORMAL = 3; //root tokens attached to Root with RightArc<a name="line.22"></a>
<FONT color="green">023</FONT> <a name="line.23"></a>
<FONT color="green">024</FONT> private Stack<DependencyNode> stack;<a name="line.24"></a>
<FONT color="green">025</FONT> private Stack<DependencyNode> input;<a name="line.25"></a>
<FONT color="green">026</FONT> private DependencyStructure dependencyGraph;<a name="line.26"></a>
<FONT color="green">027</FONT> private int rootHandling;<a name="line.27"></a>
<FONT color="green">028</FONT> <a name="line.28"></a>
<FONT color="green">029</FONT> <a name="line.29"></a>
<FONT color="green">030</FONT> public NivreConfig(SymbolTableHandler symbolTableHandler, String rootHandling) throws MaltChainedException {<a name="line.30"></a>
<FONT color="green">031</FONT> super();<a name="line.31"></a>
<FONT color="green">032</FONT> stack = new Stack<DependencyNode>();<a name="line.32"></a>
<FONT color="green">033</FONT> input = new Stack<DependencyNode>();<a name="line.33"></a>
<FONT color="green">034</FONT> dependencyGraph = new DependencyGraph(symbolTableHandler);<a name="line.34"></a>
<FONT color="green">035</FONT> setRootHandling(rootHandling);<a name="line.35"></a>
<FONT color="green">036</FONT> }<a name="line.36"></a>
<FONT color="green">037</FONT> <a name="line.37"></a>
<FONT color="green">038</FONT> public Stack<DependencyNode> getStack() {<a name="line.38"></a>
<FONT color="green">039</FONT> return stack;<a name="line.39"></a>
<FONT color="green">040</FONT> }<a name="line.40"></a>
<FONT color="green">041</FONT> <a name="line.41"></a>
<FONT color="green">042</FONT> public Stack<DependencyNode> getInput() {<a name="line.42"></a>
<FONT color="green">043</FONT> return input;<a name="line.43"></a>
<FONT color="green">044</FONT> }<a name="line.44"></a>
<FONT color="green">045</FONT> <a name="line.45"></a>
<FONT color="green">046</FONT> public DependencyStructure getDependencyStructure() {<a name="line.46"></a>
<FONT color="green">047</FONT> return dependencyGraph;<a name="line.47"></a>
<FONT color="green">048</FONT> }<a name="line.48"></a>
<FONT color="green">049</FONT> <a name="line.49"></a>
<FONT color="green">050</FONT> public boolean isTerminalState() {<a name="line.50"></a>
<FONT color="green">051</FONT> return input.isEmpty();<a name="line.51"></a>
<FONT color="green">052</FONT> }<a name="line.52"></a>
<FONT color="green">053</FONT> <a name="line.53"></a>
<FONT color="green">054</FONT> public DependencyNode getStackNode(int index) throws MaltChainedException {<a name="line.54"></a>
<FONT color="green">055</FONT> if (index < 0) {<a name="line.55"></a>
<FONT color="green">056</FONT> throw new ParsingException("Stack index must be non-negative in feature specification. ");<a name="line.56"></a>
<FONT color="green">057</FONT> }<a name="line.57"></a>
<FONT color="green">058</FONT> if (stack.size()-index > 0) {<a name="line.58"></a>
<FONT color="green">059</FONT> return stack.get(stack.size()-1-index);<a name="line.59"></a>
<FONT color="green">060</FONT> }<a name="line.60"></a>
<FONT color="green">061</FONT> return null;<a name="line.61"></a>
<FONT color="green">062</FONT> }<a name="line.62"></a>
<FONT color="green">063</FONT> <a name="line.63"></a>
<FONT color="green">064</FONT> public DependencyNode getInputNode(int index) throws MaltChainedException {<a name="line.64"></a>
<FONT color="green">065</FONT> if (index < 0) {<a name="line.65"></a>
<FONT color="green">066</FONT> throw new ParsingException("Input index must be non-negative in feature specification. ");<a name="line.66"></a>
<FONT color="green">067</FONT> }<a name="line.67"></a>
<FONT color="green">068</FONT> if (input.size()-index > 0) {<a name="line.68"></a>
<FONT color="green">069</FONT> return input.get(input.size()-1-index);<a name="line.69"></a>
<FONT color="green">070</FONT> } <a name="line.70"></a>
<FONT color="green">071</FONT> return null;<a name="line.71"></a>
<FONT color="green">072</FONT> }<a name="line.72"></a>
<FONT color="green">073</FONT> <a name="line.73"></a>
<FONT color="green">074</FONT> public void setDependencyGraph(DependencyStructure source) throws MaltChainedException {<a name="line.74"></a>
<FONT color="green">075</FONT> dependencyGraph.clear();<a name="line.75"></a>
<FONT color="green">076</FONT> for (int index : source.getTokenIndices()) {<a name="line.76"></a>
<FONT color="green">077</FONT> DependencyNode gnode = source.getTokenNode(index);<a name="line.77"></a>
<FONT color="green">078</FONT> DependencyNode pnode = dependencyGraph.addTokenNode(gnode.getIndex());<a name="line.78"></a>
<FONT color="green">079</FONT> for (SymbolTable table : gnode.getLabelTypes()) {<a name="line.79"></a>
<FONT color="green">080</FONT> pnode.addLabel(table, gnode.getLabelSymbol(table));<a name="line.80"></a>
<FONT color="green">081</FONT> }<a name="line.81"></a>
<FONT color="green">082</FONT> <a name="line.82"></a>
<FONT color="green">083</FONT> if (gnode.hasHead()) {<a name="line.83"></a>
<FONT color="green">084</FONT> Edge s = gnode.getHeadEdge();<a name="line.84"></a>
<FONT color="green">085</FONT> Edge t = dependencyGraph.addDependencyEdge(s.getSource().getIndex(), s.getTarget().getIndex());<a name="line.85"></a>
<FONT color="green">086</FONT> <a name="line.86"></a>
<FONT color="green">087</FONT> for (SymbolTable table : s.getLabelTypes()) {<a name="line.87"></a>
<FONT color="green">088</FONT> t.addLabel(table, s.getLabelSymbol(table));<a name="line.88"></a>
<FONT color="green">089</FONT> }<a name="line.89"></a>
<FONT color="green">090</FONT> }<a name="line.90"></a>
<FONT color="green">091</FONT> }<a name="line.91"></a>
<FONT color="green">092</FONT> for (SymbolTable table : source.getDefaultRootEdgeLabels().keySet()) {<a name="line.92"></a>
<FONT color="green">093</FONT> dependencyGraph.setDefaultRootEdgeLabel(table, source.getDefaultRootEdgeLabelSymbol(table));<a name="line.93"></a>
<FONT color="green">094</FONT> }<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> public DependencyStructure getDependencyGraph() {<a name="line.97"></a>
<FONT color="green">098</FONT> return dependencyGraph;<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> public void initialize(ParserConfiguration parserConfiguration) throws MaltChainedException {<a name="line.101"></a>
<FONT color="green">102</FONT> if (parserConfiguration != null) {<a name="line.102"></a>
<FONT color="green">103</FONT> NivreConfig nivreConfig = (NivreConfig)parserConfiguration;<a name="line.103"></a>
<FONT color="green">104</FONT> Stack<DependencyNode> sourceStack = nivreConfig.getStack();<a name="line.104"></a>
<FONT color="green">105</FONT> Stack<DependencyNode> sourceInput = nivreConfig.getInput();<a name="line.105"></a>
<FONT color="green">106</FONT> setDependencyGraph(nivreConfig.getDependencyGraph());<a name="line.106"></a>
<FONT color="green">107</FONT> for (int i = 0, n = sourceStack.size(); i < n; i++) {<a name="line.107"></a>
<FONT color="green">108</FONT> stack.add(dependencyGraph.getDependencyNode(sourceStack.get(i).getIndex()));<a name="line.108"></a>
<FONT color="green">109</FONT> }<a name="line.109"></a>
<FONT color="green">110</FONT> for (int i = 0, n = sourceInput.size(); i < n; i++) {<a name="line.110"></a>
<FONT color="green">111</FONT> input.add(dependencyGraph.getDependencyNode(sourceInput.get(i).getIndex()));<a name="line.111"></a>
<FONT color="green">112</FONT> }<a name="line.112"></a>
<FONT color="green">113</FONT> } else {<a name="line.113"></a>
<FONT color="green">114</FONT> stack.push(dependencyGraph.getDependencyRoot());<a name="line.114"></a>
<FONT color="green">115</FONT> for (int i = dependencyGraph.getHighestTokenIndex(); i > 0; i--) {<a name="line.115"></a>
<FONT color="green">116</FONT> final DependencyNode node = dependencyGraph.getDependencyNode(i);<a name="line.116"></a>
<FONT color="green">117</FONT> if (node != null && !node.hasHead()) { // added !node.hasHead()<a name="line.117"></a>
<FONT color="green">118</FONT> input.push(node);<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> }<a name="line.122"></a>
<FONT color="green">123</FONT> <a name="line.123"></a>
<FONT color="green">124</FONT> public int getRootHandling() {<a name="line.124"></a>
<FONT color="green">125</FONT> return rootHandling;<a name="line.125"></a>
<FONT color="green">126</FONT> }<a name="line.126"></a>
<FONT color="green">127</FONT> <a name="line.127"></a>
<FONT color="green">128</FONT> public void setRootHandling(int rootHandling) {<a name="line.128"></a>
<FONT color="green">129</FONT> this.rootHandling = rootHandling;<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> protected void setRootHandling(String rh) throws MaltChainedException {<a name="line.132"></a>
<FONT color="green">133</FONT> if (rh.equalsIgnoreCase("strict")) {<a name="line.133"></a>
<FONT color="green">134</FONT> rootHandling = STRICT;<a name="line.134"></a>
<FONT color="green">135</FONT> } else if (rh.equalsIgnoreCase("relaxed")) {<a name="line.135"></a>
<FONT color="green">136</FONT> rootHandling = RELAXED;<a name="line.136"></a>
<FONT color="green">137</FONT> } else if (rh.equalsIgnoreCase("normal")) {<a name="line.137"></a>
<FONT color="green">138</FONT> rootHandling = NORMAL;<a name="line.138"></a>
<FONT color="green">139</FONT> } else {<a name="line.139"></a>
<FONT color="green">140</FONT> throw new ParsingException("The root handling '"+rh+"' is unknown");<a name="line.140"></a>
<FONT color="green">141</FONT> }<a name="line.141"></a>
<FONT color="green">142</FONT> }<a name="line.142"></a>
<FONT color="green">143</FONT> <a name="line.143"></a>
<FONT color="green">144</FONT> public void clear() throws MaltChainedException {<a name="line.144"></a>
<FONT color="green">145</FONT> dependencyGraph.clear();<a name="line.145"></a>
<FONT color="green">146</FONT> stack.clear();<a name="line.146"></a>
<FONT color="green">147</FONT> input.clear();<a name="line.147"></a>
<FONT color="green">148</FONT> historyNode = null;<a name="line.148"></a>
<FONT color="green">149</FONT> }<a name="line.149"></a>
<FONT color="green">150</FONT> <a name="line.150"></a>
<FONT color="green">151</FONT> public boolean equals(Object obj) {<a name="line.151"></a>
<FONT color="green">152</FONT> if (this == obj)<a name="line.152"></a>
<FONT color="green">153</FONT> return true;<a name="line.153"></a>
<FONT color="green">154</FONT> if (obj == null)<a name="line.154"></a>
<FONT color="green">155</FONT> return false;<a name="line.155"></a>
<FONT color="green">156</FONT> if (getClass() != obj.getClass())<a name="line.156"></a>
<FONT color="green">157</FONT> return false;<a name="line.157"></a>
<FONT color="green">158</FONT> NivreConfig that = (NivreConfig)obj;<a name="line.158"></a>
<FONT color="green">159</FONT> <a name="line.159"></a>
<FONT color="green">160</FONT> if (stack.size() != that.getStack().size()) <a name="line.160"></a>
<FONT color="green">161</FONT> return false;<a name="line.161"></a>
<FONT color="green">162</FONT> if (input.size() != that.getInput().size())<a name="line.162"></a>
<FONT color="green">163</FONT> return false;<a name="line.163"></a>
<FONT color="green">164</FONT> if (dependencyGraph.nEdges() != that.getDependencyGraph().nEdges())<a name="line.164"></a>
<FONT color="green">165</FONT> return false;<a name="line.165"></a>
<FONT color="green">166</FONT> for (int i = 0; i < stack.size(); i++) {<a name="line.166"></a>
<FONT color="green">167</FONT> if (stack.get(i).getIndex() != that.getStack().get(i).getIndex()) {<a name="line.167"></a>
<FONT color="green">168</FONT> return false;<a name="line.168"></a>
<FONT color="green">169</FONT> }<a name="line.169"></a>
<FONT color="green">170</FONT> }<a name="line.170"></a>
<FONT color="green">171</FONT> for (int i = 0; i < input.size(); i++) {<a name="line.171"></a>
<FONT color="green">172</FONT> if (input.get(i).getIndex() != that.getInput().get(i).getIndex()) {<a name="line.172"></a>
<FONT color="green">173</FONT> return false;<a name="line.173"></a>
<FONT color="green">174</FONT> }<a name="line.174"></a>
<FONT color="green">175</FONT> } <a name="line.175"></a>
<FONT color="green">176</FONT> return dependencyGraph.getEdges().equals(that.getDependencyGraph().getEdges());<a name="line.176"></a>
<FONT color="green">177</FONT> }<a name="line.177"></a>
<FONT color="green">178</FONT> <a name="line.178"></a>
<FONT color="green">179</FONT> public String toString() {<a name="line.179"></a>
<FONT color="green">180</FONT> final StringBuilder sb = new StringBuilder();<a name="line.180"></a>
<FONT color="green">181</FONT> sb.append(stack.size());<a name="line.181"></a>
<FONT color="green">182</FONT> sb.append(", ");<a name="line.182"></a>
<FONT color="green">183</FONT> sb.append(input.size());<a name="line.183"></a>
<FONT color="green">184</FONT> sb.append(", ");<a name="line.184"></a>
<FONT color="green">185</FONT> sb.append(dependencyGraph.nEdges());<a name="line.185"></a>
<FONT color="green">186</FONT> return sb.toString();<a name="line.186"></a>
<FONT color="green">187</FONT> }<a name="line.187"></a>
<FONT color="green">188</FONT> }<a name="line.188"></a>
</PRE>
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