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TIEDEMANN / uplug-main-0.3.7 / share / ext / parser / malt / docs / api / src-html / org / maltparser / parser / algorithm / planar / Planar.html 
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<FONT color="green">001</FONT>    package org.maltparser.parser.algorithm.planar;<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.syntaxgraph.DependencyStructure;<a name="line.6"></a>
<FONT color="green">007</FONT>    import org.maltparser.core.syntaxgraph.edge.Edge;<a name="line.7"></a>
<FONT color="green">008</FONT>    import org.maltparser.core.syntaxgraph.node.DependencyNode;<a name="line.8"></a>
<FONT color="green">009</FONT>    import org.maltparser.parser.ParserConfiguration;<a name="line.9"></a>
<FONT color="green">010</FONT>    import org.maltparser.parser.TransitionSystem;<a name="line.10"></a>
<FONT color="green">011</FONT>    import org.maltparser.parser.history.GuideUserHistory;<a name="line.11"></a>
<FONT color="green">012</FONT>    import org.maltparser.parser.history.History;<a name="line.12"></a>
<FONT color="green">013</FONT>    import org.maltparser.parser.history.action.ComplexDecisionAction;<a name="line.13"></a>
<FONT color="green">014</FONT>    import org.maltparser.parser.history.action.GuideUserAction;<a name="line.14"></a>
<FONT color="green">015</FONT>    import org.maltparser.parser.transition.TransitionTable;<a name="line.15"></a>
<FONT color="green">016</FONT>    /**<a name="line.16"></a>
<FONT color="green">017</FONT>     * @author Carlos Gomez Rodriguez<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 Planar extends TransitionSystem {<a name="line.20"></a>
<FONT color="green">021</FONT>            protected static final int SHIFT = 1;<a name="line.21"></a>
<FONT color="green">022</FONT>            protected static final int REDUCE = 2;<a name="line.22"></a>
<FONT color="green">023</FONT>            protected static final int RIGHTARC = 3;<a name="line.23"></a>
<FONT color="green">024</FONT>            protected static final int LEFTARC = 4;<a name="line.24"></a>
<FONT color="green">025</FONT>            <a name="line.25"></a>
<FONT color="green">026</FONT>            public Planar() throws MaltChainedException {<a name="line.26"></a>
<FONT color="green">027</FONT>                    super();<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 void apply(GuideUserAction currentAction, ParserConfiguration config) throws MaltChainedException {<a name="line.30"></a>
<FONT color="green">031</FONT>                    PlanarConfig planarConfig = (PlanarConfig)config;<a name="line.31"></a>
<FONT color="green">032</FONT>                    Stack&lt;DependencyNode&gt; stack = planarConfig.getStack();<a name="line.32"></a>
<FONT color="green">033</FONT>                    Stack&lt;DependencyNode&gt; input = planarConfig.getInput();<a name="line.33"></a>
<FONT color="green">034</FONT>                    currentAction.getAction(actionContainers);<a name="line.34"></a>
<FONT color="green">035</FONT>                    Edge e = null;<a name="line.35"></a>
<FONT color="green">036</FONT>                    switch (transActionContainer.getActionCode()) {<a name="line.36"></a>
<FONT color="green">037</FONT>                    case LEFTARC:<a name="line.37"></a>
<FONT color="green">038</FONT>                            e = planarConfig.getDependencyStructure().addDependencyEdge(input.peek().getIndex(), stack.peek().getIndex());<a name="line.38"></a>
<FONT color="green">039</FONT>                            addEdgeLabels(e);<a name="line.39"></a>
<FONT color="green">040</FONT>                            break;<a name="line.40"></a>
<FONT color="green">041</FONT>                    case RIGHTARC:<a name="line.41"></a>
<FONT color="green">042</FONT>                            e = planarConfig.getDependencyStructure().addDependencyEdge(stack.peek().getIndex(), input.peek().getIndex());<a name="line.42"></a>
<FONT color="green">043</FONT>                            addEdgeLabels(e);<a name="line.43"></a>
<FONT color="green">044</FONT>                            break;<a name="line.44"></a>
<FONT color="green">045</FONT>                    case REDUCE:<a name="line.45"></a>
<FONT color="green">046</FONT>                            stack.pop();<a name="line.46"></a>
<FONT color="green">047</FONT>                            break;<a name="line.47"></a>
<FONT color="green">048</FONT>                    default: //SHIFT<a name="line.48"></a>
<FONT color="green">049</FONT>                            stack.push(input.pop()); <a name="line.49"></a>
<FONT color="green">050</FONT>                            break;<a name="line.50"></a>
<FONT color="green">051</FONT>                    }<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 GuideUserAction getDeterministicAction(GuideUserHistory history, ParserConfiguration config) throws MaltChainedException {<a name="line.54"></a>
<FONT color="green">055</FONT>                    //PlanarConfig planarConfig = (PlanarConfig)config;<a name="line.55"></a>
<FONT color="green">056</FONT>                    //if (planarConfig.getRootHandling() != PlanarConfig.NORMAL &amp;&amp; planarConfig.getStack().peek().isRoot()) {<a name="line.56"></a>
<FONT color="green">057</FONT>                    //      return updateActionContainers(history, Planar.SHIFT, null);<a name="line.57"></a>
<FONT color="green">058</FONT>                    //}<a name="line.58"></a>
<FONT color="green">059</FONT>                    //TODO: yeah, shift root<a name="line.59"></a>
<FONT color="green">060</FONT>                    return null;<a name="line.60"></a>
<FONT color="green">061</FONT>            }<a name="line.61"></a>
<FONT color="green">062</FONT>            <a name="line.62"></a>
<FONT color="green">063</FONT>            protected void addAvailableTransitionToTable(TransitionTable ttable) throws MaltChainedException {<a name="line.63"></a>
<FONT color="green">064</FONT>                    ttable.addTransition(SHIFT, "SH", false, null);<a name="line.64"></a>
<FONT color="green">065</FONT>                    ttable.addTransition(REDUCE, "RE", false, null);<a name="line.65"></a>
<FONT color="green">066</FONT>                    ttable.addTransition(RIGHTARC, "RA", true, null);<a name="line.66"></a>
<FONT color="green">067</FONT>                    ttable.addTransition(LEFTARC, "LA", true, null);<a name="line.67"></a>
<FONT color="green">068</FONT>            }<a name="line.68"></a>
<FONT color="green">069</FONT>            <a name="line.69"></a>
<FONT color="green">070</FONT>            protected void initWithDefaultTransitions(GuideUserHistory history) throws MaltChainedException {<a name="line.70"></a>
<FONT color="green">071</FONT>                    GuideUserAction currentAction = new ComplexDecisionAction((History)history);<a name="line.71"></a>
<FONT color="green">072</FONT>                    <a name="line.72"></a>
<FONT color="green">073</FONT>                    transActionContainer.setAction(SHIFT);<a name="line.73"></a>
<FONT color="green">074</FONT>                    transActionContainer.setAction(REDUCE);<a name="line.74"></a>
<FONT color="green">075</FONT>                    for (int i = 0; i &lt; arcLabelActionContainers.length; i++) {<a name="line.75"></a>
<FONT color="green">076</FONT>                            arcLabelActionContainers[i].setAction(-1);<a name="line.76"></a>
<FONT color="green">077</FONT>                    }<a name="line.77"></a>
<FONT color="green">078</FONT>                    currentAction.addAction(actionContainers);<a name="line.78"></a>
<FONT color="green">079</FONT>            }<a name="line.79"></a>
<FONT color="green">080</FONT>            <a name="line.80"></a>
<FONT color="green">081</FONT>            public String getName() {<a name="line.81"></a>
<FONT color="green">082</FONT>                    return "planar arc-eager";<a name="line.82"></a>
<FONT color="green">083</FONT>            }<a name="line.83"></a>
<FONT color="green">084</FONT>    <a name="line.84"></a>
<FONT color="green">085</FONT>            public boolean permissible(GuideUserAction currentAction, ParserConfiguration config) throws MaltChainedException {<a name="line.85"></a>
<FONT color="green">086</FONT>                    currentAction.getAction(actionContainers);<a name="line.86"></a>
<FONT color="green">087</FONT>                    int trans = transActionContainer.getActionCode();<a name="line.87"></a>
<FONT color="green">088</FONT>                    PlanarConfig planarConfig = (PlanarConfig)config;<a name="line.88"></a>
<FONT color="green">089</FONT>                    DependencyNode stackPeek = planarConfig.getStack().peek();<a name="line.89"></a>
<FONT color="green">090</FONT>                    DependencyNode inputPeek = planarConfig.getInput().peek();<a name="line.90"></a>
<FONT color="green">091</FONT>                    DependencyStructure dg = planarConfig.getDependencyGraph();<a name="line.91"></a>
<FONT color="green">092</FONT>                    //int rootHandling = planarConfig.getRootHandling();<a name="line.92"></a>
<FONT color="green">093</FONT>                    boolean singleHeadConstraint = planarConfig.requiresSingleHead();<a name="line.93"></a>
<FONT color="green">094</FONT>                    boolean noCoveredRootsConstraint = planarConfig.requiresNoCoveredRoots();<a name="line.94"></a>
<FONT color="green">095</FONT>                    boolean acyclicityConstraint = planarConfig.requiresAcyclicity();<a name="line.95"></a>
<FONT color="green">096</FONT>                    boolean connectednessConstraintOnReduce = planarConfig.requiresConnectednessCheckOnReduce();<a name="line.96"></a>
<FONT color="green">097</FONT>                    boolean connectednessConstraintOnShift = planarConfig.requiresConnectednessCheckOnShift();<a name="line.97"></a>
<FONT color="green">098</FONT>                    if ((trans == LEFTARC || trans == RIGHTARC) &amp;&amp; !isActionContainersLabeled()) {<a name="line.98"></a>
<FONT color="green">099</FONT>                            return false;<a name="line.99"></a>
<FONT color="green">100</FONT>                    }<a name="line.100"></a>
<FONT color="green">101</FONT>                    //if ((trans == LEFTARC || trans == REDUCE) &amp;&amp; stackPeek.isRoot()) { <a name="line.101"></a>
<FONT color="green">102</FONT>                    //      return false;<a name="line.102"></a>
<FONT color="green">103</FONT>                    //}<a name="line.103"></a>
<FONT color="green">104</FONT>                    if (trans == LEFTARC) {<a name="line.104"></a>
<FONT color="green">105</FONT>                            //avoid making root child of something<a name="line.105"></a>
<FONT color="green">106</FONT>                            if ( stackPeek.isRoot() ) <a name="line.106"></a>
<FONT color="green">107</FONT>                                    return false;<a name="line.107"></a>
<FONT color="green">108</FONT>                            //enforce single-head constraint if present<a name="line.108"></a>
<FONT color="green">109</FONT>                            if ( stackPeek.hasHead() &amp;&amp; singleHeadConstraint ) <a name="line.109"></a>
<FONT color="green">110</FONT>                                    return false;<a name="line.110"></a>
<FONT color="green">111</FONT>                            //avoid two links being created from and to the same node<a name="line.111"></a>
<FONT color="green">112</FONT>                            if ( stackPeek.hasHead() &amp;&amp; dg.getTokenNode(stackPeek.getIndex()).getHead().getIndex() == inputPeek.getIndex() )<a name="line.112"></a>
<FONT color="green">113</FONT>                                    return false;<a name="line.113"></a>
<FONT color="green">114</FONT>                            //enforce acyclicity constraint if present<a name="line.114"></a>
<FONT color="green">115</FONT>                            if ( acyclicityConstraint &amp;&amp; stackPeek.findComponent().getIndex() == inputPeek.findComponent().getIndex() )<a name="line.115"></a>
<FONT color="green">116</FONT>                                    return false;<a name="line.116"></a>
<FONT color="green">117</FONT>                    }<a name="line.117"></a>
<FONT color="green">118</FONT>                    if (trans == RIGHTARC) {<a name="line.118"></a>
<FONT color="green">119</FONT>                            //enforce single-head constraint if present<a name="line.119"></a>
<FONT color="green">120</FONT>                            if ( inputPeek.hasHead() &amp;&amp; singleHeadConstraint )<a name="line.120"></a>
<FONT color="green">121</FONT>                                    return false;<a name="line.121"></a>
<FONT color="green">122</FONT>                            //avoid two links being created from and to the same node<a name="line.122"></a>
<FONT color="green">123</FONT>                            if ( inputPeek.hasHead() &amp;&amp; dg.getTokenNode(inputPeek.getIndex()).getHead().getIndex() == stackPeek.getIndex() )<a name="line.123"></a>
<FONT color="green">124</FONT>                                    return false;<a name="line.124"></a>
<FONT color="green">125</FONT>                            //enforce acyclicity constraint if present<a name="line.125"></a>
<FONT color="green">126</FONT>                            if ( acyclicityConstraint &amp;&amp; stackPeek.findComponent().getIndex() == inputPeek.findComponent().getIndex() )<a name="line.126"></a>
<FONT color="green">127</FONT>                                    return false;<a name="line.127"></a>
<FONT color="green">128</FONT>                    }<a name="line.128"></a>
<FONT color="green">129</FONT>                    if (trans == REDUCE) {<a name="line.129"></a>
<FONT color="green">130</FONT>                            //do not reduce the dummy root<a name="line.130"></a>
<FONT color="green">131</FONT>                            if ( stackPeek.isRoot() ) <a name="line.131"></a>
<FONT color="green">132</FONT>                                    return false;<a name="line.132"></a>
<FONT color="green">133</FONT>                            //enforce no-covered-roots constraint if present<a name="line.133"></a>
<FONT color="green">134</FONT>                            if ( !stackPeek.hasHead() &amp;&amp; noCoveredRootsConstraint )<a name="line.134"></a>
<FONT color="green">135</FONT>                                    return false;<a name="line.135"></a>
<FONT color="green">136</FONT>                            //TODO does this line still make sense? (from Nivre arc-eager)<a name="line.136"></a>
<FONT color="green">137</FONT>                            //if ( !stackPeek.hasHead() &amp;&amp; rootHandling == PlanarConfig.STRICT ) <a name="line.137"></a>
<FONT color="green">138</FONT>                            //      return false;<a name="line.138"></a>
<FONT color="green">139</FONT>                            //enforce connectedness constraint if present<a name="line.139"></a>
<FONT color="green">140</FONT>                            if ( connectednessConstraintOnReduce )<a name="line.140"></a>
<FONT color="green">141</FONT>                            {<a name="line.141"></a>
<FONT color="green">142</FONT>                                    boolean path1 = ( stackPeek.findComponent().getIndex() == inputPeek.findComponent().getIndex() );<a name="line.142"></a>
<FONT color="green">143</FONT>                                    boolean path2;<a name="line.143"></a>
<FONT color="green">144</FONT>                                    if ( planarConfig.getStack().size() &lt; 2 ) path2=false;<a name="line.144"></a>
<FONT color="green">145</FONT>                                    else<a name="line.145"></a>
<FONT color="green">146</FONT>                                    {<a name="line.146"></a>
<FONT color="green">147</FONT>                                            DependencyNode stackPrev = planarConfig.getStack().get(planarConfig.getStack().size()-2);<a name="line.147"></a>
<FONT color="green">148</FONT>                                            path2 = stackPrev.findComponent().getIndex() == stackPeek.findComponent().getIndex();<a name="line.148"></a>
<FONT color="green">149</FONT>                                    }<a name="line.149"></a>
<FONT color="green">150</FONT>                                    return path1 || path2;<a name="line.150"></a>
<FONT color="green">151</FONT>                            }<a name="line.151"></a>
<FONT color="green">152</FONT>                    }<a name="line.152"></a>
<FONT color="green">153</FONT>                    if ( trans == SHIFT )<a name="line.153"></a>
<FONT color="green">154</FONT>                    {<a name="line.154"></a>
<FONT color="green">155</FONT>                            if ( connectednessConstraintOnShift &amp;&amp; planarConfig.getInput().size() == 1 ) //last word<a name="line.155"></a>
<FONT color="green">156</FONT>                            {<a name="line.156"></a>
<FONT color="green">157</FONT>                                    boolean path = ( planarConfig.getDependencyGraph().getTokenNode(1).findComponent().getIndex() == inputPeek.findComponent().getIndex() ); //require connection to 1st<a name="line.157"></a>
<FONT color="green">158</FONT>                                    return path;<a name="line.158"></a>
<FONT color="green">159</FONT>                            }<a name="line.159"></a>
<FONT color="green">160</FONT>                    }<a name="line.160"></a>
<FONT color="green">161</FONT>                    return true;<a name="line.161"></a>
<FONT color="green">162</FONT>            }<a name="line.162"></a>
<FONT color="green">163</FONT>            <a name="line.163"></a>
<FONT color="green">164</FONT>            public GuideUserAction defaultAction(GuideUserHistory history, ParserConfiguration configuration) throws MaltChainedException {<a name="line.164"></a>
<FONT color="green">165</FONT>                    return updateActionContainers(history, Planar.SHIFT, null);<a name="line.165"></a>
<FONT color="green">166</FONT>            }<a name="line.166"></a>
<FONT color="green">167</FONT>    }<a name="line.167"></a>




























































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