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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.searchlib.treenet.rule;
import java.util.Map;
/**
* @author Simon Thoresen Hult
*/
public class TreeNet {
// The id of the first tree to run in this net.
private String begin;
// All named trees of this net.
private final Map<String, Tree> trees;
/**
* Constructs a new tree net.
*
* @param begin The id of the first tree to run in this net.
* @param trees All named trees of this net.
*/
public TreeNet(String begin, Map<String, Tree> trees) {
this.begin = begin;
this.trees = trees;
for (Tree tree : this.trees.values()) {
tree.setParent(this);
}
}
/**
* Returns the id of the first tree to run in this net.
*/
public String getBegin() {
return begin;
}
/**
* Returns all named trees of this net.
*/
public Map<String, Tree> getTrees() {
return trees;
}
/**
* Returns a ranking expression equivalent of this net.
*/
public String toRankingExpression() {
StringBuilder ret = new StringBuilder();
String next = begin;
while (next != null) {
Tree tree = trees.get(next);
if (tree.getBegin() != null) {
if (ret.length() > 0) {
ret.append(" + \n");
}
ret.append(tree.toRankingExpression());
}
next = tree.getNext();
}
return ret.toString();
}
}
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