59 lines
1.5 KiB
Java
59 lines
1.5 KiB
Java
package dk.itu.mario.level.generator;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import java.util.Random;
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import java.util.Set;
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import java.util.TreeSet;
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public class LevelGrammar {
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private Variable start;
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private Map<Variable, ProductionRule> ruleMap = new HashMap<Variable, ProductionRule>();
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private Set<Variable> variables = new TreeSet<Variable>();
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public void addVariable(Variable var) {
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if (variables.contains(var)) {
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throw new IllegalArgumentException(
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"Grammar already contains variable: " + var);
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}
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variables.add(var);
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}
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public void addProductionRule(ProductionRule rule) {
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if (ruleMap.containsKey(rule.getLHS())) {
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throw new IllegalArgumentException(
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"Grammar already contains rule with LHS: " + rule.getLHS());
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}
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ruleMap.put(rule.getLHS(), rule);
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}
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public String generateRandom(long randomSeed) {
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System.out.println("Generating random level parameters using seed: "
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+ randomSeed);
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List<Variable> startRuleRHS = getRule(getStart()).getRHS();
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StringBuilder sb = new StringBuilder();
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for (Variable var : startRuleRHS) {
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sb.append(var.toString());
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}
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return sb.toString();
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}
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public String generateRandom() {
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System.out.println("Creating new random seed for LevelGrammar");
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return generateRandom(new Random().nextLong());
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}
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public ProductionRule getRule(Variable var) {
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return ruleMap.get(var);
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}
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public Variable getStart() {
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return start;
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}
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public void setStart(Variable start) {
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this.start = start;
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}
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}
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