我定义了自己的语法。我正在尝试使用Groovy脚本语言来评估派生。 这是我的班级：
package org.moeaframework.examples.ga.EvaluationRule;
import java.io.IOException;
import java.io.StringReader;
import java.util.ArrayList;
import java.util.Random;
import javax.script.Bindings;
import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;
import javax.script.ScriptException;
import javax.script.SimpleBindings;
import org.moeaframework.core.Problem;
import org.moeaframework.core.Solution;
import org.moeaframework.core.variable.Grammar;
import org.moeaframework.util.grammar.ContextFreeGrammar;
import org.moeaframework.util.grammar.Parser;
//import org.moeaframework.util.Vector;
public class Myprob2 implements Problem {
static Random number_generator = new Random();
private ContextFreeGrammar grammar;
int source_index0 = number_generator.nextInt(Input.Context().length);
//String Cont = null;
int source_index1 = number_generator.nextInt(Input.Context().length);
//String metr = null;
int source_index2 = number_generator.nextInt(Input.Context().length);
//String prob = null;
//double source_index = number_generator.nextDouble();
static final String GRAMMAR =
"<rules> ::= 'IF' ' ' <context> ' ' <op> ' ' <val> ' and ' <metrics>' ' <op> ' '<val1> ' Then ' <problem> \n" +
"<context> ::= Cont \n" +
"<op> ::= '>' | '<' \n" +
"<val> ::= 'H' | 'M' | 'L' \n" +
"<metrics> ::= metr \n" +
"<val1> ::= source_index \n" +
"<problem> ::= prob ";
public Myprob2() {
super();
try {
grammar = Parser.load( new StringReader(GRAMMAR));
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
ArrayList<String> strs =new ArrayList<String>();
public void evaluate(Solution solution) {
int nbr_prob =0;
String result = null;
int[] codon = ((Grammar)solution.getVariable(0)).toArray();
// derive the program using the codon
String program = grammar.build(codon);
//System.out.println("$$$$$$$$$$"+program);
if (program == null) {
// if null, the codon did not produce a valid grammar
// TODO: penalize the objective value
} else {
ScriptEngineManager sem = new ScriptEngineManager();
ScriptEngine engine = sem.getEngineByName("groovy");
// initialize the variables used by the program
Bindings b = new SimpleBindings();
b.put("Cont", Input.Context()[source_index0]);
b.put("metr", Input.Metrics()[source_index1]);
b.put("source_index", number_generator.nextDouble());
b.put("prob", Input.Problem()[source_index2]);
try {
result = ((String)engine.eval(program, b)).toString();
} catch (ScriptException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
//System.out.println("tessttt"+b);
// TODO: use the result to set the objective value
strs.add(result);
//System.out.println(str);
for(int i=0; i<strs.size();i++)
{ String str2 = strs.get(i);
for(int j=1; j<strs.size()-1;j++)
{ if(strs.get(j).compareTo(str2)!=0)
{ nbr_prob++; }
}
}
solution.setObjective(0, -nbr_prob);
//solution.setObjective(0,rules.size());
}
}
@Override
public String getName() {
return "Myprob";
}
public Solution newSolution() {
Solution solution = new Solution(1, 1);
solution.setVariable(0, new Grammar(10));
return solution;
}
@Override
public void close() {
//do nothing
}
}
}
我收到以下错误：
at org.codehaus.groovy.jsr223.GroovyScriptEngineImpl.eval(GroovyScriptEngineImpl.java:151)
at javax.script.AbstractScriptEngine.eval(Unknown Source)
at org.moeaframework.examples.ga.EvaluationRule.Myprob2.evaluate(Myprob2.java:97)
at org.moeaframework.util.distributed.DistributedProblem$ProblemEvaluator.call(DistributedProblem.java:99)
at org.moeaframework.util.distributed.DistributedProblem$ProblemEvaluator.call(DistributedProblem.java:1)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
Script59.groovy: 1: unexpected token: Cont @ line 1, column 4.
IF Cont > M and metr > source_index Then prob
^
1 error
at org.codehaus.groovy.control.ErrorCollector.failIfErrors(ErrorCollector.java:309)
at org.codehaus.groovy.control.ErrorCollector.addFatalError(ErrorCollector.java:149)
at org.codehaus.groovy.control.ErrorCollector.addError(ErrorCollector.java:119)
at org.codehaus.groovy.control.ErrorCollector.addError(ErrorCollector.java:131)
at org.codehaus.groovy.control.SourceUnit.addError(SourceUnit.java:359)
at org.codehaus.groovy.antlr.AntlrParserPlugin.transformCSTIntoAST(AntlrParserPlugin.java:142)
at org.codehaus.groovy.antlr.AntlrParserPlugin.parseCST(AntlrParserPlugin.java:108)
at org.codehaus.groovy.control.SourceUnit.parse(SourceUnit.java:236)
at org.codehaus.groovy.control.CompilationUnit$1.call(CompilationUnit.java:164)
at org.codehaus.groovy.control.CompilationUnit.applyToSourceUnits(CompilationUnit.java:928)
at org.codehaus.groovy.control.CompilationUnit.doPhaseOperation(CompilationUnit.java:590)
at org.codehaus.groovy.control.CompilationUnit.processPhaseOperations(CompilationUnit.java:566)
at org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:543)
at groovy.lang.GroovyClassLoader.doParseClass(GroovyClassLoader.java:297)
at groovy.lang.GroovyClassLoader.parseClass(GroovyClassLoader.java:267)
at groovy.lang.GroovyClassLoader.parseClass(GroovyClassLoader.java:253)
at groovy.lang.GroovyClassLoader.parseClass(GroovyClassLoader.java:211)
at org.codehaus.groovy.jsr223.GroovyScriptEngineImpl.getScriptClass(GroovyScriptEngineImpl.java:366)
at org.codehaus.groovy.jsr223.GroovyScriptEngineImpl.eval(GroovyScriptEngineImpl.java:143)
... 8 more
javax.script.ScriptException: javax.script.ScriptException: groovy.lang.MissingPropertyException: No such property: H for class: Script56
at org.codehaus.groovy.jsr223.GroovyScriptEngineImpl.eval(GroovyScriptEngineImpl.java:151)
at javax.script.AbstractScriptEngine.eval(Unknown Source)
at org.moeaframework.examples.ga.EvaluationRule.Myprob2.evaluate(Myprob2.java:97)
at org.moeaframework.util.distributed.DistributedProblem$ProblemEvaluator.call(DistributedProblem.java:99)
at org.moeaframework.util.distributed.DistributedProblem$ProblemEvaluator.call(DistributedProblem.java:1)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: javax.script.ScriptException: groovy.lang.MissingPropertyException: No such property: H for class: Script56
at org.codehaus.groovy.jsr223.GroovyScriptEngineImpl.eval(GroovyScriptEngineImpl.java:347)
at org.codehaus.groovy.jsr223.GroovyScriptEngineImpl.eval(GroovyScriptEngineImpl.java:145)
... 8 more
Caused by: groovy.lang.MissingPropertyException: No such property: H for class: Script56
at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.unwrap(ScriptBytecodeAdapter.java:51)
at org.codehaus.groovy.runtime.callsite.PogoGetPropertySite.getProperty(PogoGetPropertySite.java:49)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callGroovyObjectGetProperty(AbstractCallSite.java:304)
at Script56.run(Script56.groovy:1)
at org.codehaus.groovy.jsr223.GroovyScriptEngineImpl.eval(GroovyScriptEngineImpl.java:344)
... 9 more
javax.script.ScriptException: javax.script.ScriptException: groovy.lang.MissingPropertyException: No such property: L for class: Script58
at org.codehaus.groovy.jsr223.GroovyScriptEngineImpl.eval(GroovyScriptEngineImpl.java:151)
at javax.script.AbstractScriptEngine.eval(Unknown Source)
at org.moeaframework.examples.ga.EvaluationRule.Myprob2.evaluate(Myprob2.java:97)
at org.moeaframework.util.distributed.DistributedProblem$ProblemEvaluator.call(DistributedProblem.java:99)
at org.moeaframework.util.distributed.DistributedProblem$ProblemEvaluator.call(DistributedProblem.java:1)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: javax.script.ScriptException: groovy.lang.MissingPropertyException: No such property: L for class: Script58
at org.codehaus.groovy.jsr223.GroovyScriptEngineImpl.eval(GroovyScriptEngineImpl.java:347)
at org.codehaus.groovy.jsr223.GroovyScriptEngineImpl.eval(GroovyScriptEngineImpl.java:145)
... 8 more
Caused by: groovy.lang.MissingPropertyException: No such property: L for class: Script58
at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.unwrap(ScriptBytecodeAdapter.java:51)
at org.codehaus.groovy.runtime.callsite.PogoGetPropertySite.getProperty(PogoGetPropertySite.java:49)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callGroovyObjectGetProperty(AbstractCallSite.java:304)
at Script58.run(Script58.groovy:1)
at org.codehaus.groovy.jsr223.GroovyScriptEngineImpl.eval(GroovyScriptEngineImpl.java:344)
... 9 more
javax.script.ScriptException: javax.script.ScriptException: groovy.lang.MissingPropertyException: No such property: L for class: Script54
at org.codehaus.groovy.jsr223.GroovyScriptEngineImpl.eval(GroovyScriptEngineImpl.java:151)
at javax.script.AbstractScriptEngine.eval(Unknown Source)
at org.moeaframework.examples.ga.EvaluationRule.Myprob2.evaluate(Myprob2.java:97)
at org.moeaframework.util.distributed.DistributedProblem$ProblemEvaluator.call(DistributedProblem.java:99)
at org.moeaframework.util.distributed.DistributedProblem$ProblemEvaluator.call(DistributedProblem.java:1)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: javax.script.ScriptException: groovy.lang.MissingPropertyException: No such property: L for class: Script54
at org.codehaus.groovy.jsr223.GroovyScriptEngineImpl.eval(GroovyScriptEngineImpl.java:347)
at org.codehaus.groovy.jsr223.GroovyScriptEngineImpl.eval(GroovyScriptEngineImpl.java:145)
... 8 more
Caused by: groovy.lang.MissingPropertyException: No such property: L for class: Script54
at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.unwrap(ScriptBytecodeAdapter.java:51)
at org.codehaus.groovy.runtime.callsite.PogoGetPropertySite.getProperty(PogoGetPropertySite.java:49)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callGroovyObjectGetProperty(AbstractCallSite.java:304)
at Script54.run(Script54.groovy:1)
at org.codehaus.groovy.jsr223.GroovyScriptEngineImpl.eval(GroovyScriptEngineImpl.java:344)
... 9 more
javax.script.ScriptException: org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
Script62.groovy: 1: unexpected token: Cont @ line 1, column 4.
IF Cont > L and metr < source_index Then prob
^
1 error
at org.codehaus.groovy.jsr223.GroovyScriptEngineImpl.eval(GroovyScriptEngineImpl.java:151)
at javax.script.AbstractScriptEngine.eval(Unknown Source)
at org.moeaframework.examples.ga.EvaluationRule.Myprob2.evaluate(Myprob2.java:97)
at org.moeaframework.util.distributed.DistributedProblem$ProblemEvaluator.call(DistributedProblem.java:99)
at org.moeaframework.util.distributed.DistributedProblem$ProblemEvaluator.call(DistributedProblem.java:1)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
Script62.groovy: 1: unexpected token: Cont @ line 1, column 4.
IF Cont > L and metr < source_index Then prob
^
1 error
at org.codehaus.groovy.control.ErrorCollector.failIfErrors(ErrorCollector.java:309)
at org.codehaus.groovy.control.ErrorCollector.addFatalError(ErrorCollector.java:149)
at org.codehaus.groovy.control.ErrorCollector.addError(ErrorCollector.java:119)
at org.codehaus.groovy.control.ErrorCollector.addError(ErrorCollector.java:131)
at org.codehaus.groovy.control.SourceUnit.addError(SourceUnit.java:359)
at org.codehaus.groovy.antlr.AntlrParserPlugin.transformCSTIntoAST(AntlrParserPlugin.java:142)
at org.codehaus.groovy.antlr.AntlrParserPlugin.parseCST(AntlrParserPlugin.java:108)
at org.codehaus.groovy.control.SourceUnit.parse(SourceUnit.java:236)
at org.codehaus.groovy.control.CompilationUnit$1.call(CompilationUnit.java:164)
at org.codehaus.groovy.control.CompilationUnit.applyToSourceUnits(CompilationUnit.java:928)
at org.codehaus.groovy.control.CompilationUnit.doPhaseOperation(CompilationUnit.java:590)
at org.codehaus.groovy.control.CompilationUnit.processPhaseOperations(CompilationUnit.java:566)
at org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:543)
at groovy.lang.GroovyClassLoader.doParseClass(GroovyClassLoader.java:297)
at groovy.lang.GroovyClassLoader.parseClass(GroovyClassLoader.java:267)
at groovy.lang.GroovyClassLoader.parseClass(GroovyClassLoader.java:253)
at groovy.lang.GroovyClassLoader.parseClass(GroovyClassLoader.java:211)
at org.codehaus.groovy.jsr223.GroovyScriptEngineImpl.getScriptClass(GroovyScriptEngineImpl.java:366)
at org.codehaus.groovy.jsr223.GroovyScriptEngineImpl.eval(GroovyScriptEngineImpl.java:143)
... 8 more
javax.script.ScriptException: org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
Script63.groovy: 1: unexpected token: Cont @ line 1, column 4.
IF Cont > M and metr < source_index Then prob
^
1 error
at org.codehaus.groovy.jsr223.GroovyScriptEngineImpl.eval(GroovyScriptEngineImpl.java:151)
at javax.script.AbstractScriptEngine.eval(Unknown Source)
at org.moeaframework.examples.ga.EvaluationRule.Myprob2.evaluate(Myprob2.java:97)
at org.moeaframework.util.distributed.DistributedProblem$ProblemEvaluator.call(DistributedProblem.java:99)
at org.moeaframework.util.distributed.DistributedProblem$ProblemEvaluator.call(DistributedProblem.java:1)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
Script63.groovy: 1: unexpected token: Cont @ line 1, column 4.
IF Cont > M and metr < source_index Then prob
^
1 error
at org.codehaus.groovy.control.ErrorCollector.failIfErrors(ErrorCollector.java:309)
at org.codehaus.groovy.control.ErrorCollector.addFatalError(ErrorCollector.java:149)
at org.codehaus.groovy.control.ErrorCollector.addError(ErrorCollector.java:119)
at org.codehaus.groovy.control.ErrorCollector.addError(ErrorCollector.java:131)
at org.codehaus.groovy.control.SourceUnit.addError(SourceUnit.java:359)
at org.codehaus.groovy.antlr.AntlrParserPlugin.transformCSTIntoAST(AntlrParserPlugin.java:142)
at org.codehaus.groovy.antlr.AntlrParserPlugin.parseCST(AntlrParserPlugin.java:108)
at org.codehaus.groovy.control.SourceUnit.parse(SourceUnit.java:236)
at org.codehaus.groovy.control.CompilationUnit$1.call(CompilationUnit.java:164)
at org.codehaus.groovy.control.CompilationUnit.applyToSourceUnits(CompilationUnit.java:928)
at org.codehaus.groovy.control.CompilationUnit.doPhaseOperation(CompilationUnit.java:590)
at org.codehaus.groovy.control.CompilationUnit.processPhaseOperations(CompilationUnit.java:566)
at org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:543)
at groovy.lang.GroovyClassLoader.doParseClass(GroovyClassLoader.java:297)
at groovy.lang.GroovyClassLoader.parseClass(GroovyClassLoader.java:267)
at groovy.lang.GroovyClassLoader.parseClass(GroovyClassLoader.java:253)
at groovy.lang.GroovyClassLoader.parseClass(GroovyClassLoader.java:211)
at org.codehaus.groovy.jsr223.GroovyScriptEngineImpl.getScriptClass(GroovyScriptEngineImpl.java:366)
at org.codehaus.groovy.jsr223.GroovyScriptEngineImpl.eval(GroovyScriptEngineImpl.java:143)
... 8 more
javax.script.ScriptException: org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
Script64.groovy: 1: unexpected token: Cont @ line 1, column 4.
IF Cont > L and metr > source_index Then prob
^
....................
请给我解决这个问题的想法。谢谢!!