package org.metaborg.meta.lang.dynsem.interpreter.nabl2;

import java.util.Optional;

import org.metaborg.meta.lang.dynsem.interpreter.nodes.building.TermBuild;
import org.metaborg.meta.nabl2.interpreter.InterpreterTerms;
import org.metaborg.meta.nabl2.stratego.StrategoTermIndices;
import org.metaborg.meta.nabl2.stratego.TermIndex;
import org.metaborg.meta.nabl2.terms.ITerm;
import org.metaborg.meta.nabl2.terms.generic.TB;
import org.spoofax.interpreter.terms.IStrategoTerm;

import com.oracle.truffle.api.source.SourceSection;

public abstract class NaBL2TermBuild extends TermBuild { 

    private final NaBL2Context context;

    public NaBL2TermBuild (SourceSection source) { 
        super(source);
        context = (NaBL2Context) getContext().readProperty(NaBL2Context.class.getName(), null);
        if (context == null) {
            throw new IllegalStateException("No NaBL2 context available. " +
                    "Does the language use NaBL2, and was the interpreter invoked using the correct runner?");
        }
    }

    protected IStrategoTerm getSolution() {
        return context.getStrategoTerms().toStratego(InterpreterTerms.context(context.getSolution()));
    }

    protected IStrategoTerm getAstProperty(IStrategoTerm sterm, String key) {
        TermIndex index = getTermIndex(sterm);
        ITerm keyterm = TB.newAppl(key);
        Optional<ITerm> val = context.getSolution().getAstProperties().getValue(index, keyterm);
        if(!val.isPresent()) { 
            throw new IllegalArgumentException("Node has no type.");
        }
        return context.getStrategoTerms().toStratego(val.get());
    }
 
    protected TermIndex getTermIndex(IStrategoTerm sterm) {
        if(sterm == null) { 
            throw new IllegalArgumentException("Primitive must be called on an AST node.");
        }
        return StrategoTermIndices.get(sterm).orElseThrow(() -> new IllegalArgumentException("Node has no index."));
    }
 
}
package org.metaborg.meta.lang.dynsem.interpreter.nabl2;

import java.util.Optional;

import org.metaborg.meta.lang.dynsem.interpreter.nodes.building.TermBuild;
import org.metaborg.meta.nabl2.interpreter.InterpreterTerms;
import org.metaborg.meta.nabl2.stratego.StrategoTermIndices;
import org.metaborg.meta.nabl2.stratego.TermIndex;
import org.metaborg.meta.nabl2.terms.ITerm;
import org.metaborg.meta.nabl2.terms.generic.TB;
import org.spoofax.interpreter.terms.IStrategoTerm;

import com.oracle.truffle.api.source.SourceSection;

public abstract class NaBL2TermBuild extends TermBuild { 

    private final NaBL2Context context;

    public NaBL2TermBuild (SourceSection source) { 
        super(source);
        context = (NaBL2Context) getContext().readProperty(NaBL2Context.class.getName(), null);
        if (context == null) {
            throw new IllegalStateException("No NaBL2 context available. " +
                    "Does the language use NaBL2, and was the interpreter invoked using the correct runner?");
        }
    }

    protected IStrategoTerm getSolution() {
        return context.getStrategoTerms().toStratego(InterpreterTerms.context(context.getSolution()));
    }

    protected IStrategoTerm getAstProperty(IStrategoTerm sterm, String key) {
        TermIndex index = getTermIndex(sterm);
        ITerm keyterm = TB.newAppl(key);
        Optional<ITerm> val = context.getSolution().astProperties().getValue(index, keyterm);
        if(!val.isPresent()) { 
            throw new IllegalArgumentException("Node has no type.");
        }
        return context.getStrategoTerms().toStratego(val.get());
    }
 
    protected TermIndex getTermIndex(IStrategoTerm sterm) {
        if(sterm == null) { 
            throw new IllegalArgumentException("Primitive must be called on an AST node.");
        }
        return StrategoTermIndices.get(sterm).orElseThrow(() -> new IllegalArgumentException("Node has no index."));
    }
 
}
Update method name.