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package org.mvel2.ast;

import org.mvel2.ParserContext;
import org.mvel2.integration.VariableResolverFactory;
import org.mvel2.util.CompilerTools;

public class Instance extends ASTNode {

    private ASTNode stmt;
    private ASTNode clsStmt;

    public Instance(ASTNode stmt, ASTNode clsStmt, ParserContext pCtx) {
        super(pCtx);
        this.stmt = stmt;
        this.clsStmt = clsStmt;
        CompilerTools.expectType(pCtx, clsStmt, Class.class, true);
    }

    public Object getReducedValueAccelerated(Object ctx, Object thisValue, VariableResolverFactory factory) {
        return ((Class) clsStmt.getReducedValueAccelerated(ctx, thisValue, factory))
                .isInstance(stmt.getReducedValueAccelerated(ctx, thisValue, factory));
    }

    public Object getReducedValue(Object ctx, Object thisValue, VariableResolverFactory factory) {
        try {
            Class i = (Class) clsStmt.getReducedValue(ctx, thisValue, factory);
            if (i == null) throw new ClassCastException();

            return i.isInstance(stmt.getReducedValue(ctx, thisValue, factory));
        } catch (ClassCastException e) {
            throw new RuntimeException("not a class reference: " + clsStmt.getName());
        }

    }

    public Class getEgressType() {
        return Boolean.class;
    }

    public ASTNode getStatement() {
        return stmt;
    }

    public ASTNode getClassStatement() {
        return clsStmt;
    }
}