Android Open Source - bad Block Expression

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License

The source code is released under:

Copyright (C) 2013 Madis Pink Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Softwa...

Java Source Code

package com.madisp.bad.expr;
/*from  ww  w.j a v  a 2  s . co  m*/
import com.madisp.bad.eval.BadScope;
import com.madisp.bad.eval.Scope;
import com.madisp.bad.eval.Watcher;
import java.util.List;

/**
 * Created with IntelliJ IDEA.
 * User: madis
 * Date: 5/12/13
 * Time: 3:24 PM
 */
public class BlockExpression implements Expression {
  private final Expression expr;
  private List<String> vars;

  public BlockExpression(Expression expression, List<String> vars) {
    this.vars = vars;
    this.expr = expression;
  }

  @Override
  public Object value(Scope scope) {
    return this;
  }

  @Override
  public void addWatcher(Scope scope, Watcher w) {
  }

  public Object yield(Scope scope, Object... args) {
    BadScope execScope = new BadScope(null, new Object());
    for (int i = 0; i < Math.min(args.length, vars.size()); i++) {
      execScope.setVar(null, vars.get(i), args[i]);
    }
    execScope.setParent(scope);
    return expr.value(execScope);
  }
}

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