ExpBinaria.java

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package plp.expressions1.expression;

public abstract class ExpBinaria implements Expressao {

        private Expressao esq;

        private Expressao dir;

        private String operador;

        public ExpBinaria(Expressao esq, Expressao dir, String operador) {
                this.esq = esq;
                this.dir = dir;
                this.operador = operador;
        }

        public Expressao getEsq() {
                return esq;
        }

        public Expressao getDir() {
                return dir;
        }

        public String getOperador() {
                return operador;
        }

        public String toString() {
                StringBuffer sb = new StringBuffer();
                sb.append(esq.toString());
                sb.append(' ');
                sb.append(operador);
                sb.append(' ');
                sb.append(dir.toString());
                return sb.toString();
        }

        public boolean checaTipo() {
                boolean result;
                if (!getEsq().checaTipo() || !getDir().checaTipo()) {
                        result = false;
                }
                else {
                        result = this.checaTipoElementoTerminal();
                }
                return result;
        }
        
        protected abstract boolean checaTipoElementoTerminal();


}

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