Recuparar uma propriedade do Objeto Enum no Hibernate

/**
 * @author Fernando Gomes <[email removido]> [09/01/2007]
 * @hibernate.class table="avaliacao_trabalho"
 */
public class AvaliacaoTrabalho implements Loggable, Serializable {
	private Long id;

	private Trabalho trabalho;

	private boolean preventiva;

	private boolean corretiva;

	private boolean agenteMudanca;

	private boolean consultoria;

	private boolean fiscalizadora;

	private String consideracoes;

	private Avaliacao avaliacao;

	private boolean finalizada;
	
	private Date dataAvaliacao;

	public enum Avaliacao {
		OTIMO("Ótimo"), 
		BOM("Bom"), 
		REGULAR("Regular"), 
		PESSIMA("Péssima");

		private String valor;

		Avaliacao(String valor) {
			this.valor = valor;
		}

		public String getValor() {
			return valor;
		}

		public String toString() {
			return valor;
		}
	}

	/**
	 * Constructor
	 */
	public AvaliacaoTrabalho() {
	}
	
	/**
	 * @return
	 */
	public Avaliacao getAvaliacao() {
		return this.avaliacao;
	}

	
	/**
	 * @param avaliacao
	 */
	public void setAvaliacaoHibernate(String avaliacao) {
		if (avaliacao == null) {
			this.avaliacao = null;
		} else {
			for (Avaliacao aval : Avaliacao.values()) {
				if (avaliacao.trim().equals(aval.getValor())) {
					this.avaliacao = aval;
					return;
				}
			}
		}
	}
	
}

public List<AvaliacaoTrabalho> findTrabalhosByAvaliacao(Collection<String> param) {
		// TODO Auto-generated method stub
		
		String sql = "from AvaliacaoTrabalho as avaliacaoTrab " +
		   "inner join avaliacaoTrab.trabalho as t " +
		   "inner join t.relatorioAuditoria as rel " +
		   "where avaliacaoTrab.avaliacao like ? or avaliacaoTrab.avaliacao like ?";
		
		List<AvaliacaoTrabalho> trabalhos = getHibernateTemplate().find(sql, param.toArray());
		
		return trabalhos.size() > 0 ? trabalhos : null;
	}

Caused by: org.hibernate.QueryException: could not resolve property: avaliacao of: com.navita.suzano.auditoria.model.entity.AvaliacaoTrabalho [from com.navita.suzano.auditoria.model.entity.AvaliacaoTrabalho as avaliacaoTrab inner join avaliacaoTrab.trabalho as t inner join t.relatorioAuditoria as rel where avaliacaoTrab.avaliacao.valor like ? or avaliacaoTrab.avaliacao.valor like ?]
	at org.hibernate.persister.entity.AbstractPropertyMapping.throwPropertyException(AbstractPropertyMapping.java:43)
	at org.hibernate.persister.entity.AbstractPropertyMapping.toType(AbstractPropertyMapping.java:37)
	at org.hibernate.persister.entity.AbstractEntityPersister.toType(AbstractEntityPersister.java:1265)
	at org.hibernate.hql.ast.tree.FromElementType.getPropertyType(FromElementType.java:279)
	at org.hibernate.hql.ast.tree.FromElement.getPropertyType(FromElement.java:372)
	at org.hibernate.hql.ast.tree.DotNode.getDataType(DotNode.java:539)
	at org.hibernate.hql.ast.tree.DotNode.prepareLhs(DotNode.java:221)
	at org.hibernate.hql.ast.tree.DotNode.resolve(DotNode.java:172)
	at org.hibernate.hql.ast.tree.DotNode.resolveFirstChild(DotNode.java:139)
	at org.hibernate.hql.ast.HqlSqlWalker.lookupProperty(HqlSqlWalker.java:462)
	at org.hibernate.hql.antlr.HqlSqlBaseWalker.addrExpr(HqlSqlBaseWalker.java:4316)
	at org.hibernate.hql.antlr.HqlSqlBaseWalker.expr(HqlSqlBaseWalker.java:1211)
	at org.hibernate.hql.antlr.HqlSqlBaseWalker.exprOrSubquery(HqlSqlBaseWalker.java:4032)
	at org.hibernate.hql.antlr.HqlSqlBaseWalker.comparisonExpr(HqlSqlBaseWalker.java:3662)
	at org.hibernate.hql.antlr.HqlSqlBaseWalker.logicalExpr(HqlSqlBaseWalker.java:1758)
	at org.hibernate.hql.antlr.HqlSqlBaseWalker.logicalExpr(HqlSqlBaseWalker.java:1708)
	at org.hibernate.hql.antlr.HqlSqlBaseWalker.whereClause(HqlSqlBaseWalker.java:776)
	at org.hibernate.hql.antlr.HqlSqlBaseWalker.query(HqlSqlBaseWalker.java:577)
	at org.hibernate.hql.antlr.HqlSqlBaseWalker.selectStatement(HqlSqlBaseWalker.java:281)
	at org.hibernate.hql.antlr.HqlSqlBaseWalker.statement(HqlSqlBaseWalker.java:229)
	at org.hibernate.hql.ast.QueryTranslatorImpl.analyze(QueryTranslatorImpl.java:218)
	at org.hibernate.hql.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:158)
	at org.hibernate.hql.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:109)
	at org.hibernate.engine.query.HQLQueryPlan.<init>(HQLQueryPlan.java:75)
	at org.hibernate.engine.query.HQLQueryPlan.<init>(HQLQueryPlan.java:54)
	at org.hibernate.engine.query.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:71)
	at org.hibernate.impl.AbstractSessionImpl.getHQLQueryPlan(AbstractSessionImpl.java:133)
	at org.hibernate.impl.AbstractSessionImpl.createQuery(AbstractSessionImpl.java:112)
	at org.hibernate.impl.SessionImpl.createQuery(SessionImpl.java:1583)
	at org.springframework.orm.hibernate3.HibernateTemplate$31.doInHibernate(HibernateTemplate.java:846)
	at org.springframework.orm.hibernate3.HibernateTemplate.execute(HibernateTemplate.java:366)
	... 81 more