Create querydsl predicate from map - spring-data

Question

I need help creating a predicate to use with Spring data and querydsl. I'm in the process of converting Daos to Repositorys. And I came across one that has a dynamic query in it. I can create a predicate from a list, but I'm lost at how to create a a dynamic predicate from a map. Here is the code from the DaoImpl that I'm converting from:
public Set<String> getDocumentsByDocumentAssociation(Map.Entry<String,String>[] associations) {
String queryStr = "SELECT da FROM DocumentExternalAssocEntity as da WHERE";
StringBuilder sb = new StringBuilder(queryStr);
//loop through inputs. for first loop, skip appending the OR statements. Append OR for all others
for ( int i = 0; i < associations.length; i++ ){
if ( i > 0 ) {
sb.append(" OR");
}
String whereString = " (da.associationtype = :docAssocType" + i + " AND da.associationvalue = :docAssocValue" + i + ")";
sb.append(whereString);
}
//query when previous loop is done appending
final Query query = em.createQuery(sb.toString());
for( int i = 0; i < associations.length; i++ ) {
query.setParameter("docAssocType" + i, associations[i].getKey());
query.setParameter("docAssocValue" + i, associations[i].getValue());
}
And here is the relevant generated class:
private static final long serialVersionUID = 1971644089L;
public static final QDocumentExternalAssocEntity documentExternalAssocEntity = new QDocumentExternalAssocEntity("documentExternalAssocEntity");
public final StringPath associationtype = createString("associationtype");
public final StringPath associationvalue = createString("associationvalue");
Thanks, and let me know if you need any additional info

Answer 1

This should do it:
BooleanExpression expr = null;
for ( int i = 0; i < associations.length; i++ ){
BooleanExpression innerExpr =
documentExternalAssocEntity.associationtype.eq(associations[i].getKey())
.and(documentExternalAssocEntity.associationvalue.eq(associations[i].getValue()))
if (expr == null) {
expr = innerExpr;
} else {
expr = expr.or(innerExpr);
}
}