How to use

Neo4jItemReader

in

org.springframework.batch.item.data

Assert.isTrue(this.maxItemCount > this.currentItemCount , "maxItemCount must be greater than currentItemCount");
Neo4jItemReader<T> reader = new Neo4jItemReader<>();
reader.setMatchStatement(this.matchStatement);
reader.setOrderByStatement(this.orderByStatement);
reader.setPageSize(this.pageSize);
reader.setParameterValues(this.parameterValues);
reader.setSessionFactory(this.sessionFactory);
reader.setTargetType(this.targetType);
reader.setStartStatement(this.startStatement);
reader.setReturnStatement(this.returnStatement);
reader.setWhereStatement(this.whereStatement);
reader.setName(this.name);
reader.setSaveState(this.saveState);
reader.setCurrentItemCount(this.currentItemCount);
reader.setMaxItemCount(this.maxItemCount);

private Neo4jItemReader<String> buildSessionBasedReader() throws Exception {
  Neo4jItemReader<String> reader = new Neo4jItemReader<>();
  reader.setSessionFactory(this.sessionFactory);
  reader.setTargetType(String.class);
  reader.setStartStatement("n=node(*)");
  reader.setReturnStatement("*");
  reader.setOrderByStatement("n.age");
  reader.setPageSize(50);
  reader.afterPropertiesSet();
  return reader;
}

@SuppressWarnings("serial")
@Test
public void testResultsWithMatchAndWhereWithSession() throws Exception {
  Neo4jItemReader<String> itemReader = buildSessionBasedReader();
  itemReader.setMatchStatement("n -- m");
  itemReader.setWhereStatement("has(n.name)");
  itemReader.setReturnStatement("m");
  itemReader.afterPropertiesSet();
  when(this.sessionFactory.openSession()).thenReturn(this.session);
  when(this.session.query(String.class, "START n=node(*) MATCH n -- m WHERE has(n.name) RETURN m ORDER BY n.age SKIP 0 LIMIT 50", null)).thenReturn(result);
  when(result.iterator()).thenReturn(Arrays.asList("foo", "bar", "baz").iterator());
  assertTrue(itemReader.doPageRead().hasNext());
}

Neo4jItemReader<String> reader = new Neo4jItemReader<>();
  reader.afterPropertiesSet();
  fail("SessionFactory was not set but exception was not thrown.");
} catch (IllegalStateException iae) {
reader.setSessionFactory(this.sessionFactory);
  reader.afterPropertiesSet();
  fail("Target Type was not set but exception was not thrown.");
} catch (IllegalStateException iae) {
reader.setTargetType(String.class);
  reader.afterPropertiesSet();
  fail("START was not set but exception was not thrown.");
} catch (IllegalStateException iae) {
reader.setStartStatement("n=node(*)");
  reader.afterPropertiesSet();
  fail("RETURN was not set but exception was not thrown.");
} catch (IllegalStateException iae) {
reader.setReturnStatement("n.name, n.phone");
  reader.afterPropertiesSet();
  fail("ORDER BY was not set but exception was not thrown.");
} catch (IllegalStateException iae) {

  @SuppressWarnings("serial")
  @Test
  public void testResultsWithMatchAndWhereWithParametersWithSession() throws Exception {
    Neo4jItemReader<String> itemReader = buildSessionBasedReader();
    Map<String, Object> params = new HashMap<>();
    params.put("foo", "bar");
    itemReader.setParameterValues(params);
    itemReader.setMatchStatement("n -- m");
    itemReader.setWhereStatement("has(n.name)");
    itemReader.setReturnStatement("m");
    itemReader.afterPropertiesSet();

    when(this.sessionFactory.openSession()).thenReturn(this.session);
    when(this.session.query(String.class, "START n=node(*) MATCH n -- m WHERE has(n.name) RETURN m ORDER BY n.age SKIP 0 LIMIT 50", params)).thenReturn(result);
    when(result.iterator()).thenReturn(Arrays.asList("foo", "bar", "baz").iterator());

    assertTrue(itemReader.doPageRead().hasNext());
  }
}

Assert.isTrue(this.maxItemCount > this.currentItemCount , "maxItemCount must be greater than currentItemCount");
Neo4jItemReader<T> reader = new Neo4jItemReader<>();
reader.setMatchStatement(this.matchStatement);
reader.setOrderByStatement(this.orderByStatement);
reader.setPageSize(this.pageSize);
reader.setParameterValues(this.parameterValues);
reader.setSessionFactory(this.sessionFactory);
reader.setTargetType(this.targetType);
reader.setStartStatement(this.startStatement);
reader.setReturnStatement(this.returnStatement);
reader.setWhereStatement(this.whereStatement);
reader.setName(this.name);
reader.setSaveState(this.saveState);
reader.setCurrentItemCount(this.currentItemCount);
reader.setMaxItemCount(this.maxItemCount);