Examples with Compiler org.neo4j.ogm.cypher.compiler.Compiler used on opensource projects

Example 11 with Compiler

use of org.neo4j.ogm.cypher.compiler.Compiler in project neo4j-ogm by neo4j.

the class DirectRelationshipsTest method shouldBeAbleToRemoveContainedRelationshipOnly.

@Test
public void shouldBeAbleToRemoveContainedRelationshipOnly() {
    // given
    Folder folder = new Folder();
    Document doc1 = new Document();
    folder.getDocuments().add(doc1);
    folder.getArchived().add(doc1);
    doc1.setFolder(folder);
    folder.setId(0L);
    doc1.setId(1L);
    mappingContext.addNodeEntity(folder);
    mappingContext.addNodeEntity(doc1);
    mappingContext.addRelationship(new MappedRelationship(folder.getId(), "CONTAINS", doc1.getId(), null, Folder.class, Document.class));
    mappingContext.addRelationship(new MappedRelationship(folder.getId(), "ARCHIVED", doc1.getId(), null, Folder.class, Document.class));
    // when
    folder.getDocuments().remove(doc1);
    doc1.setFolder(null);
    // then
    assertThat(folder.getDocuments()).isEmpty();
    assertThat(folder.getArchived()).hasSize(1);
    Compiler compiler = mapper.map(folder).getCompiler();
    compiler.useStatementFactory(new RowStatementFactory());
    List<Statement> statements = compiler.deleteRelationshipStatements();
    assertThat(statements).hasSize(1);
    assertThat(statements.get(0).getStatement()).isEqualTo("UNWIND $rows as row MATCH (startNode) WHERE ID(startNode) = row.startNodeId WITH row,startNode MATCH (endNode) WHERE ID(endNode) = row.endNodeId MATCH (startNode)-[rel:`CONTAINS`]->(endNode) DELETE rel");
    mapper = new EntityGraphMapper(mappingMetadata, mappingContext);
    // There are no more changes to the graph
    compiler = mapper.map(doc1).getCompiler();
    compiler.useStatementFactory(new RowStatementFactory());
    statements = compiler.deleteRelationshipStatements();
    assertThat(statements).isEmpty();
}

Example 12 with Compiler

use of org.neo4j.ogm.cypher.compiler.Compiler in project neo4j-ogm by neo4j.

the class DirectRelationshipsTest method shouldNotBeAbleToCreateDuplicateRelationship.

@Test
public void shouldNotBeAbleToCreateDuplicateRelationship() {
    Folder folder = new Folder();
    Document document = new Document();
    document.setFolder(folder);
    // we try to store two identical references to the document object. Although this
    // is supported by the graph, it isn't currently supported by the OGM,
    // therefore we expect only one relationship to be persisted
    folder.getDocuments().add(document);
    folder.getDocuments().add(document);
    assertThat(folder.getDocuments()).hasSize(2);
    // save folder
    Compiler compiler = mapper.map(folder).getCompiler();
    compiler.useStatementFactory(new RowStatementFactory());
    List<Statement> statements = compiler.createNodesStatements();
    List<String> createNodeStatements = cypherStatements(statements);
    assertThat(createNodeStatements).hasSize(2);
    assertThat(createNodeStatements.contains("UNWIND $rows as row CREATE (n:`Folder`) SET n=row.props RETURN row.nodeRef as ref, ID(n) as id, $type as type")).isTrue();
    assertThat(createNodeStatements.contains("UNWIND $rows as row CREATE (n:`Document`) SET n=row.props RETURN row.nodeRef as ref, ID(n) as id, $type as type")).isTrue();
    for (Statement statement : statements) {
        List rows = (List) statement.getParameters().get("rows");
        assertThat(rows).hasSize(1);
    }
    statements = compiler.createRelationshipsStatements();
    List<String> createRelStatements = cypherStatements(statements);
    assertThat(createRelStatements).hasSize(1);
    assertThat(createRelStatements.get(0)).isEqualTo("UNWIND $rows as row MATCH (startNode) WHERE ID(startNode) = row.startNodeId WITH row,startNode MATCH (endNode) WHERE ID(endNode) = row.endNodeId MERGE (startNode)-[rel:`CONTAINS`]->(endNode) RETURN row.relRef as ref, ID(rel) as id, $type as type");
    List rows = (List) statements.get(0).getParameters().get("rows");
    assertThat(rows).hasSize(1);
    // save document
    compiler = mapper.map(document).getCompiler();
    compiler.useStatementFactory(new RowStatementFactory());
    statements = compiler.createNodesStatements();
    createNodeStatements = cypherStatements(statements);
    assertThat(createNodeStatements).hasSize(2);
    assertThat(createNodeStatements.contains("UNWIND $rows as row CREATE (n:`Folder`) SET n=row.props RETURN row.nodeRef as ref, ID(n) as id, $type as type")).isTrue();
    assertThat(createNodeStatements.contains("UNWIND $rows as row CREATE (n:`Document`) SET n=row.props RETURN row.nodeRef as ref, ID(n) as id, $type as type")).isTrue();
    for (Statement statement : statements) {
        rows = (List) statement.getParameters().get("rows");
        assertThat(rows).hasSize(1);
    }
    statements = compiler.createRelationshipsStatements();
    createRelStatements = cypherStatements(statements);
    assertThat(createRelStatements).hasSize(1);
    assertThat(createRelStatements.get(0)).isEqualTo("UNWIND $rows as row MATCH (startNode) WHERE ID(startNode) = row.startNodeId WITH row,startNode MATCH (endNode) WHERE ID(endNode) = row.endNodeId MERGE (startNode)-[rel:`CONTAINS`]->(endNode) RETURN row.relRef as ref, ID(rel) as id, $type as type");
    rows = (List) statements.get(0).getParameters().get("rows");
    assertThat(rows).hasSize(1);
}