26.5.1.1.3 Adding Additional Empty Vertex or Edge Providers

You can also add empty vertex or edge providers, without having the providers connected to any specific datasource.

The names and types of the properties of each empty provider can be specified programmatically. Similarly, you can also specify if a key mapping for the providers needs to be created.

Adding Additional Empty Vertex Providers

You can add an empty vertex provider by calling alterationBuilder.addEmptyVertexProvider(String vertexProviderName). You can then add properties, specify the key column, create the key mapping programmatically as shown in the following example.

See the GraphAlterationEmptyVertexProviderBuilder Interface in the Javadoc for more details.

• JShell
• Java

opg4j> alterationBuilder.addEmptyVertexProvider("AccountsProvider").
...>         setLabel("Accounts").
...>         createKeyMapping(true).
...>         addProperty("NAME", PropertyType.STRING)
$14 ==> oracle.pgx.api.graphalteration.internal.GraphAlterationEmptyVertexProviderBuilderImpl@4b3ea082

alterationBuilder.addEmptyVertexProvider("AccountsProvider")
        .setLabel("Accounts")
        .createKeyMapping(true)
        .addProperty("NAME", PropertyType.STRING);

Adding Additional Empty Edge Providers

You can add an empty edge provider by calling alterationBuilder.addEmptyEdgeProvider(String providerName, String sourceProvider, String destProvider). You can then add properties, specify the key column, create the key mapping programmatically as shown in the following example.

See the GraphAlterationEmptyEdgeProviderBuilder Interface in the Javadoc for more details.

• JShell
• Java

opg4j> alterationBuilder.addEmptyEdgeProvider("TransactionProvider", "Accounts", "Accounts").
...>         setLabel("Transfers").
...>         createKeyMapping(false). // set to false if no keys are needed
...>         addProperty("Description", PropertyType.STRING)
$26 ==> oracle.pgx.api.graphalteration.internal.GraphAlterationEmptyEdgeProviderBuilderImpl@54720caf

alterationBuilder.addEmptyEdgeProvider("TransactionProvider", "Accounts", "Accounts")
.setLabel("Transfers")
.createKeyMapping(false)
.addProperty("Description", PropertyType.STRING);