[jOOQ/jOOQ#10472] Add LazySchema and LazyCatalog to allow for lazy referencing a schema or catalog in generated code

jOOQ/src/main/java/org/jooq/impl/LazyCatalog.java

@@ -0,0 +1,117 @@
+/*
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * Other licenses:
+ * -----------------------------------------------------------------------------
+ * Commercial licenses for this work are available. These replace the above
+ * ASL 2.0 and offer limited warranties, support, maintenance, and commercial
+ * database integrations.
+ *
+ * For more information, please visit: http://www.jooq.org/licenses
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ */
+package org.jooq.impl;
+
+import java.util.List;
+import java.util.concurrent.Callable;
+import java.util.stream.Stream;
+
+import org.jooq.Catalog;
+import org.jooq.Context;
+import org.jooq.Internal;
+import org.jooq.Name;
+import org.jooq.Schema;
+
+/**
+ * A schema that references a lazy initialisable {@link Catalog} singleton, for
+ * use in generated code.
+ *
+ * @author Lukas Eder
+ */
+@Internal
+public final class LazyCatalog extends AbstractNamed implements Catalog {
+
+    /**
+     * Generated UID
+     */
+    private static final long serialVersionUID = -2260128711891951254L;
+
+    final Callable<Catalog>   callable;
+    transient Catalog         catalog;
+
+    public LazyCatalog(Name name, Callable<Catalog> callable) {
+        super(name, CommentImpl.NO_COMMENT);
+
+        this.callable = callable;
+    }
+
+    private final Catalog catalog() {
+        if (catalog == null) {
+            try {
+                catalog = callable.call();
+            }
+            catch (Exception e) {
+                throw new RuntimeException(e);
+            }
+        }
+
+        return catalog;
+    }
+
+    // -------------------------------------------------------------------------
+    // XXX: QueryPart API
+    // -------------------------------------------------------------------------
+
+    @Override
+    public final void accept(Context<?> ctx) {
+        ctx.visit(catalog());
+    }
+
+    // -------------------------------------------------------------------------
+    // XXX: Schema API
+    // -------------------------------------------------------------------------
+
+    @Override
+    public final List<Schema> getSchemas() {
+        return catalog().getSchemas();
+    }
+
+    @Override
+    public final Schema getSchema(String name) {
+        return catalog().getSchema(name);
+    }
+
+
+
+    @Override
+    public final Stream<Schema> schemaStream() {
+        return catalog().schemaStream();
+    }
+
+
+}

jOOQ/src/main/java/org/jooq/impl/LazySchema.java

@@ -0,0 +1,184 @@
+/*
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * Other licenses:
+ * -----------------------------------------------------------------------------
+ * Commercial licenses for this work are available. These replace the above
+ * ASL 2.0 and offer limited warranties, support, maintenance, and commercial
+ * database integrations.
+ *
+ * For more information, please visit: http://www.jooq.org/licenses
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ *
+ */
+package org.jooq.impl;
+
+import java.util.List;
+import java.util.concurrent.Callable;
+import java.util.stream.Stream;
+
+import org.jooq.Catalog;
+import org.jooq.Comment;
+import org.jooq.Context;
+import org.jooq.Domain;
+import org.jooq.Internal;
+import org.jooq.Name;
+import org.jooq.Schema;
+import org.jooq.Sequence;
+import org.jooq.Table;
+import org.jooq.UDT;
+
+/**
+ * A schema that references a lazy initialisable {@link Schema} singleton, for
+ * use in generated code.
+ *
+ * @author Lukas Eder
+ */
+@Internal
+public final class LazySchema extends AbstractNamed implements Schema {
+
+    /**
+     * Generated UID
+     */
+    private static final long serialVersionUID = -2260128711891951254L;
+
+    final Callable<Schema>    callable;
+    transient Schema          schema;
+
+    public LazySchema(Name name, Comment comment, Callable<Schema> callable) {
+        super(name, comment);
+
+        this.callable = callable;
+    }
+
+    private final Schema schema() {
+        if (schema == null) {
+            try {
+                schema = callable.call();
+            }
+            catch (Exception e) {
+                throw new RuntimeException(e);
+            }
+        }
+
+        return schema;
+    }
+
+    // -------------------------------------------------------------------------
+    // XXX: QueryPart API
+    // -------------------------------------------------------------------------
+
+    @Override
+    public final void accept(Context<?> ctx) {
+        ctx.visit(schema());
+    }
+
+    // -------------------------------------------------------------------------
+    // XXX: Schema API
+    // -------------------------------------------------------------------------
+
+    @Override
+    public final Catalog getCatalog() {
+        return schema().getCatalog();
+    }
+
+
+
+    @Override
+    public final Stream<Table<?>> tableStream() {
+        return schema().tableStream();
+    }
+
+
+
+    @Override
+    public final List<Table<?>> getTables() {
+        return schema().getTables();
+    }
+
+    @Override
+    public final Table<?> getTable(String name) {
+        return schema().getTable(name);
+    }
+
+
+
+    @Override
+    public final Stream<UDT<?>> udtStream() {
+        return schema().udtStream();
+    }
+
+
+
+    @Override
+    public final List<UDT<?>> getUDTs() {
+        return schema().getUDTs();
+    }
+
+    @Override
+    public final UDT<?> getUDT(String name) {
+        return schema().getUDT(name);
+    }
+
+
+
+    @Override
+    public final Stream<Domain<?>> domainStream() {
+        return schema().domainStream();
+    }
+
+
+
+    @Override
+    public final List<Domain<?>> getDomains() {
+        return schema().getDomains();
+    }
+
+    @Override
+    public final Domain<?> getDomain(String name) {
+        return schema().getDomain(name);
+    }
+
+
+
+    @Override
+    public final Stream<Sequence<?>> sequenceStream() {
+        return schema().sequenceStream();
+    }
+
+
+
+    @Override
+    public final List<Sequence<?>> getSequences() {
+        return schema().getSequences();
+    }
+
+    @Override
+    public final Sequence<?> getSequence(String name) {
+        return schema().getSequence(name);
+    }
+}