Populate parser/ hierarchy

[yangtools.git] / parser / yang-parser-rfc7950 / src / main / java / org / opendaylight / yangtools / yang / parser / rfc7950 / stmt / import_ / RevisionImport.java

diff --git a/parser/yang-parser-rfc7950/src/main/java/org/opendaylight/yangtools/yang/parser/rfc7950/stmt/import_/RevisionImport.java b/parser/yang-parser-rfc7950/src/main/java/org/opendaylight/yangtools/yang/parser/rfc7950/stmt/import_/RevisionImport.java
new file mode 100644 (file)
index 0000000..57f95ee
--- /dev/null
+++ b/parser/yang-parser-rfc7950/src/main/java/org/opendaylight/yangtools/yang/parser/rfc7950/stmt/import_/RevisionImport.java
@@ -0,0 +1,95 @@
+/*
+ * Copyright (c) 2017 Pantheon Technologies, s.r.o. and others.  All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+package org.opendaylight.yangtools.yang.parser.rfc7950.stmt.import_;
+
+import static org.opendaylight.yangtools.yang.parser.spi.meta.ModelProcessingPhase.SOURCE_LINKAGE;
+import static org.opendaylight.yangtools.yang.parser.spi.meta.StmtContextUtils.findFirstDeclaredSubstatement;
+import static org.opendaylight.yangtools.yang.parser.spi.meta.StmtContextUtils.firstAttributeOf;
+
+import java.util.Collection;
+import java.util.Optional;
+import org.opendaylight.yangtools.yang.common.Empty;
+import org.opendaylight.yangtools.yang.common.QNameModule;
+import org.opendaylight.yangtools.yang.common.Revision;
+import org.opendaylight.yangtools.yang.model.api.stmt.ImportEffectiveStatement;
+import org.opendaylight.yangtools.yang.model.api.stmt.ImportStatement;
+import org.opendaylight.yangtools.yang.model.api.stmt.PrefixStatement;
+import org.opendaylight.yangtools.yang.model.api.stmt.RevisionDateStatement;
+import org.opendaylight.yangtools.yang.model.repo.api.RevisionSourceIdentifier;
+import org.opendaylight.yangtools.yang.model.repo.api.SourceIdentifier;
+import org.opendaylight.yangtools.yang.parser.rfc7950.namespace.ModuleQNameToPrefix;
+import org.opendaylight.yangtools.yang.parser.spi.ModuleNamespace;
+import org.opendaylight.yangtools.yang.parser.spi.meta.InferenceException;
+import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder;
+import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder.InferenceAction;
+import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder.InferenceContext;
+import org.opendaylight.yangtools.yang.parser.spi.meta.ModelActionBuilder.Prerequisite;
+import org.opendaylight.yangtools.yang.parser.spi.meta.NamespaceKeyCriterion;
+import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext;
+import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext.Mutable;
+import org.opendaylight.yangtools.yang.parser.spi.source.ImportPrefixToModuleCtx;
+import org.opendaylight.yangtools.yang.parser.spi.source.ImportedModuleContext;
+import org.opendaylight.yangtools.yang.parser.spi.source.ModuleCtxToModuleQName;
+import org.opendaylight.yangtools.yang.parser.spi.source.ModuleCtxToSourceIdentifier;
+
+final class RevisionImport {
+    private RevisionImport() {
+        // Hidden on purpose
+    }
+
+    static void onLinkageDeclared(final Mutable<String, ImportStatement, ImportEffectiveStatement> stmt) {
+        final ModelActionBuilder importAction = stmt.newInferenceAction(SOURCE_LINKAGE);
+        final Prerequisite<StmtContext<?, ?, ?>> imported;
+        final String moduleName = stmt.getArgument();
+        final Revision revision = firstAttributeOf(stmt.declaredSubstatements(), RevisionDateStatement.class);
+        if (revision == null) {
+            imported = importAction.requiresCtx(stmt, ModuleNamespace.class,
+                NamespaceKeyCriterion.latestRevisionModule(moduleName), SOURCE_LINKAGE);
+        } else {
+            imported = importAction.requiresCtx(stmt, ModuleNamespace.class,
+                RevisionSourceIdentifier.create(moduleName, Optional.of(revision)), SOURCE_LINKAGE);
+        }
+
+        final Prerequisite<Mutable<?, ?, ?>> linkageTarget = importAction.mutatesCtx(stmt.getRoot(),
+            SOURCE_LINKAGE);
+
+        importAction.apply(new InferenceAction() {
+            @Override
+            public void apply(final InferenceContext ctx) {
+                final StmtContext<?, ?, ?> importedModule = imported.resolve(ctx);
+
+                final SourceIdentifier importedModuleIdentifier =
+                    stmt.getFromNamespace(ModuleCtxToSourceIdentifier.class, importedModule);
+                stmt.addToNs(ImportedVersionNamespace.class, Empty.getInstance(), importedModuleIdentifier);
+
+                final QNameModule mod = InferenceException.throwIfNull(stmt.getFromNamespace(
+                    ModuleCtxToModuleQName.class, importedModule), stmt, "Failed to find module of %s", importedModule);
+
+                linkageTarget.resolve(ctx).addToNs(ImportedModuleContext.class,
+                    importedModuleIdentifier, importedModule);
+                final String impPrefix = firstAttributeOf(stmt.declaredSubstatements(), PrefixStatement.class);
+                stmt.addToNs(ImportPrefixToModuleCtx.class, impPrefix, importedModule);
+                stmt.addToNs(ModuleQNameToPrefix.class, mod, impPrefix);
+            }
+
+            @Override
+            public void prerequisiteFailed(final Collection<? extends Prerequisite<?>> failed) {
+                if (failed.contains(imported)) {
+                    throw new InferenceException(stmt, "Imported module [%s] was not found.", moduleName);
+                }
+            }
+        });
+    }
+
+    static SourceIdentifier getImportedSourceIdentifier(final StmtContext<String, ImportStatement, ?> stmt) {
+        final StmtContext<Revision, ?, ?> revision = findFirstDeclaredSubstatement(stmt,
+            RevisionDateStatement.class);
+        return revision == null ? RevisionSourceIdentifier.create(stmt.argument())
+                : RevisionSourceIdentifier.create(stmt.argument(), revision.argument());
+    }
+}