BUG-1041 cli proposal #1

[controller.git] / opendaylight / netconf / netconf-cli / src / main / java / org / opendaylight / controller / netconf / cli / CommandArgHandlerRegistry.java

diff --git a/opendaylight/netconf/netconf-cli/src/main/java/org/opendaylight/controller/netconf/cli/CommandArgHandlerRegistry.java b/opendaylight/netconf/netconf-cli/src/main/java/org/opendaylight/controller/netconf/cli/CommandArgHandlerRegistry.java
new file mode 100644 (file)
index 0000000..2eab22a
--- /dev/null
+++ b/opendaylight/netconf/netconf-cli/src/main/java/org/opendaylight/controller/netconf/cli/CommandArgHandlerRegistry.java
@@ -0,0 +1,153 @@
+/*
+ * Copyright (c) 2014 Cisco Systems, Inc. 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.controller.netconf.cli;
+
+import com.google.common.base.Optional;
+import com.google.common.base.Preconditions;
+import com.google.common.collect.Maps;
+import java.util.Map;
+import org.opendaylight.controller.netconf.cli.io.ConsoleIO;
+import org.opendaylight.controller.netconf.cli.reader.Reader;
+import org.opendaylight.controller.netconf.cli.reader.custom.ConfigReader;
+import org.opendaylight.controller.netconf.cli.reader.custom.EditContentReader;
+import org.opendaylight.controller.netconf.cli.reader.custom.FilterReader;
+import org.opendaylight.controller.netconf.cli.reader.custom.PasswordReader;
+import org.opendaylight.controller.netconf.cli.reader.impl.GenericReader;
+import org.opendaylight.controller.netconf.cli.writer.OutFormatter;
+import org.opendaylight.controller.netconf.cli.writer.Writer;
+import org.opendaylight.controller.netconf.cli.writer.custom.DataWriter;
+import org.opendaylight.controller.netconf.cli.writer.impl.NormalizedNodeWriter;
+import org.opendaylight.yangtools.yang.model.api.DataSchemaNode;
+import org.opendaylight.yangtools.yang.model.api.SchemaContext;
+
+/**
+ * Keeps custom and generic input/output arguments handlers. Custom handlers are
+ * constructed lazily, due to remote schema context acquisition.
+ */
+public class CommandArgHandlerRegistry {
+
+    private final ConsoleIO consoleIO;
+    private final SchemaContextRegistry schemaContextRegistry;
+
+    private final Map<Class<? extends Reader<? extends DataSchemaNode>>, ReaderProvider> customReaders = Maps
+            .newHashMap();
+    private final Map<Class<? extends Writer<DataSchemaNode>>, WriterProvider> customWriters = Maps.newHashMap();
+
+    public CommandArgHandlerRegistry(final ConsoleIO consoleIO, final SchemaContextRegistry schemaContextRegistry) {
+        this.consoleIO = consoleIO;
+        this.schemaContextRegistry = schemaContextRegistry;
+
+        setUpReaders();
+        setUpWriters();
+    }
+
+    private void setUpWriters() {
+        customWriters.put(DataWriter.class, new DataWriterProvider());
+    }
+
+    private void setUpReaders() {
+        customReaders.put(PasswordReader.class, new PasswordReaderProvider());
+        customReaders.put(FilterReader.class, new FilterReaderProvider());
+        customReaders.put(ConfigReader.class, new ConfigReaderProvider());
+        customReaders.put(EditContentReader.class, new EditContentReaderProvider());
+    }
+
+    public synchronized Reader<? extends DataSchemaNode> getCustomReader(
+            final Class<? extends Reader<DataSchemaNode>> readerType) {
+        return customReaders.get(readerType).provide(consoleIO, this, schemaContextRegistry);
+    }
+
+    private static SchemaContext getRemoteSchema(final Class<?> handlerType,
+            final SchemaContextRegistry schemaContextRegistry) {
+        final Optional<SchemaContext> remoteSchemaContext = schemaContextRegistry.getRemoteSchemaContext();
+        Preconditions.checkState(remoteSchemaContext.isPresent(),
+                "Remote schema context not acquired yet, cannot get handler %s", handlerType);
+        return remoteSchemaContext.get();
+    }
+
+    public synchronized Reader<DataSchemaNode> getGenericReader(final SchemaContext schemaContext) {
+        return new GenericReader(consoleIO, this, schemaContext);
+    }
+
+    public synchronized Reader<DataSchemaNode> getGenericReader(final SchemaContext schemaContext,
+            final boolean readConfigNode) {
+        return new GenericReader(consoleIO, this, schemaContext, readConfigNode);
+    }
+
+    public synchronized Writer<DataSchemaNode> getCustomWriter(final Class<? extends Writer<DataSchemaNode>> writerType) {
+        return customWriters.get(writerType).provide(consoleIO, getRemoteSchema(writerType, schemaContextRegistry),
+                this);
+    }
+
+    public synchronized Writer<DataSchemaNode> getGenericWriter() {
+        return new NormalizedNodeWriter(consoleIO, new OutFormatter());
+    }
+
+    /**
+     * Reader providers, in order to construct readers lazily
+     */
+    private static interface ReaderProvider {
+        Reader<? extends DataSchemaNode> provide(ConsoleIO consoleIO,
+                final CommandArgHandlerRegistry commandArgHandlerRegistry,
+                final SchemaContextRegistry schemaContextRegistry);
+    }
+
+    private static final class FilterReaderProvider implements ReaderProvider {
+        @Override
+        public Reader<? extends DataSchemaNode> provide(final ConsoleIO consoleIO,
+                final CommandArgHandlerRegistry commandArgHandlerRegistry,
+                final SchemaContextRegistry schemaContextRegistry) {
+            return new FilterReader(consoleIO, getRemoteSchema(FilterReader.class, schemaContextRegistry));
+        }
+    }
+
+    private static final class ConfigReaderProvider implements ReaderProvider {
+        @Override
+        public Reader<? extends DataSchemaNode> provide(final ConsoleIO consoleIO,
+                final CommandArgHandlerRegistry commandArgHandlerRegistry,
+                final SchemaContextRegistry schemaContextRegistry) {
+            return new ConfigReader(consoleIO, getRemoteSchema(ConfigReader.class, schemaContextRegistry),
+                    commandArgHandlerRegistry);
+        }
+    }
+
+    private static final class EditContentReaderProvider implements ReaderProvider {
+        @Override
+        public Reader<? extends DataSchemaNode> provide(final ConsoleIO consoleIO,
+                final CommandArgHandlerRegistry commandArgHandlerRegistry,
+                final SchemaContextRegistry schemaContextRegistry) {
+            return new EditContentReader(consoleIO, commandArgHandlerRegistry, getRemoteSchema(EditContentReader.class,
+                    schemaContextRegistry));
+        }
+    }
+
+    private static final class PasswordReaderProvider implements ReaderProvider {
+        @Override
+        public Reader<? extends DataSchemaNode> provide(final ConsoleIO consoleIO,
+                final CommandArgHandlerRegistry commandArgHandlerRegistry,
+                final SchemaContextRegistry schemaContextRegistry) {
+            return new PasswordReader(consoleIO, schemaContextRegistry.getLocalSchemaContext());
+        }
+    }
+
+    /**
+     * Writer providers, in order to construct readers lazily
+     */
+    private static interface WriterProvider {
+        Writer<DataSchemaNode> provide(ConsoleIO consoleIO, SchemaContext schema,
+                final CommandArgHandlerRegistry commandArgHandlerRegistry);
+    }
+
+    private class DataWriterProvider implements WriterProvider {
+        @Override
+        public Writer<DataSchemaNode> provide(final ConsoleIO consoleIO, final SchemaContext schema,
+                final CommandArgHandlerRegistry commandArgHandlerRegistry) {
+            return new DataWriter(consoleIO, new OutFormatter(), schema);
+        }
+    }
+}