yang/yang-parser-rfc7950/src/main/java/org/opendaylight/yangtools/yang/parser/rfc7950/stmt/extension/ExtensionStatementSupport.java

   1 /*
   2  * Copyright (c) 2017 Pantheon Technologies, s.r.o. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8 package org.opendaylight.yangtools.yang.parser.rfc7950.stmt.extension;
   9
  10 import static com.google.common.base.Verify.verify;
  11 import static com.google.common.base.Verify.verifyNotNull;
  12
  13 import com.google.common.collect.ImmutableList;
  14 import java.util.IdentityHashMap;
  15 import java.util.Map;
  16 import java.util.stream.Stream;
  17 import org.opendaylight.yangtools.openconfig.model.api.OpenConfigStatements;
  18 import org.opendaylight.yangtools.yang.common.QName;
  19 import org.opendaylight.yangtools.yang.model.api.YangStmtMapping;
  20 import org.opendaylight.yangtools.yang.model.api.meta.DeclaredStatement;
  21 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
  22 import org.opendaylight.yangtools.yang.model.api.stmt.ArgumentStatement;
  23 import org.opendaylight.yangtools.yang.model.api.stmt.ExtensionEffectiveStatement;
  24 import org.opendaylight.yangtools.yang.model.api.stmt.ExtensionStatement;
  25 import org.opendaylight.yangtools.yang.model.api.stmt.YinElementStatement;
  26 import org.opendaylight.yangtools.yang.parser.spi.ExtensionNamespace;
  27 import org.opendaylight.yangtools.yang.parser.spi.meta.AbstractQNameStatementSupport;
  28 import org.opendaylight.yangtools.yang.parser.spi.meta.EffectiveStmtCtx.Current;
  29 import org.opendaylight.yangtools.yang.parser.spi.meta.StatementDefinitionNamespace;
  30 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext;
  31 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext.Mutable;
  32 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContextUtils;
  33 import org.opendaylight.yangtools.yang.parser.spi.meta.SubstatementValidator;
  34
  35 public final class ExtensionStatementSupport
  36         extends AbstractQNameStatementSupport<ExtensionStatement, ExtensionEffectiveStatement> {
  37     private static final SubstatementValidator SUBSTATEMENT_VALIDATOR = SubstatementValidator.builder(YangStmtMapping
  38         .EXTENSION)
  39         .addOptional(YangStmtMapping.ARGUMENT)
  40         .addOptional(YangStmtMapping.DESCRIPTION)
  41         .addOptional(YangStmtMapping.REFERENCE)
  42         .addOptional(YangStmtMapping.STATUS)
  43         .build();
  44     private static final ExtensionStatementSupport INSTANCE = new ExtensionStatementSupport();
  45     private static final ThreadLocal<Map<Current<?, ?>, ExtensionEffectiveStatementImpl>> TL_BUILDERS =
  46             new ThreadLocal<>();
  47
  48     private ExtensionStatementSupport() {
  49         super(YangStmtMapping.EXTENSION, StatementPolicy.reject());
  50     }
  51
  52     public static ExtensionStatementSupport getInstance() {
  53         return INSTANCE;
  54     }
  55
  56     @Override
  57     public QName parseArgumentValue(final StmtContext<?,?,?> ctx, final String value) {
  58         return StmtContextUtils.parseIdentifier(ctx, value);
  59     }
  60
  61     @Override
  62     public void onStatementDefinitionDeclared(
  63             final Mutable<QName, ExtensionStatement, ExtensionEffectiveStatement> stmt) {
  64         super.onStatementDefinitionDeclared(stmt);
  65
  66         QName stmtName = stmt.getArgument();
  67         if (OpenConfigStatements.OPENCONFIG_VERSION.getStatementName().isEqualWithoutRevision(stmtName)) {
  68             stmtName = stmtName.withoutRevision();
  69         }
  70
  71         stmt.addContext(ExtensionNamespace.class, stmtName, stmt);
  72
  73         final StmtContext<QName, ?, ?> argument = StmtContextUtils.findFirstDeclaredSubstatement(stmt,
  74             ArgumentStatement.class);
  75         final StmtContext<Boolean, ?, ?> yinElement = StmtContextUtils.findFirstDeclaredSubstatement(stmt,
  76             YinElementStatement.class);
  77
  78         stmt.addToNs(StatementDefinitionNamespace.class, stmt.argument(),
  79             new ModelDefinedStatementSupport(new ModelDefinedStatementDefinition(stmt.getArgument(),
  80                 argument != null ? argument.argument() : null, yinElement != null && yinElement.getArgument())));
  81     }
  82
  83     @Override
  84     protected SubstatementValidator getSubstatementValidator() {
  85         return SUBSTATEMENT_VALIDATOR;
  86     }
  87
  88     @Override
  89     protected ExtensionStatement createDeclared(final StmtContext<QName, ExtensionStatement, ?> ctx,
  90             final ImmutableList<? extends DeclaredStatement<?>> substatements) {
  91         return new RegularExtensionStatement(ctx.getArgument(), substatements);
  92     }
  93
  94     @Override
  95     protected ExtensionStatement createEmptyDeclared(final StmtContext<QName, ExtensionStatement, ?> ctx) {
  96         return new EmptyExtensionStatement(ctx.getArgument());
  97     }
  98
  99     @Override
 100     public ExtensionEffectiveStatement createEffective(final Current<QName, ExtensionStatement> stmt,
 101             final Stream<? extends StmtContext<?, ?, ?>> declaredSubstatements,
 102             final Stream<? extends StmtContext<?, ?, ?>> effectiveSubstatements) {
 103         Map<Current<?, ?>, ExtensionEffectiveStatementImpl> tl = TL_BUILDERS.get();
 104         if (tl == null) {
 105             tl = new IdentityHashMap<>();
 106             TL_BUILDERS.set(tl);
 107         }
 108
 109         final ExtensionEffectiveStatementImpl existing = tl.get(stmt);
 110         if (existing != null) {
 111             // Implies non-empty map, no cleanup necessary
 112             return existing;
 113         }
 114
 115         try {
 116             final ExtensionEffectiveStatementImpl created = new ExtensionEffectiveStatementImpl(stmt.declared(),
 117                 stmt.wrapSchemaPath());
 118             verify(tl.put(stmt, created) == null);
 119             try {
 120                 return super.createEffective(stmt, declaredSubstatements, effectiveSubstatements);
 121             } finally {
 122                 verify(tl.remove(stmt) == created);
 123             }
 124         } finally {
 125             if (tl.isEmpty()) {
 126                 TL_BUILDERS.remove();
 127             }
 128         }
 129     }
 130
 131     @Override
 132     protected ExtensionEffectiveStatement createEffective(final Current<QName, ExtensionStatement> stmt,
 133             final ImmutableList<? extends EffectiveStatement<?, ?>> substatements) {
 134         final ExtensionEffectiveStatementImpl ret = verifyNotNull(verifyNotNull(TL_BUILDERS.get(),
 135             "Statement build state not initialized").get(stmt), "No build state found for %s", stmt);
 136         ret.setSubstatements(substatements);
 137         return ret;
 138     }
 139 }