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.rfc7950.stmt.BaseQNameStatementSupport;
  27 import org.opendaylight.yangtools.yang.parser.spi.ExtensionNamespace;
  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 BaseQNameStatementSupport<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     // FIXME: YANGTOOLS-1185: use EffectiveStmtCtx.Current as key
  46     private static final ThreadLocal<Map<StmtContext<?, ?, ?>, ExtensionEffectiveStatementImpl>> TL_BUILDERS =
  47             new ThreadLocal<>();
  48
  49     private ExtensionStatementSupport() {
  50         super(YangStmtMapping.EXTENSION);
  51     }
  52
  53     public static ExtensionStatementSupport getInstance() {
  54         return INSTANCE;
  55     }
  56
  57     @Override
  58     public QName parseArgumentValue(final StmtContext<?,?,?> ctx, final String value) {
  59         return StmtContextUtils.parseIdentifier(ctx, value);
  60     }
  61
  62     @Override
  63     public void onStatementDefinitionDeclared(
  64             final Mutable<QName, ExtensionStatement, ExtensionEffectiveStatement> stmt) {
  65         super.onStatementDefinitionDeclared(stmt);
  66
  67         QName stmtName = stmt.getArgument();
  68         if (OpenConfigStatements.OPENCONFIG_VERSION.getStatementName().isEqualWithoutRevision(stmtName)) {
  69             stmtName = stmtName.withoutRevision();
  70         }
  71
  72         stmt.addContext(ExtensionNamespace.class, stmtName, stmt);
  73
  74         final StmtContext<QName, ?, ?> argument = StmtContextUtils.findFirstDeclaredSubstatement(stmt,
  75             ArgumentStatement.class);
  76         final StmtContext<Boolean, ?, ?> yinElement = StmtContextUtils.findFirstDeclaredSubstatement(stmt,
  77             YinElementStatement.class);
  78
  79         stmt.addToNs(StatementDefinitionNamespace.class, stmt.argument(),
  80             new ModelDefinedStatementSupport(new ModelDefinedStatementDefinition(stmt.getArgument(),
  81                 argument != null ? argument.argument() : null, yinElement != null && yinElement.getArgument())));
  82     }
  83
  84     @Override
  85     protected SubstatementValidator getSubstatementValidator() {
  86         return SUBSTATEMENT_VALIDATOR;
  87     }
  88
  89     @Override
  90     protected ExtensionStatement createDeclared(final StmtContext<QName, ExtensionStatement, ?> ctx,
  91             final ImmutableList<? extends DeclaredStatement<?>> substatements) {
  92         return new RegularExtensionStatement(ctx.getArgument(), substatements);
  93     }
  94
  95     @Override
  96     protected ExtensionStatement createEmptyDeclared(final StmtContext<QName, ExtensionStatement, ?> ctx) {
  97         return new EmptyExtensionStatement(ctx.getArgument());
  98     }
  99
 100     @Override
 101     public ExtensionEffectiveStatement createEffective(final Current<QName, ExtensionStatement> stmt,
 102             final Stream<? extends StmtContext<?, ?, ?>> declaredSubstatements,
 103             final Stream<? extends StmtContext<?, ?, ?>> effectiveSubstatements) {
 104         Map<StmtContext<?, ?, ?>, ExtensionEffectiveStatementImpl> tl = TL_BUILDERS.get();
 105         if (tl == null) {
 106             tl = new IdentityHashMap<>();
 107             TL_BUILDERS.set(tl);
 108         }
 109
 110         final StmtContext<?, ?, ?> ctx = stmt.caerbannog();
 111         final ExtensionEffectiveStatementImpl existing = tl.get(ctx);
 112         if (existing != null) {
 113             // Implies non-empty map, no cleanup necessary
 114             return existing;
 115         }
 116
 117         try {
 118             final ExtensionEffectiveStatementImpl created = new ExtensionEffectiveStatementImpl(stmt.declared(),
 119                 stmt.getSchemaPath());
 120             verify(tl.put(ctx, created) == null);
 121             try {
 122                 return super.createEffective(stmt, declaredSubstatements, effectiveSubstatements);
 123             } finally {
 124                 verify(tl.remove(ctx) == created);
 125             }
 126         } finally {
 127             if (tl.isEmpty()) {
 128                 TL_BUILDERS.remove();
 129             }
 130         }
 131     }
 132
 133     @Override
 134     protected ExtensionEffectiveStatement createEffective(final Current<QName, ExtensionStatement> stmt,
 135             final ImmutableList<? extends EffectiveStatement<?, ?>> substatements) {
 136         final ExtensionEffectiveStatementImpl ret = verifyNotNull(verifyNotNull(TL_BUILDERS.get(),
 137             "Statement build state not initialized").get(stmt.caerbannog()), "No build state found for %s", stmt);
 138         ret.setSubstatements(substatements);
 139         return ret;
 140     }
 141 }