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

   1 /*
   2  * Copyright (c) 2015 Cisco Systems, Inc. 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 import static java.util.Objects.requireNonNull;
  13
  14 import com.google.common.collect.ImmutableList;
  15 import java.util.ArrayDeque;
  16 import java.util.Deque;
  17 import org.eclipse.jdt.annotation.NonNull;
  18 import org.opendaylight.yangtools.yang.common.QName;
  19 import org.opendaylight.yangtools.yang.model.api.ExtensionDefinition;
  20 import org.opendaylight.yangtools.yang.model.api.SchemaPath;
  21 import org.opendaylight.yangtools.yang.model.api.Status;
  22 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
  23 import org.opendaylight.yangtools.yang.model.api.stmt.ArgumentEffectiveStatement;
  24 import org.opendaylight.yangtools.yang.model.api.stmt.ExtensionEffectiveStatement;
  25 import org.opendaylight.yangtools.yang.model.api.stmt.ExtensionStatement;
  26 import org.opendaylight.yangtools.yang.model.api.stmt.StatusEffectiveStatement;
  27 import org.opendaylight.yangtools.yang.model.api.stmt.YinElementEffectiveStatement;
  28 import org.opendaylight.yangtools.yang.parser.rfc7950.stmt.AbstractDeclaredEffectiveStatement.DefaultArgument;
  29 import org.opendaylight.yangtools.yang.parser.rfc7950.stmt.EffectiveStatementMixins.DocumentedNodeMixin;
  30
  31 final class ExtensionEffectiveStatementImpl extends DefaultArgument<QName, ExtensionStatement>
  32         implements ExtensionDefinition, ExtensionEffectiveStatement, DocumentedNodeMixin<QName, ExtensionStatement> {
  33     private static final class RecursionDetector extends ThreadLocal<Deque<ExtensionEffectiveStatementImpl>> {
  34         boolean check(final ExtensionEffectiveStatementImpl current) {
  35             final Deque<ExtensionEffectiveStatementImpl> stack = get();
  36             if (stack != null) {
  37                 for (ExtensionEffectiveStatementImpl s : stack) {
  38                     if (s == current) {
  39                         return true;
  40                     }
  41                 }
  42             }
  43             return false;
  44         }
  45
  46         void push(final ExtensionEffectiveStatementImpl current) {
  47             Deque<ExtensionEffectiveStatementImpl> stack = get();
  48             if (stack == null) {
  49                 stack = new ArrayDeque<>(1);
  50                 set(stack);
  51             }
  52
  53             stack.push(current);
  54         }
  55
  56         void pop() {
  57             Deque<ExtensionEffectiveStatementImpl> stack = get();
  58             stack.pop();
  59             if (stack.isEmpty()) {
  60                 remove();
  61             }
  62         }
  63     }
  64
  65     private static final RecursionDetector TOSTRING_DETECTOR = new RecursionDetector();
  66
  67     private final @NonNull SchemaPath path;
  68
  69     private volatile Object substatements;
  70
  71     ExtensionEffectiveStatementImpl(final ExtensionStatement declared, final SchemaPath path) {
  72         super(declared);
  73         this.path = requireNonNull(path);
  74     }
  75
  76     @Override
  77     public QName getQName() {
  78         return argument();
  79     }
  80
  81     @Override
  82     @Deprecated
  83     public SchemaPath getPath() {
  84         return path;
  85     }
  86
  87     @Override
  88     public String getArgument() {
  89         return findFirstEffectiveSubstatementArgument(ArgumentEffectiveStatement.class)
  90                 .map(QName::getLocalName)
  91                 .orElse(null);
  92     }
  93
  94     @Override
  95     public boolean isYinElement() {
  96         return findFirstEffectiveSubstatement(ArgumentEffectiveStatement.class)
  97                 .flatMap(arg -> arg.findFirstEffectiveSubstatementArgument(YinElementEffectiveStatement.class))
  98                 .orElse(Boolean.FALSE)
  99                 .booleanValue();
 100     }
 101
 102     @Override
 103     public ImmutableList<? extends EffectiveStatement<?, ?>> effectiveSubstatements() {
 104         final Object local = verifyNotNull(substatements, "Substatements are not yet initialized");
 105         return unmaskList(local);
 106     }
 107
 108     @Override
 109     public Status getStatus() {
 110         return findFirstEffectiveSubstatementArgument(StatusEffectiveStatement.class).orElse(Status.CURRENT);
 111     }
 112
 113     @Override
 114     public ExtensionEffectiveStatement asEffectiveStatement() {
 115         return this;
 116     }
 117
 118     @Override
 119     public String toString() {
 120         if (TOSTRING_DETECTOR.check(this)) {
 121             return recursedToString();
 122         }
 123
 124         TOSTRING_DETECTOR.push(this);
 125         try {
 126             return ExtensionEffectiveStatementImpl.class.getSimpleName() + "["
 127                     + "argument=" + getArgument()
 128                     + ", qname=" + getQName()
 129                     + ", schemaPath=" + path
 130                     + ", yin=" + isYinElement()
 131                     + ", extensionSchemaNodes=" + getUnknownSchemaNodes()
 132                     + "]";
 133         } finally {
 134             TOSTRING_DETECTOR.pop();
 135         }
 136     }
 137
 138     void setSubstatements(final ImmutableList<? extends EffectiveStatement<?, ?>> newSubstatements) {
 139         verify(substatements == null, "Substatements already initialized");
 140         substatements = maskList(newSubstatements);
 141     }
 142
 143     private String recursedToString() {
 144         return ExtensionEffectiveStatementImpl.class.getSimpleName() + "["
 145                 + "argument=" + getArgument()
 146                 + ", qname=" + getQName()
 147                 + ", schemaPath=" + path
 148                 + ", yin=" + isYinElement()
 149                 + " <RECURSIVE> ]";
 150     }
 151 }