yang/yang-parser-rfc7950/src/main/java/org/opendaylight/yangtools/yang/parser/rfc7950/stmt/pattern/PatternStatementSupport.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.pattern;
   9
  10 import static java.util.Objects.requireNonNull;
  11
  12 import com.google.common.annotations.Beta;
  13 import com.google.common.collect.ImmutableList;
  14 import java.util.regex.Pattern;
  15 import java.util.regex.PatternSyntaxException;
  16 import org.eclipse.jdt.annotation.NonNull;
  17 import org.opendaylight.yangtools.yang.model.api.YangStmtMapping;
  18 import org.opendaylight.yangtools.yang.model.api.meta.DeclaredStatement;
  19 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
  20 import org.opendaylight.yangtools.yang.model.api.stmt.PatternEffectiveStatement;
  21 import org.opendaylight.yangtools.yang.model.api.stmt.PatternExpression;
  22 import org.opendaylight.yangtools.yang.model.api.stmt.PatternStatement;
  23 import org.opendaylight.yangtools.yang.model.util.RegexUtils;
  24 import org.opendaylight.yangtools.yang.parser.rfc7950.stmt.BaseStatementSupport;
  25 import org.opendaylight.yangtools.yang.parser.spi.meta.EffectiveStmtCtx.Current;
  26 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext;
  27 import org.opendaylight.yangtools.yang.parser.spi.meta.SubstatementValidator;
  28 import org.opendaylight.yangtools.yang.parser.spi.source.SourceException;
  29
  30 @Beta
  31 public final class PatternStatementSupport
  32         extends BaseStatementSupport<PatternExpression, PatternStatement, PatternEffectiveStatement> {
  33     private static final @NonNull PatternStatementSupport RFC6020_INSTANCE = new PatternStatementSupport(
  34         SubstatementValidator.builder(YangStmtMapping.PATTERN)
  35             .addOptional(YangStmtMapping.DESCRIPTION)
  36             .addOptional(YangStmtMapping.ERROR_APP_TAG)
  37             .addOptional(YangStmtMapping.ERROR_MESSAGE)
  38             .addOptional(YangStmtMapping.REFERENCE)
  39             .build());
  40     private static final @NonNull PatternStatementSupport RFC7950_INSTANCE = new PatternStatementSupport(
  41         SubstatementValidator.builder(YangStmtMapping.PATTERN)
  42             .addOptional(YangStmtMapping.DESCRIPTION)
  43             .addOptional(YangStmtMapping.ERROR_APP_TAG)
  44             .addOptional(YangStmtMapping.ERROR_MESSAGE)
  45             .addOptional(YangStmtMapping.MODIFIER)
  46             .addOptional(YangStmtMapping.REFERENCE)
  47             .build());
  48
  49     private final SubstatementValidator validator;
  50
  51     private PatternStatementSupport(final SubstatementValidator validator) {
  52         super(YangStmtMapping.PATTERN, StatementPolicy.contextIndependent());
  53         this.validator = requireNonNull(validator);
  54     }
  55
  56     public static @NonNull PatternStatementSupport rfc6020Instance() {
  57         return RFC6020_INSTANCE;
  58     }
  59
  60     public static @NonNull PatternStatementSupport rfc7950Instance() {
  61         return RFC7950_INSTANCE;
  62     }
  63
  64     @Override
  65     public PatternExpression parseArgumentValue(final StmtContext<?, ?, ?> ctx, final String value) {
  66         final String pattern = RegexUtils.getJavaRegexFromXSD(value);
  67         try {
  68             Pattern.compile(pattern);
  69         } catch (final PatternSyntaxException e) {
  70             throw new SourceException(ctx, e, "Pattern \"%s\" failed to compile", pattern);
  71         }
  72         return PatternExpression.of(value, pattern);
  73     }
  74
  75     @Override
  76     protected SubstatementValidator getSubstatementValidator() {
  77         return validator;
  78     }
  79
  80     @Override
  81     protected PatternStatement createDeclared(final StmtContext<PatternExpression, PatternStatement, ?> ctx,
  82             final ImmutableList<? extends DeclaredStatement<?>> substatements) {
  83         return new RegularPatternStatement(ctx.getArgument(), substatements);
  84     }
  85
  86     @Override
  87     protected PatternStatement createEmptyDeclared(
  88             final StmtContext<PatternExpression, PatternStatement, ?> ctx) {
  89         return new EmptyPatternStatement(ctx.getArgument());
  90     }
  91
  92     @Override
  93     protected PatternEffectiveStatement createEffective(final Current<PatternExpression, PatternStatement> stmt,
  94             final ImmutableList<? extends EffectiveStatement<?, ?>> substatements) {
  95         return substatements.isEmpty() ? new EmptyPatternEffectiveStatement(stmt.declared())
  96             : new RegularPatternEffectiveStatement(stmt.declared(), substatements);
  97     }
  98 }