yang/yang-parser-impl/src/main/java/org/opendaylight/yangtools/yang/parser/stmt/rfc6020/PatternStatementImpl.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.stmt.rfc6020;
   9
  10 import com.google.common.base.Optional;
  11 import java.util.regex.Pattern;
  12 import java.util.regex.PatternSyntaxException;
  13 import org.opendaylight.yangtools.yang.model.api.Rfc6020Mapping;
  14 import org.opendaylight.yangtools.yang.model.api.meta.EffectiveStatement;
  15 import org.opendaylight.yangtools.yang.model.api.stmt.DescriptionStatement;
  16 import org.opendaylight.yangtools.yang.model.api.stmt.ErrorAppTagStatement;
  17 import org.opendaylight.yangtools.yang.model.api.stmt.ErrorMessageStatement;
  18 import org.opendaylight.yangtools.yang.model.api.stmt.PatternStatement;
  19 import org.opendaylight.yangtools.yang.model.api.stmt.ReferenceStatement;
  20 import org.opendaylight.yangtools.yang.model.api.type.PatternConstraint;
  21 import org.opendaylight.yangtools.yang.parser.spi.meta.AbstractDeclaredStatement;
  22 import org.opendaylight.yangtools.yang.parser.spi.meta.AbstractStatementSupport;
  23 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext;
  24 import org.opendaylight.yangtools.yang.parser.stmt.rfc6020.effective.type.PatternConstraintEffectiveImpl;
  25 import org.opendaylight.yangtools.yang.parser.stmt.rfc6020.effective.type.PatternEffectiveStatementImpl;
  26 import org.slf4j.Logger;
  27 import org.slf4j.LoggerFactory;
  28
  29 public class PatternStatementImpl extends AbstractDeclaredStatement<PatternConstraint> implements PatternStatement {
  30     private static final Logger LOG = LoggerFactory.getLogger(PatternStatementImpl.class);
  31     private static final Optional<String> OPTIONAL_EMPTY = Optional.of("");
  32
  33     protected PatternStatementImpl(StmtContext<PatternConstraint, PatternStatement, ?> context) {
  34         super(context);
  35     }
  36
  37     public static class Definition
  38             extends
  39             AbstractStatementSupport<PatternConstraint, PatternStatement, EffectiveStatement<PatternConstraint, PatternStatement>> {
  40
  41         public Definition() {
  42             super(Rfc6020Mapping.PATTERN);
  43         }
  44
  45         @Override
  46         public PatternConstraint parseArgumentValue(StmtContext<?, ?, ?> ctx, String value) {
  47             final String pattern = "^" + value + '$';
  48
  49             try {
  50                 Pattern.compile(pattern);
  51                 return new PatternConstraintEffectiveImpl(pattern, OPTIONAL_EMPTY, OPTIONAL_EMPTY);
  52             } catch (PatternSyntaxException e) {
  53                 LOG.debug("Pattern {} failed to compile", pattern, e);
  54                 return null;
  55             }
  56         }
  57
  58         @Override
  59         public PatternStatement createDeclared(StmtContext<PatternConstraint, PatternStatement, ?> ctx) {
  60             return new PatternStatementImpl(ctx);
  61         }
  62
  63         @Override
  64         public EffectiveStatement<PatternConstraint, PatternStatement> createEffective(
  65                 StmtContext<PatternConstraint, PatternStatement, EffectiveStatement<PatternConstraint, PatternStatement>> ctx) {
  66             return new PatternEffectiveStatementImpl(ctx);
  67         }
  68     }
  69
  70     @Override
  71     public ErrorAppTagStatement getErrorAppTagStatement() {
  72         return firstDeclared(ErrorAppTagStatement.class);
  73     }
  74
  75     @Override
  76     public ErrorMessageStatement getErrorMessageStatement() {
  77         return firstDeclared(ErrorMessageStatement.class);
  78     }
  79
  80     @Override
  81     public DescriptionStatement getDescription() {
  82         return firstDeclared(DescriptionStatement.class);
  83     }
  84
  85     @Override
  86     public ReferenceStatement getReference() {
  87         return firstDeclared(ReferenceStatement.class);
  88     }
  89
  90     @Override
  91     public PatternConstraint getValue() {
  92         return argument();
  93     }
  94
  95 }