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[yangtools.git] / data / yang-data-impl / src / main / java / org / opendaylight / yangtools / yang / data / impl / codec / CompiledPatternContext.java

diff --git a/data/yang-data-impl/src/main/java/org/opendaylight/yangtools/yang/data/impl/codec/CompiledPatternContext.java b/data/yang-data-impl/src/main/java/org/opendaylight/yangtools/yang/data/impl/codec/CompiledPatternContext.java
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+/*
+ * Copyright (c) 2015 Cisco Systems, Inc. and others.  All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+package org.opendaylight.yangtools.yang.data.impl.codec;
+
+import static java.util.Objects.requireNonNull;
+
+import java.util.Optional;
+import java.util.regex.Pattern;
+import org.opendaylight.yangtools.yang.common.RpcError.ErrorType;
+import org.opendaylight.yangtools.yang.data.api.codec.YangInvalidValueException;
+import org.opendaylight.yangtools.yang.model.api.type.ModifierKind;
+import org.opendaylight.yangtools.yang.model.api.type.PatternConstraint;
+
+final class CompiledPatternContext {
+    private final PatternConstraint constraint;
+    private final Pattern pattern;
+    private final boolean invert;
+
+    CompiledPatternContext(final PatternConstraint yangConstraint) {
+        this.constraint = requireNonNull(yangConstraint);
+        pattern = Pattern.compile(yangConstraint.getJavaPatternString());
+
+        final Optional<ModifierKind> optModifier = yangConstraint.getModifier();
+        if (optModifier.isPresent()) {
+            final ModifierKind modifier = optModifier.get();
+            switch (modifier) {
+                case INVERT_MATCH:
+                    invert = true;
+                    break;
+                default:
+                    throw new IllegalStateException("Unhandled modifier " + modifier);
+            }
+        } else {
+            invert = false;
+        }
+    }
+
+    void validate(final String str) {
+        if (pattern.matcher(str).matches() == invert) {
+            throw new YangInvalidValueException(ErrorType.PROTOCOL, constraint,
+                "Value '" + str + "' " + (invert ? "matches" : "does not match") + " regular expression '"
+                        + constraint.getRegularExpressionString() + "'");
+        }
+    }
+}