2 * Copyright (c) 2015 Cisco Systems, Inc. and others. All rights reserved.
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
8 package org.opendaylight.yangtools.yang.data.impl.codec;
10 import static com.google.common.base.Preconditions.checkArgument;
12 import com.google.common.annotations.Beta;
13 import com.google.common.base.CharMatcher;
14 import com.google.common.collect.RangeSet;
15 import java.util.Optional;
16 import java.util.regex.Pattern;
17 import org.opendaylight.yangtools.yang.model.api.TypeDefinition;
18 import org.opendaylight.yangtools.yang.model.api.type.Int16TypeDefinition;
19 import org.opendaylight.yangtools.yang.model.api.type.Int32TypeDefinition;
20 import org.opendaylight.yangtools.yang.model.api.type.Int64TypeDefinition;
21 import org.opendaylight.yangtools.yang.model.api.type.Int8TypeDefinition;
22 import org.opendaylight.yangtools.yang.model.api.type.IntegerTypeDefinition;
23 import org.opendaylight.yangtools.yang.model.api.type.RangeConstraint;
24 import org.opendaylight.yangtools.yang.model.api.type.RangeRestrictedTypeDefinition;
25 import org.opendaylight.yangtools.yang.model.api.type.Uint16TypeDefinition;
26 import org.opendaylight.yangtools.yang.model.api.type.Uint32TypeDefinition;
27 import org.opendaylight.yangtools.yang.model.api.type.Uint64TypeDefinition;
28 import org.opendaylight.yangtools.yang.model.api.type.Uint8TypeDefinition;
29 import org.opendaylight.yangtools.yang.model.api.type.UnsignedIntegerTypeDefinition;
32 * Do not use this class outside of yangtools, its presence does not fall into the API stability contract.
35 public abstract class AbstractIntegerStringCodec<N extends Number & Comparable<N>, T extends TypeDefinition<T>>
36 extends TypeDefinitionAwareCodec<N, T> {
38 private static final Pattern INT_PATTERN = Pattern.compile("[+-]?[1-9][0-9]*$");
39 private static final Pattern HEX_PATTERN = Pattern.compile("[+-]?0[xX][0-9a-fA-F]+");
40 private static final Pattern OCT_PATTERN = Pattern.compile("[+-]?0[1-7][0-7]*$");
42 // For up to two characters, this is very fast
43 private static final CharMatcher X_MATCHER = CharMatcher.anyOf("xX");
45 private static final String INCORRECT_LEXICAL_REPRESENTATION =
46 "Incorrect lexical representation of integer value: %s."
47 + "\nAn integer value can be defined as: "
48 + "\n - a decimal number,"
49 + "\n - a hexadecimal number (prefix 0x)," + "%n - an octal number (prefix 0)."
50 + "\nSigned values are allowed. Spaces between digits are NOT allowed.";
52 private final RangeSet<N> rangeConstraints;
54 AbstractIntegerStringCodec(final Optional<T> typeDefinition, final Optional<RangeConstraint<N>> constraint,
55 final Class<N> outputClass) {
56 super(typeDefinition, outputClass);
57 rangeConstraints = constraint.map(RangeConstraint::getAllowedRanges).orElse(null);
60 public static AbstractIntegerStringCodec<?, ? extends IntegerTypeDefinition<?, ?>> from(
61 final IntegerTypeDefinition<?, ?> type) {
62 if (type instanceof Int8TypeDefinition) {
63 return new Int8StringCodec(Optional.of((Int8TypeDefinition) type));
64 } else if (type instanceof Int16TypeDefinition) {
65 return new Int16StringCodec(Optional.of((Int16TypeDefinition) type));
66 } else if (type instanceof Int32TypeDefinition) {
67 return new Int32StringCodec(Optional.of((Int32TypeDefinition) type));
68 } else if (type instanceof Int64TypeDefinition) {
69 return new Int64StringCodec(Optional.of((Int64TypeDefinition) type));
71 throw new IllegalArgumentException("Unsupported type: " + type);
75 public static AbstractIntegerStringCodec<?, ? extends UnsignedIntegerTypeDefinition<?, ?>> from(
76 final UnsignedIntegerTypeDefinition<?, ?> type) {
77 if (type instanceof Uint8TypeDefinition) {
78 return new Uint8StringCodec(Optional.of((Uint8TypeDefinition) type));
79 } else if (type instanceof Uint16TypeDefinition) {
80 return new Uint16StringCodec(Optional.of((Uint16TypeDefinition) type));
81 } else if (type instanceof Uint32TypeDefinition) {
82 return new Uint32StringCodec(Optional.of((Uint32TypeDefinition) type));
83 } else if (type instanceof Uint64TypeDefinition) {
84 return new Uint64StringCodec(Optional.of((Uint64TypeDefinition) type));
86 throw new IllegalArgumentException("Unsupported type: " + type);
91 public final N deserialize(final String stringRepresentation) {
92 final int base = provideBase(stringRepresentation);
95 deserialized = deserialize(normalizeHexadecimal(stringRepresentation),base);
97 deserialized = deserialize(stringRepresentation,base);
99 validate(deserialized);
104 * Deserializes value from supplied string representation is supplied radix. See
105 * {@link Integer#parseInt(String, int)} for in-depth description about string and radix relationship.
107 * @param stringRepresentation String representation
108 * @param radix numeric base.
109 * @return Deserialized value.
111 abstract N deserialize(String stringRepresentation, int radix);
113 private void validate(final N value) {
114 if (rangeConstraints != null) {
115 checkArgument(rangeConstraints.contains(value), "Value '%s' is not in required ranges %s",
116 value, rangeConstraints);
120 protected static <N extends Number & Comparable<N>> Optional<RangeConstraint<N>> extractRange(
121 final RangeRestrictedTypeDefinition<?, N> type) {
122 return type == null ? Optional.empty() : type.getRangeConstraint();
125 private static int provideBase(final String integer) {
126 checkArgument(integer != null, "String representing integer number cannot be NULL");
128 if (integer.length() == 1 && integer.charAt(0) == '0') {
130 } else if (INT_PATTERN.matcher(integer).matches()) {
132 } else if (HEX_PATTERN.matcher(integer).matches()) {
134 } else if (OCT_PATTERN.matcher(integer).matches()) {
137 throw new NumberFormatException(String.format(INCORRECT_LEXICAL_REPRESENTATION, integer));
141 private static String normalizeHexadecimal(final String hexInt) {
142 checkArgument(hexInt != null, "String representing integer number in Hexadecimal format cannot be NULL!");
143 return X_MATCHER.removeFrom(hexInt);