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.mdsal.binding.java.api.generator;
10 import com.google.common.collect.Range;
11 import java.util.ArrayList;
12 import java.util.Collection;
14 import org.eclipse.jdt.annotation.NonNull;
15 import org.eclipse.jdt.annotation.Nullable;
16 import org.opendaylight.mdsal.binding.model.api.Type;
17 import org.opendaylight.yangtools.yang.model.api.type.LengthConstraint;
18 import org.slf4j.Logger;
19 import org.slf4j.LoggerFactory;
21 final class LengthGenerator {
22 private static final Logger LOG = LoggerFactory.getLogger(LengthGenerator.class);
24 private LengthGenerator() {
25 throw new UnsupportedOperationException();
28 private static String lengthCheckerName(final String member) {
29 return "check" + member + "Length";
32 private static Collection<String> createExpressions(final LengthConstraint constraint) {
33 final Set<Range<Integer>> constraints = constraint.getAllowedRanges().asRanges();
34 final Collection<String> ret = new ArrayList<>(constraints.size());
36 for (Range<Integer> l : constraints) {
37 // We have to deal with restrictions being out of integer's range
38 final String expr = createExpression(l.lowerEndpoint().intValue(), l.upperEndpoint().intValue());
40 // This range is implicitly capped by String/byte[] length returns
41 LOG.debug("Constraint {} implied by int type value domain, skipping", l);
50 private static @Nullable String createExpression(final int min, final int max) {
52 return min < Integer.MAX_VALUE ? "length == " + min : null;
55 final StringBuilder sb = new StringBuilder("length >= ").append(min);
56 if (max < Integer.MAX_VALUE) {
57 sb.append(" && length <= ").append(max);
62 return max < Integer.MAX_VALUE ? "length <= " + max : null;
65 private static String createLengthString(final LengthConstraint constraint) {
66 return new ArrayList<>(constraint.getAllowedRanges().asRanges()).toString();
69 private static String generateArrayLengthChecker(final String member, final LengthConstraint constraint,
70 final JavaFileTemplate template) {
71 final StringBuilder sb = new StringBuilder();
72 final Collection<String> expressions = createExpressions(constraint);
74 sb.append("private static void ").append(lengthCheckerName(member)).append("(final byte[] value) {\n");
76 if (!expressions.isEmpty()) {
77 sb.append(" final int length = value.length;\n");
79 for (String exp : expressions) {
80 sb.append(" if (").append(exp).append(") {\n");
81 sb.append(" return;\n");
85 sb.append(" ").append(template.importedName(JavaFileTemplate.CODEHELPERS))
86 .append(".throwInvalidLength(\"").append(createLengthString(constraint)).append("\", value);\n");
89 return sb.append("}\n").toString();
92 private static String generateStringLengthChecker(final String member, final LengthConstraint constraint,
93 final JavaFileTemplate template) {
94 final StringBuilder sb = new StringBuilder();
95 final Collection<String> expressions = createExpressions(constraint);
97 sb.append("private static void ").append(lengthCheckerName(member)).append("(final String value) {\n");
99 if (!expressions.isEmpty()) {
100 sb.append(" final int length = value.length();\n");
102 for (String exp : expressions) {
103 sb.append(" if (").append(exp).append(") {\n");
104 sb.append(" return;\n");
108 sb.append(" ").append(template.importedName(JavaFileTemplate.CODEHELPERS))
109 .append(".throwInvalidLength(\"").append(createLengthString(constraint)).append("\", value);\n");
112 return sb.append("}\n").toString();
115 static String generateLengthChecker(final String member, final @NonNull Type type,
116 final LengthConstraint constraint, final JavaFileTemplate template) {
117 return TypeUtils.getBaseYangType(type).getName().indexOf('[') != -1
118 ? generateArrayLengthChecker(member, constraint, template)
119 : generateStringLengthChecker(member, constraint, template);
122 static String generateLengthCheckerCall(final @Nullable String member, final @NonNull String valueReference) {
123 return lengthCheckerName(member) + '(' + valueReference + ");\n";