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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
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package com.signalfx.shaded.apache.commons.io.serialization;

import java.io.ObjectStreamClass;
import java.util.ArrayList;
import java.util.List;
import java.util.function.Predicate;
import java.util.regex.Pattern;
import java.util.stream.Stream;

/**
 * A predicate (boolean-valued function) of one argument to accept and reject classes.
 * 

* The reject list takes precedence over the accept list. *

* * @since 2.18.0 */ public class ObjectStreamClassPredicate implements Predicate { // This is not a Set for now to avoid ClassNameMatchers requiring proper implementations of hashCode() and equals(). private final List acceptMatchers = new ArrayList<>(); // This is not a Set for now to avoid ClassNameMatchers requiring proper implementations of hashCode() and equals(). private final List rejectMatchers = new ArrayList<>(); /** * Constructs a new instance. */ public ObjectStreamClassPredicate() { // empty } /** * Accepts the specified classes for deserialization, unless they are otherwise rejected. *

* The reject list takes precedence over the accept list. *

* * @param classes Classes to accept * @return this object */ public ObjectStreamClassPredicate accept(final Class... classes) { Stream.of(classes).map(c -> new FullClassNameMatcher(c.getName())).forEach(acceptMatchers::add); return this; } /** * Accepts class names where the supplied ClassNameMatcher matches for deserialization, unless they are otherwise rejected. *

* The reject list takes precedence over the accept list. *

* * @param matcher a class name matcher to accept objects. * @return this instance. */ public ObjectStreamClassPredicate accept(final ClassNameMatcher matcher) { acceptMatchers.add(matcher); return this; } /** * Accepts class names that match the supplied pattern for deserialization, unless they are otherwise rejected. *

* The reject list takes precedence over the accept list. *

* * @param pattern a Pattern for compiled regular expression. * @return this instance. */ public ObjectStreamClassPredicate accept(final Pattern pattern) { acceptMatchers.add(new RegexpClassNameMatcher(pattern)); return this; } /** * Accepts the wildcard specified classes for deserialization, unless they are otherwise rejected. *

* The reject list takes precedence over the accept list. *

* * @param patterns Wildcard file name patterns as defined by {@link com.signalfx.shaded.apache.commons.io.FilenameUtils#wildcardMatch(String, String) * FilenameUtils.wildcardMatch} * @return this instance. */ public ObjectStreamClassPredicate accept(final String... patterns) { Stream.of(patterns).map(WildcardClassNameMatcher::new).forEach(acceptMatchers::add); return this; } /** * Rejects the specified classes for deserialization, even if they are otherwise accepted. *

* The reject list takes precedence over the accept list. *

* * @param classes Classes to reject * @return this instance. */ public ObjectStreamClassPredicate reject(final Class... classes) { Stream.of(classes).map(c -> new FullClassNameMatcher(c.getName())).forEach(rejectMatchers::add); return this; } /** * Rejects class names where the supplied ClassNameMatcher matches for deserialization, even if they are otherwise accepted. *

* The reject list takes precedence over the accept list. *

* * @param m the matcher to use * @return this instance. */ public ObjectStreamClassPredicate reject(final ClassNameMatcher m) { rejectMatchers.add(m); return this; } /** * Rejects class names that match the supplied pattern for deserialization, even if they are otherwise accepted. *

* The reject list takes precedence over the accept list. *

* * @param pattern standard Java regexp * @return this instance. */ public ObjectStreamClassPredicate reject(final Pattern pattern) { rejectMatchers.add(new RegexpClassNameMatcher(pattern)); return this; } /** * Rejects the wildcard specified classes for deserialization, even if they are otherwise accepted. *

* The reject list takes precedence over the accept list. *

* * @param patterns Wildcard file name patterns as defined by {@link com.signalfx.shaded.apache.commons.io.FilenameUtils#wildcardMatch(String, String) * FilenameUtils.wildcardMatch} * @return this instance. */ public ObjectStreamClassPredicate reject(final String... patterns) { Stream.of(patterns).map(WildcardClassNameMatcher::new).forEach(rejectMatchers::add); return this; } /** * Tests that the ObjectStreamClass conforms to requirements. *

* The reject list takes precedence over the accept list. *

* * @param objectStreamClass The ObjectStreamClass to test. * @return true if the input is accepted, false if rejected, false if neither. */ @Override public boolean test(final ObjectStreamClass objectStreamClass) { return test(objectStreamClass.getName()); } /** * Tests that the class name conforms to requirements. *

* The reject list takes precedence over the accept list. *

* * @param name The class name to test. * @return true if the input is accepted, false if rejected, false if neither. */ public boolean test(final String name) { // The reject list takes precedence over the accept list. for (final ClassNameMatcher m : rejectMatchers) { if (m.matches(name)) { return false; } } for (final ClassNameMatcher m : acceptMatchers) { if (m.matches(name)) { return true; } } return false; } }




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