org.neo4j.configuration.SettingConstraints Maven / Gradle / Ivy
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Code responsible for parsing the Neo4j configuration.
/*
* Copyright (c) "Neo4j"
* Neo4j Sweden AB [https://neo4j.com]
*
* This file is part of Neo4j.
*
* Neo4j is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see except(String... forbiddenValues) {
return new SettingConstraint<>() {
@Override
public void validate(String value, Configuration config) {
if (StringUtils.isNotBlank(value)) {
if (ArrayUtils.contains(forbiddenValues, value)) {
throw new IllegalArgumentException(format("not allowed value is: %s", value));
}
}
}
@Override
public String getDescription() {
if (forbiddenValues.length > 1) {
return format("is none of %s", Arrays.toString(forbiddenValues));
} else if (forbiddenValues.length == 1) {
return format("is not `%s`", forbiddenValues[0]);
}
return "";
}
};
}
public static SettingConstraint matches(String regex, String description) {
return new SettingConstraint<>() {
private final String descMsg = StringUtils.isEmpty(description) ? "" : format(" (%s)", description);
private final Pattern pattern = Pattern.compile(regex);
@Override
public void validate(String value, Configuration config) {
if (!pattern.matcher(value).matches()) {
throw new IllegalArgumentException(
format("value does not match expression: `%s`%s", regex, descMsg));
}
}
@Override
public String getDescription() {
return format("matches the pattern `%s`%s", regex, descMsg);
}
};
}
public static SettingConstraint matches(String regex) {
return matches(regex, null);
}
public static > SettingConstraint min(final T minValue) {
return new SettingConstraint<>() {
@Override
public void validate(T value, Configuration config) {
if (value == null) {
throw new IllegalArgumentException("can not be null");
}
if (minValue.compareTo(value) > 0) {
throw new IllegalArgumentException(format("minimum allowed value is %s", valueToString(minValue)));
}
}
@Override
public String getDescription() {
return format("is minimum `%s`", valueToString(minValue));
}
};
}
public static > SettingConstraint max(final T maxValue) {
return new SettingConstraint<>() {
@Override
public void validate(T value, Configuration config) {
if (value == null) {
throw new IllegalArgumentException("can not be null");
}
if (maxValue.compareTo(value) < 0) {
throw new IllegalArgumentException(format("maximum allowed value is %s", valueToString(maxValue)));
}
}
@Override
public String getDescription() {
return format("is maximum `%s`", valueToString(maxValue));
}
};
}
public static > SettingConstraint range(final T minValue, final T maxValue) {
return new SettingConstraint<>() {
private final SettingConstraint max = max(maxValue);
private final SettingConstraint min = min(minValue);
@Override
public void validate(T value, Configuration config) {
min.validate(value, config);
max.validate(value, config);
}
@Override
public String getDescription() {
return format("is in the range `%s` to `%s`", valueToString(minValue), valueToString(maxValue));
}
};
}
public static SettingConstraint is(final T expected) {
return new SettingConstraint<>() {
@Override
public void validate(T value, Configuration config) {
if (!Objects.equals(value, expected)) {
throw new IllegalArgumentException(format("is not `%s`", valueToString(expected)));
}
}
@Override
public String getDescription() {
return format("is `%s`", valueToString(expected));
}
};
}
@SafeVarargs
public static SettingConstraint any(SettingConstraint first, SettingConstraint... rest) {
return new SettingConstraint<>() {
private final SettingConstraint[] constraints = ArrayUtil.concat(first, rest);
@Override
public void validate(T value, Configuration config) {
for (SettingConstraint constraint : constraints) {
try {
constraint.validate(value, config);
return; // Only one constraint needs to pass for this to pass.
} catch (RuntimeException e) {
// Ignore
}
}
throw new IllegalArgumentException(format("does not fulfill any of %s", getDescription()));
}
@Override
public String getDescription() {
return stream(constraints)
.map(SettingConstraint::getDescription)
.collect(joining(" or "));
}
@Override
void setParser(SettingValueParser parser) {
super.setParser(parser);
stream(constraints).forEach(constraint -> constraint.setParser(parser));
}
};
}
public static final SettingConstraint POWER_OF_2 = new SettingConstraint<>() {
@Override
public void validate(Long value, Configuration config) {
if (value != null && !Numbers.isPowerOfTwo(value)) {
throw new IllegalArgumentException("only power of 2 values allowed");
}
}
@Override
public String getDescription() {
return "is power of 2";
}
};
public static SettingConstraint> size(final int size) {
return new SettingConstraint<>() {
@Override
public void validate(List value, Configuration config) {
if (value == null) {
throw new IllegalArgumentException("can not be null");
}
if (value.size() != size) {
throw new IllegalArgumentException(format("needs to be of size %s", size));
}
}
@Override
public String getDescription() {
return format("is of size `%s`", size);
}
};
}
public static SettingConstraint> noDuplicates() {
return new SettingConstraint<>() {
@Override
public void validate(List value, Configuration config) {
if (Set.copyOf(value).size() != value.size()) {
throw new IllegalArgumentException(
format("items should not have duplicates: %s", valueToString(value)));
}
}
@Override
public String getDescription() {
return "contains no duplicate items";
}
};
}
public static SettingConstraint> singleControlledValueOrFreeList(final String controlledvalue) {
return new SettingConstraint<>() {
@Override
public void validate(List list, Configuration config) {
if (list != null && list.size() > 1 && list.contains(controlledvalue)) {
throw new IllegalArgumentException(format(
"The list's length can not be greater than 1 if it contains the value %s.",
controlledvalue));
}
}
@Override
public String getDescription() {
return format("One single controlled value (`%s`) or free list.", controlledvalue);
}
};
}
public static final SettingConstraint HOSTNAME_ONLY = new SettingConstraint<>() {
@Override
public void validate(SocketAddress value, Configuration config) {
if (value == null) {
throw new IllegalArgumentException("can not be null");
}
if (value.getPort() >= 0) {
throw new IllegalArgumentException("can not have a port");
}
if (StringUtils.isBlank(value.getHostname())) {
throw new IllegalArgumentException("needs not a hostname");
}
}
@Override
public String getDescription() {
return "has no specified port";
}
};
public static final SettingConstraint NO_ALL_INTERFACES_ADDRESS = new SettingConstraint<>() {
@Override
public void validate(SocketAddress value, Configuration config) {
if (value != null && value.getHostname() != null) {
if (value.getHostname().matches("^0+\\.0+\\.0+\\.0+$")) {
throw new IllegalArgumentException("advertised address cannot be '0.0.0.0'");
}
if ("::".equals(value.getHostname())) {
throw new IllegalArgumentException("advertised address cannot be '::'");
}
}
}
@Override
public String getDescription() {
return "is an accessible address";
}
};
public static final SettingConstraint ABSOLUTE_PATH = new SettingConstraint<>() {
@Override
public void validate(Path value, Configuration config) {
if (!value.isAbsolute()) {
throw new IllegalArgumentException(format("`%s` is not an absolute path.", valueToString(value)));
}
}
@Override
public String getDescription() {
return "is absolute";
}
};
public static SettingConstraint dependency(
SettingConstraint ifConstraint,
SettingConstraint elseConstraint,
Setting dependency,
SettingConstraint condition) {
return new SettingConstraint<>() {
@Override
public void validate(T value, Configuration config) {
U depValue = config.get(dependency);
try {
condition.validate(depValue, config);
} catch (IllegalArgumentException e) {
elseConstraint.validate(value, config);
return;
}
ifConstraint.validate(value, config);
}
@Override
public String getDescription() {
return format(
"depends on %s. If %s %s then it %s otherwise it %s",
dependency.name(),
dependency.name(),
condition.getDescription(),
ifConstraint.getDescription(),
elseConstraint.getDescription());
}
@Override
void setParser(SettingValueParser parser) {
super.setParser(parser);
ifConstraint.setParser(parser);
elseConstraint.setParser(parser);
condition.setParser(((SettingImpl) dependency).parser());
}
};
}
public static SettingConstraint unconstrained() {
return new SettingConstraint<>() {
@Override
public void validate(T value, Configuration config) {}
@Override
public String getDescription() {
return "is unconstrained";
}
};
}
public static SettingConstraint greaterThanOrEqual(Setting other) {
return new SettingConstraint<>() {
@Override
public void validate(Integer value, Configuration config) {
var otherValue = config.get(other);
if (value == null) {
throw new IllegalArgumentException("can not be null");
}
if (otherValue == null) {
throw new IllegalArgumentException(other.name() + " can not be null");
}
if (value < otherValue) {
throw new IllegalArgumentException(getDescription()
+ format("was %d, which is not more than or equal to %d", value, otherValue));
}
}
@Override
public String getDescription() {
return format("must be set greater than or equal to value of '%s'", other.name());
}
};
}
public static SettingConstraint lessThanOrEqual(
Function converter,
Setting other,
LongFunction otherModifier,
String modifierDescription) {
return new SettingConstraint<>() {
@Override
public void validate(T value, Configuration config) {
var otherValue = config.get(other);
if (value == null) {
throw new IllegalArgumentException("can not be null");
}
if (otherValue == null) {
throw new IllegalArgumentException(other.name() + " can not be null");
}
var thisAsLong = converter.apply(value);
var otherAsLong = converter.apply(otherValue);
if (thisAsLong == null) {
throw new IllegalStateException("Result of " + converter + " on " + value + " can not be null");
}
if (otherAsLong == null) {
throw new IllegalStateException(
"Result of " + converter + " on " + other.name() + " (" + otherValue + ") can not be null");
}
var modifiedOther = otherModifier.apply(otherAsLong);
if (modifiedOther == null) {
throw new IllegalStateException(
"Result of " + otherModifier + " on " + other.name() + " (" + otherAsLong + ") was null");
}
if (thisAsLong > modifiedOther) {
throw new IllegalArgumentException(getDescription()
+ format(
". was %d, which is not less than or equal to %d from %s",
thisAsLong, modifiedOther, other.name()));
}
}
@Override
public String getDescription() {
return format("must be set less than or equal to value of '%s' %s", other.name(), modifierDescription);
}
};
}
public static SettingConstraint lessThanOrEqual(Function converter, Setting other) {
return lessThanOrEqual(converter, other, s -> s, "");
}
public static SettingConstraint lessThanOrEqual(Setting other) {
return lessThanOrEqual(Long::valueOf, other);
}
public static SettingConstraint lessThanOrEqualLong(Setting other) {
return lessThanOrEqual(Long::valueOf, other);
}
}
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