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PrettyPrintingJsonGeneratorDecorator.java
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PrettyPrintingJsonGeneratorDecorator.java
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/*
* Copyright 2013-2023 the original author or authors.
*
* Licensed 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 under the License.
*/
package net.logstash.logback.decorate;
import ch.qos.logback.core.CoreConstants;
import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.core.util.DefaultPrettyPrinter;
/**
* Enables pretty printing on the {@link JsonGenerator}
*/
public class PrettyPrintingJsonGeneratorDecorator implements JsonGeneratorDecorator {
private DefaultPrettyPrinter prettyPrinter = new DefaultPrettyPrinter()
.withRootSeparator(CoreConstants.EMPTY_STRING);
@Override
public JsonGenerator decorate(JsonGenerator generator) {
return generator.setPrettyPrinter(prettyPrinter);
}
/**
* Sets the root separator used by the pretty printer.
*
* <p>Replaces occurrences of the string literal {@code [SPACE]} with a space character
* to work around the fact that logback trims values read from xml before calling the setter.
* Therefore, to set the root separator to a single space, you can specify
* {@code <rootSeparator>[SPACE]</rootSeparator>} in the xml configuration.</p>
*
* @param rootSeparator the new root separator
* @see DefaultPrettyPrinter#withRootSeparator(String)
*/
public void setRootSeparator(String rootSeparator) {
prettyPrinter = prettyPrinter.withRootSeparator(
rootSeparator == null ? null : rootSeparator.replace("[SPACE]", " "));
}
/**
* Sets whether spaces appear in object entries.
*
* @param spacesInObjectEntries whether spaces appear in object entries.
* @see DefaultPrettyPrinter#withSpacesInObjectEntries()
* @see DefaultPrettyPrinter#withoutSpacesInObjectEntries()
*/
public void setSpacesInObjectEntries(boolean spacesInObjectEntries) {
if (spacesInObjectEntries) {
prettyPrinter = prettyPrinter.withSpacesInObjectEntries();
} else {
prettyPrinter = prettyPrinter.withoutSpacesInObjectEntries();
}
}
}