| /* |
| * 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 under the license. |
| */ |
| package org.apache.logging.log4j.core.pattern; |
| |
| import java.util.List; |
| |
| import org.apache.logging.log4j.core.LogEvent; |
| import org.apache.logging.log4j.util.PerformanceSensitive; |
| |
| /** |
| * Equals pattern converter. |
| */ |
| @PerformanceSensitive("allocation") |
| public abstract class EqualsBaseReplacementConverter extends LogEventPatternConverter { |
| private final List<PatternFormatter> formatters; |
| private final List<PatternFormatter> substitutionFormatters; |
| private final String substitution; |
| private final String testString; |
| |
| /** |
| * Construct the converter. |
| * |
| * @param name converter name |
| * @param style converter style |
| * @param formatters The PatternFormatters to generate the text to manipulate. |
| * @param testString The test string. |
| * @param substitution The substitution string. |
| * @param parser The PatternParser. |
| */ |
| protected EqualsBaseReplacementConverter(final String name, final String style, |
| final List<PatternFormatter> formatters, final String testString, |
| final String substitution, final PatternParser parser) { |
| super(name, style); |
| this.testString = testString; |
| this.substitution = substitution; |
| this.formatters = formatters; |
| |
| // check if substitution needs to be parsed |
| substitutionFormatters = substitution.contains("%") ? parser.parse(substitution) : null; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public void format(final LogEvent event, final StringBuilder toAppendTo) { |
| final int initialSize = toAppendTo.length(); |
| for (int i = 0; i < formatters.size(); i++) { |
| final PatternFormatter formatter = formatters.get(i); |
| formatter.format(event, toAppendTo); |
| } |
| if (equals(testString, toAppendTo, initialSize, toAppendTo.length() - initialSize)) { |
| toAppendTo.setLength(initialSize); |
| parseSubstitution(event, toAppendTo); |
| } |
| } |
| |
| /** |
| * Returns true if the specified String equals the specified section of the specified StringBuilder. |
| * |
| * @param str the String to compare |
| * @param buff the StringBuilder to compare a section of |
| * @param from start index in the StringBuilder |
| * @param len length of the section in the StringBuilder |
| * @return true if equal, false otherwise |
| */ |
| protected abstract boolean equals(String str, StringBuilder buff, int from, int len); |
| |
| /** |
| * Adds the parsed substitution text to the specified buffer. |
| * |
| * @param event the current log event |
| * @param substitutionBuffer the StringBuilder to append the parsed substitution text to |
| */ |
| void parseSubstitution(final LogEvent event, final StringBuilder substitutionBuffer) { |
| if (substitutionFormatters != null) { |
| for (int i = 0; i < substitutionFormatters.size(); i++) { |
| final PatternFormatter formatter = substitutionFormatters.get(i); |
| formatter.format(event, substitutionBuffer); |
| } |
| } else { |
| substitutionBuffer.append(substitution); |
| } |
| } |
| } |