| // *************************************************************************************************************************** |
| // * 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.juneau.utils; |
| |
| import static org.apache.juneau.internal.StringUtils.*; |
| |
| import java.io.*; |
| import java.text.*; |
| |
| import org.apache.juneau.*; |
| import org.apache.juneau.http.*; |
| |
| /** |
| * An encapsulated MessageFormat-style string and arguments. |
| * |
| * <p> |
| * Useful for delayed serialization of arguments for logging. |
| * Message string will not be constructed until the <c>toString()</c> method is called. |
| */ |
| public class StringMessage implements CharSequence, Writable { |
| |
| private final String pattern; |
| private final Object[] args; |
| private String results; |
| |
| /** |
| * Constructor. |
| * |
| * @param pattern {@link MessageFormat}-style pattern. |
| * @param args Message arguments. |
| */ |
| public StringMessage(String pattern, Object...args) { |
| this.pattern = pattern; |
| this.args = args; |
| } |
| |
| @Override /* Writable */ |
| public Writer writeTo(Writer w) throws IOException { |
| w.write(toString()); |
| return w; |
| } |
| |
| @Override /* Writable */ |
| public MediaType getMediaType() { |
| return null; |
| } |
| |
| @Override /* CharSequence */ |
| public char charAt(int index) { |
| return toString().charAt(index); |
| } |
| |
| @Override /* CharSequence */ |
| public int length() { |
| return toString().length(); |
| } |
| |
| @Override /* CharSequence */ |
| public CharSequence subSequence(int start, int end) { |
| return toString().subSequence(start, end); |
| } |
| |
| @Override /* Object */ |
| public String toString() { |
| if (results == null) |
| results = format(pattern, args); |
| return results; |
| } |
| } |