171 lines
4.0 KiB
Java
171 lines
4.0 KiB
Java
/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.jasper.compiler;
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import java.io.PrintWriter;
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/**
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* This is what is used to generate servlets.
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*
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* @author Anil K. Vijendran
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* @author Kin-man Chung
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*/
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public class ServletWriter implements AutoCloseable {
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private static final int TAB_WIDTH = 2;
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private static final String SPACES = " ";
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/**
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* Current indent level.
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*/
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private int indent = 0;
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private int virtual_indent = 0;
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/**
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* The sink writer.
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*/
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private final PrintWriter writer;
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/**
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* Servlet line numbers start from 1.
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*/
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private int javaLine = 1;
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public ServletWriter(PrintWriter writer) {
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this.writer = writer;
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}
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@Override
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public void close() {
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writer.close();
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}
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// -------------------- Access informations --------------------
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public int getJavaLine() {
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return javaLine;
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}
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// -------------------- Formatting --------------------
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public void pushIndent() {
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virtual_indent += TAB_WIDTH;
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if (virtual_indent >= 0 && virtual_indent <= SPACES.length())
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indent = virtual_indent;
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}
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public void popIndent() {
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virtual_indent -= TAB_WIDTH;
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if (virtual_indent >= 0 && virtual_indent <= SPACES.length())
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indent = virtual_indent;
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}
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/**
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* Prints the given string followed by '\n'
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* @param s The string
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*/
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public void println(String s) {
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javaLine++;
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writer.println(s);
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}
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/**
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* Prints a '\n'
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*/
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public void println() {
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javaLine++;
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writer.println("");
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}
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/**
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* Prints the current indention
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*/
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public void printin() {
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writer.print(SPACES.substring(0, indent));
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}
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/**
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* Prints the current indention, followed by the given string
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* @param s The string
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*/
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public void printin(String s) {
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writer.print(SPACES.substring(0, indent));
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writer.print(s);
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}
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/**
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* Prints the current indention, and then the string, and a '\n'.
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* @param s The string
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*/
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public void printil(String s) {
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javaLine++;
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writer.print(SPACES.substring(0, indent));
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writer.println(s);
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}
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/**
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* Prints the given char.
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*
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* Use println() to print a '\n'.
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* @param c The char
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*/
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public void print(char c) {
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writer.print(c);
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}
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/**
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* Prints the given int.
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* @param i The int
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*/
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public void print(int i) {
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writer.print(i);
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}
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/**
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* Prints the given string.
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*
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* The string must not contain any '\n', otherwise the line count will be
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* off.
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* @param s The string
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*/
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public void print(String s) {
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writer.print(s);
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}
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/**
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* Prints the given string.
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*
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* If the string spans multiple lines, the line count will be adjusted
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* accordingly.
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* @param s The string
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*/
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public void printMultiLn(String s) {
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int index = 0;
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// look for hidden newlines inside strings
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while ((index=s.indexOf('\n',index)) > -1 ) {
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javaLine++;
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index++;
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}
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writer.print(s);
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}
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}
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