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Diffstat (limited to 'framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/filters/SuffixLines.java')
| -rw-r--r-- | framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/filters/SuffixLines.java | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/filters/SuffixLines.java b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/filters/SuffixLines.java new file mode 100644 index 00000000..23d9b534 --- /dev/null +++ b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/filters/SuffixLines.java @@ -0,0 +1,174 @@ +/* + * 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.tools.ant.filters; + +import java.io.IOException; +import java.io.Reader; + +import org.apache.tools.ant.types.Parameter; + +/** + * Attaches a suffix to every line. + * + * Example: + * <pre><suffixlines suffix="Foo"/></pre> + * + * Or: + * + * <pre><filterreader classname="org.apache.tools.ant.filters.SuffixLines"> + * <param name="suffix" value="Foo"/> + * </filterreader></pre> + * + * @since Ant 1.8.0 + */ +public final class SuffixLines + extends BaseParamFilterReader + implements ChainableReader { + /** Parameter name for the prefix. */ + private static final String SUFFIX_KEY = "suffix"; + + /** The suffix to be used. */ + private String suffix = null; + + /** Data that must be read from, if not null. */ + private String queuedData = null; + + /** + * Constructor for "dummy" instances. + * + * @see BaseFilterReader#BaseFilterReader() + */ + public SuffixLines() { + super(); + } + + /** + * Creates a new filtered reader. + * + * @param in A Reader object providing the underlying stream. + * Must not be <code>null</code>. + */ + public SuffixLines(final Reader in) { + super(in); + } + + /** + * Returns the next character in the filtered stream. One line is read + * from the original input, and the suffix added. The resulting + * line is then used until it ends, at which point the next original line + * is read, etc. + * + * @return the next character in the resulting stream, or -1 + * if the end of the resulting stream has been reached + * + * @exception IOException if the underlying stream throws an IOException + * during reading + */ + public int read() throws IOException { + if (!getInitialized()) { + initialize(); + setInitialized(true); + } + + int ch = -1; + + if (queuedData != null && queuedData.length() == 0) { + queuedData = null; + } + + if (queuedData != null) { + ch = queuedData.charAt(0); + queuedData = queuedData.substring(1); + if (queuedData.length() == 0) { + queuedData = null; + } + } else { + queuedData = readLine(); + if (queuedData == null) { + ch = -1; + } else { + if (suffix != null) { + String lf = ""; + if (queuedData.endsWith("\r\n")) { + lf = "\r\n"; + } else if (queuedData.endsWith("\n")) { + lf = "\n"; + } + queuedData = + queuedData.substring(0, + queuedData.length() - lf.length()) + + suffix + lf; + } + return read(); + } + } + return ch; + } + + /** + * Sets the suffix to add at the end of each input line. + * + * @param suffix The suffix to add at the end of each input line. + * May be <code>null</code>, in which case no suffix + * is added. + */ + public void setSuffix(final String suffix) { + this.suffix = suffix; + } + + /** + * Returns the suffix which will be added at the end of each input line. + * + * @return the suffix which will be added at the end of each input line + */ + private String getSuffix() { + return suffix; + } + + /** + * Creates a new SuffixLines filter using the passed in + * Reader for instantiation. + * + * @param rdr A Reader object providing the underlying stream. + * Must not be <code>null</code>. + * + * @return a new filter based on this configuration, but filtering + * the specified reader + */ + public Reader chain(final Reader rdr) { + SuffixLines newFilter = new SuffixLines(rdr); + newFilter.setSuffix(getSuffix()); + newFilter.setInitialized(true); + return newFilter; + } + + /** + * Initializes the suffix if it is available from the parameters. + */ + private void initialize() { + Parameter[] params = getParameters(); + if (params != null) { + for (int i = 0; i < params.length; i++) { + if (SUFFIX_KEY.equals(params[i].getName())) { + suffix = params[i].getValue(); + break; + } + } + } + } +} |