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Posted to dev@ant.apache.org by um...@apache.org on 2002/03/01 01:56:33 UTC
cvs commit: jakarta-ant/proposal/sandbox/filterreaders/src/main/org/apache/tools/ant/types FilterChain.java
umagesh 02/02/28 16:56:33
Modified: proposal/sandbox/filterreaders/src/main/org/apache/tools/ant/types
FilterChain.java
Added: proposal/sandbox/filterreaders/src/main/org/apache/tools/ant/filters
LineContainsRegExp.java
Log:
New filter reader that gets those lines that match a regular expression pattern.
Requested by: Adam Murdoch
Revision Changes Path
1.1 jakarta-ant/proposal/sandbox/filterreaders/src/main/org/apache/tools/ant/filters/LineContainsRegExp.java
Index: LineContainsRegExp.java
===================================================================
/*
* The Apache Software License, Version 1.1
*
* Copyright (c) 2002 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The Jakarta Project", "Ant", and "Apache Software
* Foundation" must not be used to endorse or promote products derived
* from this software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache"
* nor may "Apache" appear in their names without prior written
* permission of the Apache Group.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
package org.apache.tools.ant.filters;
import java.io.IOException;
import java.io.Reader;
import java.util.Vector;
import org.apache.tools.ant.types.Parameter;
import org.apache.tools.ant.types.RegularExpression;
import org.apache.tools.ant.util.regexp.Regexp;
/**
* Filter Reader to fetch only those lines that contain user specified
* regular expression matching strings.
*
* Example:
* =======
*
* <linecontainsregexp>
* <regexp pattern="foo*">
* </linecontainsregexp>
*
* Or:
*
* <filterreader classname="org.apache.tools.ant.filters.LineContainsRegExp">
* <param type="regexp" value="foo*"/>
* </filterreader>
*
* This will fetch all those lines that contain the pattern foo
*
* @author <a href="mailto:umagesh@apache.org">Magesh Umasankar</a>
*/
public final class LineContainsRegExp
extends BaseParamFilterReader
implements ChainableReader
{
/** contains key */
private static final String REGEXP_KEY = "regexp";
/** Vector that holds the strings that input lines must contain. */
private Vector regexps = new Vector();
/** Currently read in line. */
private String line = null;
/**
* This constructor is a dummy constructor and is
* not meant to be used by any class other than Ant's
* introspection mechanism. This will close the filter
* that is created making it useless for further operations.
*/
public LineContainsRegExp() {
super();
}
/**
* Create a new filtered reader.
*
* @param in a Reader object providing the underlying stream.
*/
public LineContainsRegExp(final Reader in) {
super(in);
}
/**
* Choose only those lines that contains
* user defined values.
*/
public final int read() throws IOException {
if (!getInitialized()) {
initialize();
setInitialized(true);
}
int ch = -1;
if (line != null) {
ch = line.charAt(0);
if (line.length() == 1) {
line = null;
} else {
line = line.substring(1);
}
} else {
line = readLine();
if (line == null) {
ch = -1;
} else {
final int regexpsSize = regexps.size();
for (int i = 0; i < regexpsSize; i++) {
RegularExpression regexp = (RegularExpression)
regexps.elementAt(i);
Regexp re = regexp.getRegexp(getProject());
boolean matches = re.matches(line);
if (!matches) {
line = null;
break;
}
}
return read();
}
}
return ch;
}
/**
* Add a contains element.
*/
public final void addConfiguredRegexp(final RegularExpression regExp) {
this.regexps.addElement(regExp);
}
/**
* Set regexps vector.
*/
private void setRegexps(final Vector regexps) {
this.regexps = regexps;
}
/**
* Get regexps vector.
*/
private final Vector getRegexps() {
return regexps;
}
/**
* Create a new LineContainsRegExp using the passed in
* Reader for instantiation.
*/
public final Reader chain(final Reader rdr) {
LineContainsRegExp newFilter = new LineContainsRegExp(rdr);
newFilter.setRegexps(getRegexps());
newFilter.setInitialized(true);
return newFilter;
}
/**
* Parse params to add user defined contains strings.
*/
private final void initialize() {
Parameter[] params = getParameters();
if (params != null) {
for (int i = 0; i < params.length; i++) {
if (REGEXP_KEY.equals(params[i].getType())) {
String pattern = params[i].getValue();
RegularExpression regexp = new RegularExpression();
regexp.setPattern(pattern);
regexps.addElement(regexp);
}
}
}
}
}
1.3 +6 -0 jakarta-ant/proposal/sandbox/filterreaders/src/main/org/apache/tools/ant/types/FilterChain.java
Index: FilterChain.java
===================================================================
RCS file: /home/cvs/jakarta-ant/proposal/sandbox/filterreaders/src/main/org/apache/tools/ant/types/FilterChain.java,v
retrieving revision 1.2
retrieving revision 1.3
diff -u -r1.2 -r1.3
--- FilterChain.java 28 Feb 2002 21:59:04 -0000 1.2
+++ FilterChain.java 1 Mar 2002 00:56:33 -0000 1.3
@@ -58,6 +58,7 @@
import org.apache.tools.ant.filters.ExpandProperties;
import org.apache.tools.ant.filters.HeadFilter;
import org.apache.tools.ant.filters.LineContains;
+import org.apache.tools.ant.filters.LineContainsRegExp;
import org.apache.tools.ant.filters.PrefixLines;
import org.apache.tools.ant.filters.ReplaceTokens;
import org.apache.tools.ant.filters.StripJavaComments;
@@ -93,6 +94,11 @@
public final void addLineContains(final LineContains lineContains) {
filterReaders.addElement(lineContains);
+ }
+
+ public final void addLineContainsRegExp(final LineContainsRegExp
+ lineContainsRegExp) {
+ filterReaders.addElement(lineContainsRegExp);
}
public final void addPrefixLines(final PrefixLines prefixLines) {
--
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