/*
* 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.types;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.util.Enumeration;
import java.util.StringTokenizer;
import java.util.Vector;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.Project;
/**
* Named collection of include/exclude tags.
*
* <p>Moved out of MatchingTask to make it a standalone object that
* could be referenced (by scripts for example).
*
*/
public class PatternSet extends DataType implements Cloneable {
private Vector includeList = new Vector();
private Vector excludeList = new Vector();
private Vector includesFileList = new Vector();
private Vector excludesFileList = new Vector();
/**
* inner class to hold a name on list. "If" and "Unless" attributes
* may be used to invalidate the entry based on the existence of a
* property (typically set thru the use of the Available task).
*/
public class NameEntry {
private String name;
private String ifCond;
private String unlessCond;
/**
* Sets the name pattern.
*
* @param name The pattern string.
*/
public void setName(String name) {
this.name = name;
}
/**
* Sets the if attribute. This attribute and the "unless"
* attribute are used to validate the name, based in the
* existence of the property.
*
* @param cond A property name. If this property is not
* present, the name is invalid.
*/
public void setIf(String cond) {
ifCond = cond;
}
/**
* Sets the unless attribute. This attribute and the "if"
* attribute are used to validate the name, based in the
* existence of the property.
*
* @param cond A property name. If this property is
* present, the name is invalid.
*/
public void setUnless(String cond) {
unlessCond = cond;
}
/**
* @return the name attribute.
*/
public String getName() {
return name;
}
/**
* This validates the name - checks the if and unless
* properties.
*
* @param p the current project, used to check the presence or
* absence of a property.
* @return the name attribute or null if the "if" or "unless"
* properties are not/are set.
*/
public String evalName(Project p) {
return valid(p) ? name : null;
}
private boolean valid(Project p) {
if (ifCond != null && p.getProperty(ifCond) == null) {
return false;
} else if (unlessCond != null && p.getProperty(unlessCond) != null) {
return false;
}
return true;
}
/**
* @return a printable form of this object.
*/
public String toString() {
StringBuffer buf = new StringBuffer();
if (name == null) {
buf.append("noname");
} else {
buf.append(name);
}
if ((ifCond != null) || (unlessCond != null)) {
buf.append(":");
String connector = "";
if (ifCond != null) {
buf.append("if->");
buf.append(ifCond);
connector = ";";
}
if (unlessCond != null) {
buf.append(connector);
buf.append("unless->");
buf.append(unlessCond);
}
}
return buf.toString();
}
}
/**
* Creates a new <code>PatternSet</code> instance.
*/
public PatternSet() {
super();
}
/**
* Makes this instance in effect a reference to another PatternSet
* instance.
*
* <p>You must not set another attribute or nest elements inside
* this element if you make it a reference.</p>
* @param r the reference to another patternset.
* @throws BuildException on error.
*/
public void setRefid(Reference r) throws BuildException {
if (!includeList.isEmpty() || !excludeList.isEmpty()) {
throw tooManyAttributes();
}
super.setRefid(r);
}
/**
* This is a patternset nested element.
*
* @param p a configured patternset nested element.
*/
public void addConfiguredPatternset(PatternSet p) {
if (isReference()) {
throw noChildrenAllowed();
}
String[] nestedIncludes = p.getIncludePatterns(getProject());
String[] nestedExcludes = p.getExcludePatterns(getProject());
if (nestedIncludes != null) {
for (int i = 0; i < nestedIncludes.length; i++) {
createInclude().setName(nestedIncludes[i]);
}
}
if (nestedExcludes != null) {
for (int i = 0; i < nestedExcludes.length; i++) {
createExclude().setName(nestedExcludes[i]);
}
}
}
/**
* add a name entry on the include list
* @return a nested include element to be configured.
*/
public NameEntry createInclude() {
if (isReference()) {
throw noChildrenAllowed();
}
return addPatternToList(includeList);
}
/**
* add a name entry on the include files list
* @return a nested includesfile element to be configured.
*/
public NameEntry createIncludesFile() {
if (isReference()) {
throw noChildrenAllowed();
}
return addPatternToList(includesFileList);
}
/**
* add a name entry on the exclude list
* @return a nested exclude element to be configured.
*/
public NameEntry createExclude() {
if (isReference()) {
throw noChildrenAllowed();
}
return addPatternToList(excludeList);
}
/**
* add a name entry on the exclude files list
* @return a nested excludesfile element to be configured.
*/
public NameEntry createExcludesFile() {
if (isReference()) {
throw noChildrenAllowed();
}
return addPatternToList(excludesFileList);
}
/**
* Appends <code>includes</code> to the current list of include patterns.
* Patterns may be separated by a comma or a space.
*
* @param includes the string containing the include patterns
*/
public void setIncludes(String includes) {
if (isReference()) {
throw tooManyAttributes();
}
if (includes != null && includes.length() > 0) {
StringTokenizer tok = new StringTokenizer(includes, ", ", false);
while (tok.hasMoreTokens()) {
createInclude().setName(tok.nextToken());
}
}
}
/**
* Appends <code>excludes</code> to the current list of exclude patterns.
* Patterns may be separated by a comma or a space.
*
* @param excludes the string containing the exclude patterns
*/
public void setExcludes(String excludes) {
if (isReference()) {
throw tooManyAttributes();
}
if (excludes != null && excludes.length() > 0) {
StringTokenizer tok = new StringTokenizer(excludes, ", ", false);
while (tok.hasMoreTokens()) {
createExclude().setName(tok.nextToken());
}
}
}
/**
* add a name entry to the given list
*/
private NameEntry addPatternToList(Vector list) {
NameEntry result = new NameEntry();
list.addElement(result);
return result;
}
/**
* Sets the name of the file containing the includes patterns.
*
* @param includesFile The file to fetch the include patterns from.
* @throws BuildException on error.
*/
public void setIncludesfile(File includesFile) throws BuildException {
if (isReference()) {
throw tooManyAttributes();
}
createIncludesFile().setName(includesFile.getAbsolutePath());
}
/**
* Sets the name of the file containing the excludes patterns.
*
* @param excludesFile The file to fetch the exclude patterns from.
* @throws BuildException on error.
*/
public void setExcludesfile(File excludesFile) throws BuildException {
if (isReference()) {
throw tooManyAttributes();
}
createExcludesFile().setName(excludesFile.getAbsolutePath());
}
/**
* Reads path matching patterns from a file and adds them to the
* includes or excludes list (as appropriate).
*/
private void readPatterns(File patternfile, Vector patternlist, Project p)
throws BuildException {
BufferedReader patternReader = null;
try {
// Get a FileReader
patternReader =
new BufferedReader(new FileReader(patternfile));
// Create one NameEntry in the appropriate pattern list for each
// line in the file.
String line = patternReader.readLine();
while (line != null) {
if (line.length() > 0) {
line = p.replaceProperties(line);
addPatternToList(patternlist).setName(line);
}
line = patternReader.readLine();
}
} catch (IOException ioe) {
String msg = "An error occurred while reading from pattern file: "
+ patternfile;
throw new BuildException(msg, ioe);
} finally {
if (null != patternReader) {
try {
patternReader.close();
} catch (IOException ioe) {
//Ignore exception
}
}
}
}
/**
* Adds the patterns of the other instance to this set.
* @param other the other PatternSet instance.
* @param p the current project.
*/
public void append(PatternSet other, Project p) {
if (isReference()) {
throw new BuildException("Cannot append to a reference");
}
String[] incl = other.getIncludePatterns(p);
if (incl != null) {
for (int i = 0; i < incl.length; i++) {
createInclude().setName(incl[i]);
}
}
String[] excl = other.getExcludePatterns(p);
if (excl != null) {
for (int i = 0; i < excl.length; i++) {
createExclude().setName(excl[i]);
}
}
}
/**
* Returns the filtered include patterns.
* @param p the current project.
* @return the filtered included patterns.
*/
public String[] getIncludePatterns(Project p) {
if (isReference()) {
return getRef(p).getIncludePatterns(p);
} else {
readFiles(p);
return makeArray(includeList, p);
}
}
/**
* Returns the filtered include patterns.
* @param p the current project.
* @return the filtered excluded patterns.
*/
public String[] getExcludePatterns(Project p) {
if (isReference()) {
return getRef(p).getExcludePatterns(p);
} else {
readFiles(p);
return makeArray(excludeList, p);
}
}
/**
* Helper for FileSet classes.
* Check if there are patterns defined.
* @param p the current project.
* @return true if there are patterns.
*/
public boolean hasPatterns(Project p) {
if (isReference()) {
return getRef(p).hasPatterns(p);
} else {
return includesFileList.size() > 0 || excludesFileList.size() > 0
|| includeList.size() > 0 || excludeList.size() > 0;
}
}
/**
* Performs the check for circular references and returns the
* referenced PatternSet.
*/
private PatternSet getRef(Project p) {
return (PatternSet) getCheckedRef(p);
}
/**
* Convert a vector of NameEntry elements into an array of Strings.
*/
private String[] makeArray(Vector list, Project p) {
if (list.size() == 0) {
return null;
}
Vector tmpNames = new Vector();
for (Enumeration e = list.elements(); e.hasMoreElements();) {
NameEntry ne = (NameEntry) e.nextElement();
String pattern = ne.evalName(p);
if (pattern != null && pattern.length() > 0) {
tmpNames.addElement(pattern);
}
}
String[] result = new String[tmpNames.size()];
tmpNames.copyInto(result);
return result;
}
/**
* Read includesfile ot excludesfile if not already done so.
*/
private void readFiles(Project p) {
if (includesFileList.size() > 0) {
Enumeration e = includesFileList.elements();
while (e.hasMoreElements()) {
NameEntry ne = (NameEntry) e.nextElement();
String fileName = ne.evalName(p);
if (fileName != null) {
File inclFile = p.resolveFile(fileName);
if (!inclFile.exists()) {
throw new BuildException("Includesfile "
+ inclFile.getAbsolutePath()
+ " not found.");
}
readPatterns(inclFile, includeList, p);
}
}
includesFileList.removeAllElements();
}
if (excludesFileList.size() > 0) {
Enumeration e = excludesFileList.elements();
while (e.hasMoreElements()) {
NameEntry ne = (NameEntry) e.nextElement();
String fileName = ne.evalName(p);
if (fileName != null) {
File exclFile = p.resolveFile(fileName);
if (!exclFile.exists()) {
throw new BuildException("Excludesfile "
+ exclFile.getAbsolutePath()
+ " not found.");
}
readPatterns(exclFile, excludeList, p);
}
}
excludesFileList.removeAllElements();
}
}
/**
* @return a printable form of this object.
*/
public String toString() {
return "patternSet{ includes: " + includeList
+ " excludes: " + excludeList + " }";
}
/**
* @since Ant 1.6
* @return a clone of this patternset.
*/
public Object clone() {
try {
PatternSet ps = (PatternSet) super.clone();
ps.includeList = (Vector) includeList.clone();
ps.excludeList = (Vector) excludeList.clone();
ps.includesFileList = (Vector) includesFileList.clone();
ps.excludesFileList = (Vector) excludesFileList.clone();
return ps;
} catch (CloneNotSupportedException e) {
throw new BuildException(e);
}
}
}
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