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Diffstat (limited to 'framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/filters/LineContainsRegExp.java')
| -rw-r--r-- | framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/filters/LineContainsRegExp.java | 242 |
1 files changed, 242 insertions, 0 deletions
diff --git a/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/filters/LineContainsRegExp.java b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/filters/LineContainsRegExp.java new file mode 100644 index 00000000..23a2005d --- /dev/null +++ b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/filters/LineContainsRegExp.java @@ -0,0 +1,242 @@ +/* + * 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 java.util.Vector; + +import org.apache.tools.ant.Project; +import org.apache.tools.ant.types.Parameter; +import org.apache.tools.ant.types.RegularExpression; +import org.apache.tools.ant.util.regexp.Regexp; +import org.apache.tools.ant.util.regexp.RegexpUtil; + +/** + * Filter which includes only those lines that contain the user-specified + * regular expression matching strings. + * + * Example: + * <pre><linecontainsregexp> + * <regexp pattern="foo*"> + * </linecontainsregexp></pre> + * + * Or: + * + * <pre><filterreader classname="org.apache.tools.ant.filters.LineContainsRegExp"> + * <param type="regexp" value="foo*"/> + * </filterreader></pre> + * + * This will fetch all those lines that contain the pattern <code>foo</code> + * + */ +public final class LineContainsRegExp + extends BaseParamFilterReader + implements ChainableReader { + /** Parameter name for the regular expression to filter on. */ + private static final String REGEXP_KEY = "regexp"; + + /** Parameter name for the negate attribute. */ + private static final String NEGATE_KEY = "negate"; + + /** Parameter name for the casesensitive attribute. */ + private static final String CS_KEY = "casesensitive"; + + /** Vector that holds the expressions that input lines must contain. */ + private Vector<RegularExpression> regexps = new Vector<RegularExpression>(); + + /** + * Remaining line to be read from this filter, or <code>null</code> if + * the next call to <code>read()</code> should read the original stream + * to find the next matching line. + */ + private String line = null; + + private boolean negate = false; + private int regexpOptions = Regexp.MATCH_DEFAULT; + + /** + * Constructor for "dummy" instances. + * + * @see BaseFilterReader#BaseFilterReader() + */ + public LineContainsRegExp() { + super(); + } + + /** + * Creates a new filtered reader. + * + * @param in A Reader object providing the underlying stream. + * Must not be <code>null</code>. + */ + public LineContainsRegExp(final Reader in) { + super(in); + } + + /** + * Returns the next character in the filtered stream, only including + * lines from the original stream which match all of the specified + * regular expressions. + * + * @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 (line != null) { + ch = line.charAt(0); + if (line.length() == 1) { + line = null; + } else { + line = line.substring(1); + } + } else { + final int regexpsSize = regexps.size(); + + for (line = readLine(); line != null; line = readLine()) { + boolean matches = true; + for (int i = 0; matches && i < regexpsSize; i++) { + RegularExpression regexp + = (RegularExpression) regexps.elementAt(i); + Regexp re = regexp.getRegexp(getProject()); + matches = re.matches(line, regexpOptions); + } + if (matches ^ isNegated()) { + break; + } + } + if (line != null) { + return read(); + } + } + return ch; + } + + /** + * Adds a <code>regexp</code> element. + * + * @param regExp The <code>regexp</code> element to add. + * Must not be <code>null</code>. + */ + public void addConfiguredRegexp(final RegularExpression regExp) { + this.regexps.addElement(regExp); + } + + /** + * Sets the vector of regular expressions which must be contained within + * a line read from the original stream in order for it to match this + * filter. + * + * @param regexps A vector of regular expressions which must be contained + * within a line in order for it to match in this filter. Must not be + * <code>null</code>. + */ + private void setRegexps(final Vector<RegularExpression> regexps) { + this.regexps = regexps; + } + + /** + * Returns the vector of regular expressions which must be contained within + * a line read from the original stream in order for it to match this + * filter. + * + * @return the vector of regular expressions which must be contained within + * a line read from the original stream in order for it to match this + * filter. The returned object is "live" - in other words, changes made to + * the returned object are mirrored in the filter. + */ + private Vector<RegularExpression> getRegexps() { + return regexps; + } + + /** + * Creates a new LineContainsRegExp 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) { + LineContainsRegExp newFilter = new LineContainsRegExp(rdr); + newFilter.setRegexps(getRegexps()); + newFilter.setNegate(isNegated()); + newFilter + .setCaseSensitive(!RegexpUtil.hasFlag(regexpOptions, + Regexp.MATCH_CASE_INSENSITIVE) + ); + return newFilter; + } + + /** + * Set the negation mode. Default false (no negation). + * @param b the boolean negation mode to set. + */ + public void setNegate(boolean b) { + negate = b; + } + + /** + * Whether to match casesensitevly. + * @since Ant 1.8.2 + */ + public void setCaseSensitive(boolean b) { + regexpOptions = RegexpUtil.asOptions(b); + } + + /** + * Find out whether we have been negated. + * @return boolean negation flag. + */ + public boolean isNegated() { + return negate; + } + + /** + * Parses parameters to add user defined regular expressions. + */ + private 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); + } else if (NEGATE_KEY.equals(params[i].getType())) { + setNegate(Project.toBoolean(params[i].getValue())); + } else if (CS_KEY.equals(params[i].getType())) { + setCaseSensitive(Project.toBoolean(params[i].getValue())); + } + } + } + } +} |