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Diffstat (limited to 'framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/filters/LineContains.java')
| -rw-r--r-- | framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/filters/LineContains.java | 244 |
1 files changed, 244 insertions, 0 deletions
diff --git a/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/filters/LineContains.java b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/filters/LineContains.java new file mode 100644 index 00000000..c83cae28 --- /dev/null +++ b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/filters/LineContains.java @@ -0,0 +1,244 @@ +/* + * 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; + +/** + * Filter which includes only those lines that contain all the user-specified + * strings. + * + * Example: + * + * <pre><linecontains> + * <contains value="foo"> + * <contains value="bar"> + * </linecontains></pre> + * + * Or: + * + * <pre><filterreader classname="org.apache.tools.ant.filters.LineContains"> + * <param type="contains" value="foo"/> + * <param type="contains" value="bar"/> + * </filterreader></pre> + * + * This will include only those lines that contain <code>foo</code> and + * <code>bar</code>. + * + */ +public final class LineContains + extends BaseParamFilterReader + implements ChainableReader { + /** Parameter name for the words to filter on. */ + private static final String CONTAINS_KEY = "contains"; + + /** Parameter name for the words to filter on. */ + private static final String NEGATE_KEY = "negate"; + + /** Vector that holds the strings that input lines must contain. */ + private Vector<String> contains = new Vector<String>(); + + /** + * 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; + + /** + * Constructor for "dummy" instances. + * + * @see BaseFilterReader#BaseFilterReader() + */ + public LineContains() { + super(); + } + + /** + * Creates a new filtered reader. + * + * @param in A Reader object providing the underlying stream. + * Must not be <code>null</code>. + */ + public LineContains(final Reader in) { + super(in); + } + + /** + * Returns the next character in the filtered stream, only including + * lines from the original stream which contain all of the specified words. + * + * @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 containsSize = contains.size(); + + for (line = readLine(); line != null; line = readLine()) { + boolean matches = true; + for (int i = 0; matches && i < containsSize; i++) { + String containsStr = (String) contains.elementAt(i); + matches = line.indexOf(containsStr) >= 0; + } + if (matches ^ isNegated()) { + break; + } + } + if (line != null) { + return read(); + } + } + return ch; + } + + /** + * Adds a <code>contains</code> element. + * + * @param contains The <code>contains</code> element to add. + * Must not be <code>null</code>. + */ + public void addConfiguredContains(final Contains contains) { + this.contains.addElement(contains.getValue()); + } + + /** + * Set the negation mode. Default false (no negation). + * @param b the boolean negation mode to set. + */ + public void setNegate(boolean b) { + negate = b; + } + + /** + * Find out whether we have been negated. + * @return boolean negation flag. + */ + public boolean isNegated() { + return negate; + } + + /** + * Sets the vector of words which must be contained within a line read + * from the original stream in order for it to match this filter. + * + * @param contains A vector of words which must be contained within a line + * in order for it to match in this filter. Must not be <code>null</code>. + */ + private void setContains(final Vector<String> contains) { + this.contains = contains; + } + + /** + * Returns the vector of words which must be contained within a line read + * from the original stream in order for it to match this filter. + * + * @return the vector of words 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<String> getContains() { + return contains; + } + + /** + * Creates a new LineContains 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) { + LineContains newFilter = new LineContains(rdr); + newFilter.setContains(getContains()); + newFilter.setNegate(isNegated()); + return newFilter; + } + + /** + * Parses the parameters to add user-defined contains strings. + */ + private void initialize() { + Parameter[] params = getParameters(); + if (params != null) { + for (int i = 0; i < params.length; i++) { + if (CONTAINS_KEY.equals(params[i].getType())) { + contains.addElement(params[i].getValue()); + } else if (NEGATE_KEY.equals(params[i].getType())) { + setNegate(Project.toBoolean(params[i].getValue())); + } + } + } + } + + /** + * Holds a contains element + */ + public static class Contains { + + /** User defined contains string */ + private String value; + + /** + * Sets the contains string + * + * @param contains The contains string to set. + * Must not be <code>null</code>. + */ + public final void setValue(String contains) { + value = contains; + } + + /** + * Returns the contains string. + * + * @return the contains string for this element + */ + public final String getValue() { + return value; + } + } +} |