content: /*
   *  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
   *
   *      https://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.selectors;
  
  import java.io.BufferedReader;
  import java.io.File;
  import java.io.IOException;
  import java.io.InputStreamReader;
  import java.nio.charset.Charset;
  
  import org.apache.tools.ant.BuildException;
  import org.apache.tools.ant.Project;
  import org.apache.tools.ant.types.Parameter;
  import org.apache.tools.ant.types.Resource;
  import org.apache.tools.ant.types.resources.FileResource;
  import org.apache.tools.ant.types.resources.selectors.ResourceSelector;
  
  /**
   * Selector that filters files/resources based on whether they contain a
   * particular string.
   *
   * @since 1.5
   */
  public class ContainsSelector extends BaseExtendSelector implements ResourceSelector {
  
      /** Key to used for parameterized custom selector */
      public static final String EXPRESSION_KEY = "expression";
      /** Used for parameterized custom selector */
      public static final String CONTAINS_KEY = "text";
      /** Used for parameterized custom selector */
      public static final String CASE_KEY = "casesensitive";
      /** Used for parameterized custom selector */
      public static final String WHITESPACE_KEY = "ignorewhitespace";
  
      private String contains = null;
      private boolean casesensitive = true;
      private boolean ignorewhitespace = false;
      private String encoding = null;
  
      /**
       * @return a string describing this object
       */
      public String toString() {
          return String.format("{containsselector text: \"%s\" casesensitive: %s ignorewhitespace: %s}",
                  contains, casesensitive, ignorewhitespace);
      }
  
      /**
       * The string to search for within a file.
       *
       * @param contains the string that a file must contain to be selected.
       */
      public void setText(String contains) {
          this.contains = contains;
      }
  
      /**
       * The encoding of the resources processed
       * @since Ant 1.9.0
       * @param encoding encoding of the resources processed
       */
      public void setEncoding(String encoding) {
          this.encoding = encoding;
      }
  
      /**
       * Whether to ignore case in the string being searched.
       *
       * @param casesensitive whether to pay attention to case sensitivity
       */
      public void setCasesensitive(boolean casesensitive) {
          this.casesensitive = casesensitive;
      }
  
      /**
       * Whether to ignore whitespace in the string being searched.
       *
       * @param ignorewhitespace whether to ignore any whitespace
       *        (spaces, tabs, etc.) in the searchstring
       */
      public void setIgnorewhitespace(boolean ignorewhitespace) {
          this.ignorewhitespace = ignorewhitespace;
      }
  
      /**
       * When using this as a custom selector, this method will be called.
       * It translates each parameter into the appropriate setXXX() call.
       *
       * @param parameters the complete set of parameters for this selector
       */
      public void setParameters(Parameter... parameters) {
          super.setParameters(parameters);
          if (parameters != null) {
              for (Parameter parameter : parameters) {
                  String paramname = parameter.getName();
                  if (CONTAINS_KEY.equalsIgnoreCase(paramname)) {
                      setText(parameter.getValue());
                  } else if (CASE_KEY.equalsIgnoreCase(paramname)) {
                      setCasesensitive(Project.toBoolean(
                              parameter.getValue()));
                  } else if (WHITESPACE_KEY.equalsIgnoreCase(paramname)) {
                      setIgnorewhitespace(Project.toBoolean(
                              parameter.getValue()));
                  } else {
                      setError("Invalid parameter " + paramname);
                  }
              }
          }
      }
  
      /**
       * Checks to make sure all settings are kosher. In this case, it
       * means that the pattern attribute has been set.
       *
       */
      public void verifySettings() {
          if (contains == null) {
              setError("The text attribute is required");
          }
      }
  
      /**
       * The heart of the matter. This is where the selector gets to decide
       * on the inclusion of a file in a particular fileset.
       *
       * @param basedir the base directory the scan is being done from
       * @param filename is the name of the file to check
       * @param file is a java.io.File object the selector can use
       * @return whether the file should be selected or not
       */
      public boolean isSelected(File basedir, String filename, File file) {
          return isSelected(new FileResource(file));
      }
  
      /**
       * The heart of the matter. This is where the selector gets to decide
       * on the inclusion of a Resource.
       *
       * @param r the Resource to check.
       * @return whether the Resource is selected.
       */
      public boolean isSelected(Resource r) {
          // throw BuildException on error
          validate();
  
          if (r.isDirectory() || contains.isEmpty()) {
              return true;
          }
  
          String userstr = contains;
          if (!casesensitive) {
              userstr = contains.toLowerCase();
          }
          if (ignorewhitespace) {
              userstr = SelectorUtils.removeWhitespace(userstr);
          }
          try (BufferedReader in = new BufferedReader(
              new InputStreamReader(r.getInputStream(), encoding == null
                  ? Charset.defaultCharset() : Charset.forName(encoding)))) {
              try {
                  String teststr = in.readLine();
                  while (teststr != null) {
                      if (!casesensitive) {
                          teststr = teststr.toLowerCase();
                      }
                      if (ignorewhitespace) {
                          teststr = SelectorUtils.removeWhitespace(teststr);
                      }
                      if (teststr.contains(userstr)) {
                          return true;
                      }
                      teststr = in.readLine();
                  }
                  return false;
              } catch (IOException ioe) {
                  throw new BuildException("Could not read " + r.toLongString());
              }
          } catch (IOException e) {
              throw new BuildException(
                  "Could not get InputStream from " + r.toLongString(), e);
          }
      }
  }
  