diff options
Diffstat (limited to 'framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/selectors/modifiedselector/ChecksumAlgorithm.java')
-rw-r--r-- | framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/selectors/modifiedselector/ChecksumAlgorithm.java | 151 |
1 files changed, 0 insertions, 151 deletions
diff --git a/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/selectors/modifiedselector/ChecksumAlgorithm.java b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/selectors/modifiedselector/ChecksumAlgorithm.java deleted file mode 100644 index 210d5dc9..00000000 --- a/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/selectors/modifiedselector/ChecksumAlgorithm.java +++ /dev/null @@ -1,151 +0,0 @@ -/* - * 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.selectors.modifiedselector; - -import java.io.BufferedInputStream; -import java.io.File; -import java.io.FileInputStream; -import java.security.NoSuchAlgorithmException; -import java.util.Locale; -import java.util.zip.Adler32; -import java.util.zip.CRC32; -import java.util.zip.CheckedInputStream; -import java.util.zip.Checksum; - -import org.apache.tools.ant.BuildException; - - -/** - * Computes a 'checksum' for the content of file using - * java.util.zip.CRC32 and java.util.zip.Adler32. - * Use of this algorithm doesn't require any additional nested <param>s. - * Supported <param>s are: - * <table> - * <tr> - * <th>name</th><th>values</th><th>description</th><th>required</th> - * </tr> - * <tr> - * <td> algorithm.algorithm </td> - * <td> ADLER | CRC ( default ) </td> - * <td> name of the algorithm the checksum should use </td> - * <td> no, defaults to CRC </td> - * </tr> - * </table> - * - * @version 2004-06-17 - * @since Ant 1.7 - */ -public class ChecksumAlgorithm implements Algorithm { - - - // ----- member variables ----- - - - /** - * Checksum algorithm to be used. - */ - private String algorithm = "CRC"; - - /** - * Checksum interface instance - */ - private Checksum checksum = null; - - - // ----- Algorithm-Configuration ----- - - - /** - * Specifies the algorithm to be used to compute the checksum. - * Defaults to "CRC". Other popular algorithms like "ADLER" may be used as well. - * @param algorithm the digest algorithm to use - */ - public void setAlgorithm(String algorithm) { - this.algorithm = - algorithm != null ? algorithm.toUpperCase(Locale.ENGLISH) : null; - } - - - /** Initialize the checksum interface. */ - public void initChecksum() { - if (checksum != null) { - return; - } - if ("CRC".equals(algorithm)) { - checksum = new CRC32(); - } else if ("ADLER".equals(algorithm)) { - checksum = new Adler32(); - } else { - throw new BuildException(new NoSuchAlgorithmException()); - } - } - - - // ----- Logic ----- - - - /** - * This algorithm supports only CRC and Adler. - * @return <i>true</i> if all is ok, otherwise <i>false</i>. - */ - public boolean isValid() { - return "CRC".equals(algorithm) || "ADLER".equals(algorithm); - } - - - /** - * Computes a value for a file content with the specified checksum algorithm. - * @param file File object for which the value should be evaluated. - * @return The value for that file - */ - public String getValue(File file) { - initChecksum(); - String rval = null; - - try { - if (file.canRead()) { - checksum.reset(); - FileInputStream fis = new FileInputStream(file); - CheckedInputStream check = new CheckedInputStream(fis, checksum); - BufferedInputStream in = new BufferedInputStream(check); - while (in.read() != -1) { - // Read the file - } - rval = Long.toString(check.getChecksum().getValue()); - in.close(); - } - } catch (Exception e) { - rval = null; - } - return rval; - } - - - /** - * Override Object.toString(). - * @return some information about this algorithm. - */ - public String toString() { - StringBuilder buf = new StringBuilder(); - buf.append("<ChecksumAlgorithm:"); - buf.append("algorithm=").append(algorithm); - buf.append(">"); - return buf.toString(); - } -} |