1 files changed, 70 insertions, 0 deletions
diff --git a/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/filters/util/JavaClassHelper.java b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/filters/util/JavaClassHelper.java
new file mode 100644
index 00000000..b0c67ce2
--- /dev/null
+++ b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/filters/util/JavaClassHelper.java
@@ -0,0 +1,70 @@
+/*
+ *  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.util;
+
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+
+import org.apache.bcel.classfile.ClassParser;
+import org.apache.bcel.classfile.ConstantValue;
+import org.apache.bcel.classfile.Field;
+import org.apache.bcel.classfile.JavaClass;
+
+// CheckStyle:HideUtilityClassConstructorCheck OFF - bc
+/**
+ * Helper class that filters constants from a Java Class
+ *
+ */
+public final class JavaClassHelper {
+    /** System specific line separator. */
+    private static final String LS = System.getProperty("line.separator");
+
+    /**
+     * Get the constants declared in a file as name=value
+     *
+     * @param bytes the class as a array of bytes
+     * @return a StringBuffer contains the name=value pairs
+     * @exception IOException if an error occurs
+     */
+    public static StringBuffer getConstants(final byte[] bytes)
+        throws IOException {
+        final StringBuffer sb = new StringBuffer();
+        final ByteArrayInputStream bis = new ByteArrayInputStream(bytes);
+        final ClassParser parser = new ClassParser(bis, "");
+        final JavaClass javaClass = parser.parse();
+        final Field[] fields = javaClass.getFields();
+        for (int i = 0; i < fields.length; i++) {
+            final Field field = fields[i];
+            if (field != null) {
+                final ConstantValue cv = field.getConstantValue();
+                if (cv != null) {
+                    String cvs = cv.toString();
+                    //Remove start and end quotes if field is a String
+                    if (cvs.startsWith("\"") && cvs.endsWith("\"")) {
+                        cvs = cvs.substring(1, cvs.length() - 1);
+                    }
+                    sb.append(field.getName());
+                    sb.append('=');
+                    sb.append(cvs);
+                    sb.append(LS);
+                }
+            }
+        }
+        return sb;
+    }
+}