diff --git a/proposal/sandbox/filterreaders/src/main/org/apache/tools/ant/filters/ClassConstants.java b/proposal/sandbox/filterreaders/src/main/org/apache/tools/ant/filters/ClassConstants.java
new file mode 100644
index 000000000..a1446bfae
--- /dev/null
+++ b/proposal/sandbox/filterreaders/src/main/org/apache/tools/ant/filters/ClassConstants.java
@@ -0,0 +1,182 @@
+/*
+ * The Apache Software License, Version 1.1
+ *
+ * Copyright (c) 2002 The Apache Software Foundation. All rights
+ * reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * 3. The end-user documentation included with the redistribution, if
+ * any, must include the following acknowlegement:
+ * "This product includes software developed by the
+ * Apache Software Foundation (http://www.apache.org/)."
+ * Alternately, this acknowlegement may appear in the software itself,
+ * if and wherever such third-party acknowlegements normally appear.
+ *
+ * 4. The names "The Jakarta Project", "Ant", and "Apache Software
+ * Foundation" must not be used to endorse or promote products derived
+ * from this software without prior written permission. For written
+ * permission, please contact apache@apache.org.
+ *
+ * 5. Products derived from this software may not be called "Apache"
+ * nor may "Apache" appear in their names without prior written
+ * permission of the Apache Group.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This software consists of voluntary contributions made by many
+ * individuals on behalf of the Apache Software Foundation. For more
+ * information on the Apache Software Foundation, please see
+ * .
+ */
+package org.apache.tools.ant.filters;
+
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+import java.io.Reader;
+
+import org.apache.tools.ant.Project;
+
+import org.apache.bcel.*;
+import org.apache.bcel.classfile.*;
+
+/**
+ * Assemble the constants declared in a file in
+ * key1=value1(line separator)key2=value2
+ * format
+ *
+ * Notes:
+ * =====
+ * 1. This filter uses the BCEL external toolkit.
+ * 2. This assembles only those constants that are not created
+ * using the syntax new whatever().
+ * 3. This assembles constants declared using the basic datatypes
+ * and String only.
+ * 4. The access modifiers of the declared constants do not matter.
+ *
+ * Example:
+ * =======
+ *
+ * <classconstants/>
+ *
+ * Or:
+ *
+ * <filterreader classname="org.apache.tools.ant.filters.ClassConstants"/>
+ *
+ * @author Magesh Umasankar
+ */
+public final class ClassConstants
+ extends BaseFilterReader
+ implements ChainableReader
+{
+ /** System specific line separator. */
+ private static final String LS = System.getProperty("line.separator");
+
+ /** Data that must be read from, if not null. */
+ private String queuedData = null;
+
+ /**
+ * This constructor is a dummy constructor and is
+ * not meant to be used by any class other than Ant's
+ * introspection mechanism. This will close the filter
+ * that is created making it useless for further operations.
+ */
+ public ClassConstants() {
+ super();
+ }
+
+ /**
+ * Create a new filtered reader.
+ *
+ * @param in a Reader object providing the underlying stream.
+ */
+ public ClassConstants(final Reader in) {
+ super(in);
+ }
+
+ /**
+ * Read and assemble the constants declared in a class file.
+ */
+ public final int read() throws IOException {
+
+ int ch = -1;
+
+ if (queuedData != null && queuedData.length() == 0) {
+ queuedData = null;
+ }
+
+ if (queuedData != null) {
+ ch = queuedData.charAt(0);
+ queuedData = queuedData.substring(1);
+ if (queuedData.length() == 0) {
+ queuedData = null;
+ }
+ } else {
+ String clazz = readFully();
+ if (clazz == null) {
+ ch = -1;
+ } else {
+ byte[] bytes = clazz.getBytes();
+ StringBuffer sb = new StringBuffer();
+ ByteArrayInputStream bis = new ByteArrayInputStream(bytes);
+ ClassParser parser = new ClassParser(bis, "");
+ JavaClass javaClass = parser.parse();
+ Field[] fields = javaClass.getFields();
+ for (int i = 0; i < fields.length; i++) {
+ Field field = fields[i];
+ if (field != null) {
+ 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);
+ }
+ }
+ }
+
+ if (sb.length() > 0) {
+ queuedData = sb.toString();
+ return read();
+ }
+ }
+ }
+ return ch;
+ }
+
+ /**
+ * Create a new ClassConstants using the passed in
+ * Reader for instantiation.
+ */
+ public final Reader chain(final Reader rdr) {
+ ClassConstants newFilter = new ClassConstants(rdr);
+ return newFilter;
+ }
+}
diff --git a/proposal/sandbox/filterreaders/src/main/org/apache/tools/ant/types/FilterChain.java b/proposal/sandbox/filterreaders/src/main/org/apache/tools/ant/types/FilterChain.java
index b8af0ea71..d5a8c6b04 100644
--- a/proposal/sandbox/filterreaders/src/main/org/apache/tools/ant/types/FilterChain.java
+++ b/proposal/sandbox/filterreaders/src/main/org/apache/tools/ant/types/FilterChain.java
@@ -55,6 +55,7 @@ package org.apache.tools.ant.types;
import java.util.Vector;
+import org.apache.tools.ant.filters.ClassConstants;
import org.apache.tools.ant.filters.ExpandProperties;
import org.apache.tools.ant.filters.HeadFilter;
import org.apache.tools.ant.filters.LineContains;
@@ -84,6 +85,10 @@ public final class FilterChain {
return filterReaders;
}
+ public final void addClassConstants(final ClassConstants classConstants) {
+ filterReaders.addElement(classConstants);
+ }
+
public final void addExpandProperties(final ExpandProperties expandProperties) {
filterReaders.addElement(expandProperties);
}