well, if you put the docs in, you need to follow with the code. <hasMethod> looks for methods.

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@420305 13f79535-47bb-0310-9956-ffa450edef68

src/main/org/apache/tools/ant/taskdefs/condition/ConditionBase.java

@@ -338,6 +338,17 @@ public abstract class ConditionBase extends ProjectComponent {
         conditions.addElement(test);
     }
     
+    /**
+     * Add a  <hasMethod> condition.
+     *
+     * @param test the condition
+     * @since Ant 1.7
+     */
+    public void addHasMethod(HasMethod test) {
+        add(test);
+    }
+    
+    
     /**
      * Add an <antversion> condition.
      *

src/main/org/apache/tools/ant/taskdefs/condition/HasMethod.java

@@ -0,0 +1,165 @@
+/*
+ * Copyright  2005 The Apache Software Foundation
+ *
+ *  Licensed 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.taskdefs.condition;
+
+import org.apache.tools.ant.types.Path;
+import org.apache.tools.ant.types.Reference;
+import org.apache.tools.ant.AntClassLoader;
+import org.apache.tools.ant.BuildException;
+import org.apache.tools.ant.ProjectComponent;
+
+import java.lang.reflect.Method;
+import java.lang.reflect.Field;
+
+/**
+ * test for a method
+ */
+public class HasMethod extends ProjectComponent implements Condition {
+    private String classname;
+    private String method;
+    private String field;
+    private Path classpath;
+    private AntClassLoader loader;
+    private boolean ignoreSystemClasses = false;
+
+
+    /**
+     * Set the classpath to be used when searching for classes and resources.
+     *
+     * @param classpath an Ant Path object containing the search path.
+     */
+    public void setClasspath(Path classpath) {
+        createClasspath().append(classpath);
+    }
+
+    /**
+     * Classpath to be used when searching for classes and resources.
+     *
+     * @return an empty Path instance to be configured by Ant.
+     */
+    public Path createClasspath() {
+        if (this.classpath == null) {
+            this.classpath = new Path(getProject());
+        }
+        return this.classpath.createPath();
+    }
+
+    /**
+     * Set the classpath by reference.
+     *
+     * @param r a Reference to a Path instance to be used as the classpath
+     *          value.
+     */
+    public void setClasspathRef(Reference r) {
+        createClasspath().setRefid(r);
+    }
+
+    public void setClassname(String classname) {
+        this.classname = classname;
+    }
+
+    public void setMethod(String method) {
+        this.method = method;
+    }
+
+    public void setField(String field) {
+        this.field = field;
+    }
+
+    public void setIgnoreSystemClasses(boolean ignoreSystemClasses) {
+        this.ignoreSystemClasses = ignoreSystemClasses;
+    }
+
+    /**
+     * Check if a given class can be loaded.
+     */
+    private Class loadClass(String classname) {
+        try {
+            if (ignoreSystemClasses) {
+                loader = getProject().createClassLoader(classpath);
+                loader.setParentFirst(false);
+                loader.addJavaLibraries();
+                if (loader != null) {
+                    try {
+                        return loader.findClass(classname);
+                    } catch (SecurityException se) {
+                        // class found but restricted name; this is
+                        // actually the case we're looking for in JDK 1.3+,
+                        // so catch the exception and return
+                        return null;
+                    }
+                } else {
+                    return null;
+                }
+            } else if (loader != null) {
+                return loader.loadClass(classname);
+            } else {
+                ClassLoader l = this.getClass().getClassLoader();
+                // Can return null to represent the bootstrap class loader.
+                // see API docs of Class.getClassLoader.
+                if (l != null) {
+                    return Class.forName(classname, true, l);
+                } else {
+                    return Class.forName(classname);
+                }
+            }
+        } catch (ClassNotFoundException e) {
+            throw new BuildException("class \"" + classname + "\" was not found");
+        } catch (NoClassDefFoundError e) {
+            throw new BuildException("Could not load dependent class \"" + e.getMessage()
+                    + "\" for class \"" + classname + "\"");
+        }
+    }
+
+
+    public boolean eval() throws BuildException {
+        if(classname==null) {
+            throw new BuildException("No classname defined");
+        }
+        Class clazz=loadClass(classname);
+        if (method!=null) {
+            return isMethodFound(clazz);
+        }
+        if(field!=null) {
+            return isFieldFound(clazz);
+        }
+        throw new BuildException("Neither method nor field defined");
+    }
+
+    private boolean isFieldFound(Class clazz) {
+        Field[] fields = clazz.getDeclaredFields();
+        for(int i=0;i<fields.length;i++) {
+            Field fieldEntry=fields[i];
+            if(fieldEntry.getName().equals(field)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    private boolean isMethodFound(Class clazz) {
+        Method[] methods = clazz.getDeclaredMethods();
+        for(int i=0;i<methods.length;i++) {
+            Method methodEntry =methods[i];
+            if(methodEntry.getName().equals(method)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+}