Added to fix the issue of many property override warning when build with -v option; and also improve the build performance.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@1318 6f19259b-4bc3-4df7-8a09-765794883524

Tools/Source/GenBuild/org/tianocore/build/global/PropertyManager.java

@@ -0,0 +1,100 @@
+package org.tianocore.build.global;
+
+import java.util.HashMap;
+import java.util.Hashtable;
+import java.util.Iterator;
+import java.util.Set;
+import java.util.Stack;
+
+import org.apache.tools.ant.Project;
+import org.apache.tools.ant.PropertyHelper;
+
+public class PropertyManager {
+    private static Stack<HashMap<String, String>> propertyTableStack = new Stack<HashMap<String, String>>();
+    private static HashMap<String, String> orgPropertyTable = null;
+    private static HashMap<String, String> oldPropertyTable = null;
+    private static HashMap<String, String> bakPropertyTable = null;
+    private static Project prj = null;
+
+    public static void save() {
+        if (orgPropertyTable == null) {
+            Hashtable prjProperties = prj.getProperties();
+            orgPropertyTable = new HashMap<String, String>();
+
+            Set keys = prjProperties.keySet();
+            Iterator iter = keys.iterator();
+            while (iter.hasNext()) {
+                String item = (String)iter.next();
+                orgPropertyTable.put(item, (String)prjProperties.get(item));
+            }
+        }
+
+        if (bakPropertyTable != null) {
+            propertyTableStack.push(bakPropertyTable);
+            oldPropertyTable = bakPropertyTable;
+        } else {
+            oldPropertyTable = orgPropertyTable;
+        }
+        bakPropertyTable = new HashMap<String, String>();
+    }
+
+    public static void restore() {
+        if (bakPropertyTable == null) {
+            return;
+        }
+        Set keys = bakPropertyTable.keySet();
+
+        Iterator iter = keys.iterator();
+        while (iter.hasNext()) {
+            String name = (String)iter.next();
+            String value = (String)bakPropertyTable.get(name);
+            setProperty(prj, name, value);
+        }
+
+        if (propertyTableStack.size() > 0) {
+            bakPropertyTable = (HashMap<String, String>)propertyTableStack.pop();
+        } else {
+            bakPropertyTable = null;
+        }
+
+        if (propertyTableStack.size() == 0) {
+            oldPropertyTable = orgPropertyTable;
+        } else {
+            oldPropertyTable = (HashMap<String, String>)propertyTableStack.peek();
+        }
+    }
+
+    public static void setProject(Project prj) {
+        PropertyManager.prj = prj;
+    }
+
+    public static void setProperty(String name, String value) {
+        if (prj == null) {
+            return;
+        }
+
+        setProperty(prj, name, value);
+
+        if (oldPropertyTable == null || bakPropertyTable == null) {
+            return;
+        }
+
+        String oldValue = oldPropertyTable.get(name);
+        if (oldValue == null) {
+            oldValue = value;
+        }
+        bakPropertyTable.put(name, oldValue);
+    }
+
+    public static void setProperty(Project project, String name, String value) {
+        if (project == null) {
+            if (prj == null) {
+                return;
+            }
+            project = prj;
+        }
+
+        PropertyHelper.getPropertyHelper(project).setProperty(null, name, value, false);
+    }
+}
+