--- /dev/null
+/*******************************************************************************
+ * Copyright (c) 2002 International Business Machines Corp. and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Common Public License v0.5
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/cpl-v05.html
+ *
+ * Contributors:
+ * IBM Corporation - initial API and implementation
+ ******************************************************************************/
+package net.sourceforge.phpdt.core;
+
+import net.sourceforge.phpdt.core.compiler.IProblem;
+
+/**
+ * A callback interface for receiving java problem as they are discovered
+ * by some Java operation.
+ *
+ * @see IProblem
+ * @since 2.0
+ */
+public interface IProblemRequestor {
+
+ /**
+ * Notification of a Java problem.
+ *
+ * @param problem IProblem - The discovered Java problem.
+ */
+ void acceptProblem(IProblem problem);
+
+ /**
+ * Notification sent before starting the problem detection process.
+ * Typically, this would tell a problem collector to clear previously recorded problems.
+ */
+ void beginReporting();
+
+ /**
+ * Notification sent after having completed problem detection process.
+ * Typically, this would tell a problem collector that no more problems should be expected in this
+ * iteration.
+ */
+ void endReporting();
+
+ /**
+ * Predicate allowing the problem requestor to signal whether or not it is currently
+ * interested by problem reports. When answering <code>false</false>, problem will
+ * not be discovered any more until the next iteration.
+ *
+ * This predicate will be invoked once prior to each problem detection iteration.
+ *
+ * @return boolean - indicates whether the requestor is currently interested by problems.
+ */
+ boolean isActive();
+}