summaryrefslogtreecommitdiff
path: root/libjava/classpath/gnu/java/beans/decoder/IndexContext.java
diff options
context:
space:
mode:
Diffstat (limited to 'libjava/classpath/gnu/java/beans/decoder/IndexContext.java')
-rw-r--r--libjava/classpath/gnu/java/beans/decoder/IndexContext.java130
1 files changed, 130 insertions, 0 deletions
diff --git a/libjava/classpath/gnu/java/beans/decoder/IndexContext.java b/libjava/classpath/gnu/java/beans/decoder/IndexContext.java
new file mode 100644
index 000000000..b5af9019f
--- /dev/null
+++ b/libjava/classpath/gnu/java/beans/decoder/IndexContext.java
@@ -0,0 +1,130 @@
+/* gnu.java.beans.decoder.IndexContext
+ Copyright (C) 2004 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING. If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library. Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module. An independent module is a module which is not derived from
+or based on this library. If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so. If you do not wish to do so, delete this
+exception statement from your version. */
+
+package gnu.java.beans.decoder;
+
+/** IndexContext is Context implementation that senses whether it is an indexed get or set
+ * operation and invokes this operation.
+ *
+ * <p>An IndexContent is a get operation when no argument is provided and a set operation if one
+ * argument is provided.</p>
+ *
+ * @author Robert Schuster
+ */
+class IndexContext extends AbstractContext
+{
+ private Object result;
+ private Object argument;
+ private int index;
+ private boolean isSetter;
+
+ IndexContext(String id, int newIndex)
+ {
+ setId(id);
+ index = newIndex;
+ }
+
+ /* (non-Javadoc)
+ * @see gnu.java.beans.decoder.Context#addObject(java.lang.Object)
+ */
+ public void addParameterObject(Object o) throws AssemblyException
+ {
+ if (! isSetter)
+ {
+ argument = o;
+ isSetter = true;
+ }
+ else
+ throw new AssemblyException(new IllegalStateException("More than one argument for indiced access is not possible."));
+ }
+
+ /* (non-Javadoc)
+ * @see gnu.java.beans.decoder.Context#reportStatement()
+ */
+ public void notifyStatement(Context outerContext) throws AssemblyException
+ {
+ throw new AssemblyException(new IllegalStateException("Statements inside indiced access are not allowed."));
+ }
+
+ /* (non-Javadoc)
+ * @see gnu.java.beans.decoder.Context#endContext(gnu.java.beans.decoder.Context)
+ */
+ public Object endContext(Context outerContext) throws AssemblyException
+ {
+ if (isSetter)
+ {
+ // setter
+ outerContext.set(index, argument);
+
+ return null;
+ }
+ else
+ // getter
+ return result = outerContext.get(index);
+ }
+
+ /* (non-Javadoc)
+ * @see gnu.java.beans.decoder.Context#subContextFailed()
+ */
+ public boolean subContextFailed()
+ {
+ // returns true to indicate that indiced access assembly fails when one of its
+ // argument could not be assembled
+ return true;
+ }
+
+ /* (non-Javadoc)
+ * @see gnu.java.beans.decoder.Context#set(int, java.lang.Object)
+ */
+ public void set(int index, Object o) throws AssemblyException
+ {
+ throw new AssemblyException(new IllegalStateException("Setter is not allowed inside indiced access."));
+ }
+
+ /* (non-Javadoc)
+ * @see gnu.java.beans.decoder.Context#get(int)
+ */
+ public Object get(int index) throws AssemblyException
+ {
+ throw new AssemblyException(new IllegalStateException("getter is not allowed insided indiced access."));
+ }
+
+ public Object getResult()
+ {
+ return result;
+ }
+}