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author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
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committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/gnu/java/beans/decoder/PropertyContext.java | |
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Diffstat (limited to 'libjava/classpath/gnu/java/beans/decoder/PropertyContext.java')
-rw-r--r-- | libjava/classpath/gnu/java/beans/decoder/PropertyContext.java | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/libjava/classpath/gnu/java/beans/decoder/PropertyContext.java b/libjava/classpath/gnu/java/beans/decoder/PropertyContext.java new file mode 100644 index 000000000..15751cdbc --- /dev/null +++ b/libjava/classpath/gnu/java/beans/decoder/PropertyContext.java @@ -0,0 +1,137 @@ +/* gnu.java.beans.decoder.PropertyContext + 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; + +import java.lang.reflect.InvocationTargetException; +import java.lang.reflect.Method; + +/** PropertyContext is a Context implementation that is very similar to MethodContext + * and IndexContext. The sole purpose of PropertyContext to find out whether it should + * 'set' or 'get' a certain property. This decision is made using the number of + * arguments. + * <p>When the method call has to be made and there is no argument we 'get' the property. + * With one argument it is 'set'.</p> + * + * @author Robert Schuster + */ +class PropertyContext extends AbstractObjectContext +{ + private Object argument; + private String propertyName; + private String prefix = "get"; + private boolean methodCalled; + + PropertyContext(String id, String newPropertyName) + { + setId(id); + propertyName = newPropertyName; + } + + /* (non-Javadoc) + * @see gnu.java.beans.decoder.Context#addObject(java.lang.Object) + */ + public void addParameterObject(Object o) throws AssemblyException + { + if (methodCalled) + throw new AssemblyException(new IllegalArgumentException("Cannot add parameter object when method was already called.")); + + if (argument != null) + throw new AssemblyException(new IllegalArgumentException("Property attribut allows zero or one argument only.")); + + argument = o; + setStatement(true); + prefix = "set"; + } + + /* (non-Javadoc) + * @see gnu.java.beans.decoder.Context#endContext(gnu.java.beans.decoder.Context) + */ + public void notifyStatement(Context outerContext) throws AssemblyException + { + if (methodCalled) + return; + methodCalled = true; + + Object outerObject = outerContext.getResult(); + + if (outerObject == null) + throw new AssemblyException(new NullPointerException("No object to access property " + + propertyName)); + + + // converts property name into a method name + String methodName = prefix + propertyName.substring(0, 1).toUpperCase() + + propertyName.substring(1); + + // prepares the argument + Object[] args = (argument != null) ? new Object[] { argument } : null; + + try + { + Method method = MethodFinder.getMethod(outerObject.getClass(), + methodName, args); + + // stores the result whether it is available or not + setObject(method.invoke(outerObject, args)); + } + catch (NoSuchMethodException nsme) + { + throw new AssemblyException(nsme); + } + catch (InvocationTargetException ite) + { + throw new AssemblyException(ite.getCause()); + } + catch (IllegalAccessException iae) + { + throw new AssemblyException(iae); + } + } + + public Object endContext(Context outerContext) throws AssemblyException + { + notifyStatement(outerContext); + + return getResult(); + } + + public boolean subContextFailed() + { + return ! methodCalled; + } +} |