X-Git-Url: http://git.argeo.org/?a=blobdiff_plain;f=org.argeo.slc.core%2Fsrc%2Forg%2Fargeo%2Fslc%2Fcore%2Fexecution%2FParameterRef.java;fp=org.argeo.slc.core%2Fsrc%2Forg%2Fargeo%2Fslc%2Fcore%2Fexecution%2FParameterRef.java;h=5a9d9adcfe0af3cb62ec5efb3be4e3696e4dc805;hb=a9b97cc33383ded70277f49aa287f84903334e70;hp=0000000000000000000000000000000000000000;hpb=d1298659fe6f179d1cbbc8c89f108a0bbc5b4edf;p=gpl%2Fargeo-slc.git

diff --git a/org.argeo.slc.core/src/org/argeo/slc/core/execution/ParameterRef.java b/org.argeo.slc.core/src/org/argeo/slc/core/execution/ParameterRef.java
new file mode 100644
index 000000000..5a9d9adcf
--- /dev/null
+++ b/org.argeo.slc.core/src/org/argeo/slc/core/execution/ParameterRef.java
@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2007-2012 Argeo GmbH
+ *
+ * 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.argeo.slc.core.execution;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.springframework.beans.factory.FactoryBean;
+
+public class ParameterRef implements FactoryBean {
+	private final static Log log = LogFactory.getLog(ParameterRef.class);
+
+	private InstantiationManager instantiationManager;
+	private String name;
+
+	/** Cached object. */
+	private Object object;
+
+	public ParameterRef() {
+	}
+
+	public ParameterRef(String name) {
+		this.name = name;
+	}
+
+	public Object getObject() throws Exception {
+		if (log.isTraceEnabled())
+			log.debug("Parameter ref called for " + name);
+
+		if (object == null)
+			object = instantiationManager.getInitializingFlowParameter(name);
+		return object;
+	}
+
+	public Class<?> getObjectType() {
+		if (object == null)
+			return instantiationManager.getInitializingFlowParameterClass(name);
+		else
+			return object.getClass();
+	}
+
+	public boolean isSingleton() {
+		return true;
+	}
+
+	public void setInstantiationManager(
+			InstantiationManager instantiationManager) {
+		this.instantiationManager = instantiationManager;
+	}
+
+	public void setName(String name) {
+		this.name = name;
+	}
+
+}