diff options
Diffstat (limited to 'sca-java-1.x/tags/java-M1-final/java/sca/model/src/main/java/org/apache/tuscany/model/assembly/impl/AssemblyObjectImpl.java')
-rw-r--r-- | sca-java-1.x/tags/java-M1-final/java/sca/model/src/main/java/org/apache/tuscany/model/assembly/impl/AssemblyObjectImpl.java | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/sca-java-1.x/tags/java-M1-final/java/sca/model/src/main/java/org/apache/tuscany/model/assembly/impl/AssemblyObjectImpl.java b/sca-java-1.x/tags/java-M1-final/java/sca/model/src/main/java/org/apache/tuscany/model/assembly/impl/AssemblyObjectImpl.java new file mode 100644 index 0000000000..38056e1e1c --- /dev/null +++ b/sca-java-1.x/tags/java-M1-final/java/sca/model/src/main/java/org/apache/tuscany/model/assembly/impl/AssemblyObjectImpl.java @@ -0,0 +1,123 @@ +/** + * + * Copyright 2005 The Apache Software Foundation or its licensors, as applicable. + * + * 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.apache.tuscany.model.assembly.impl; + +import java.util.Collection; +import java.util.Collections; +import java.util.List; + +import org.apache.tuscany.model.assembly.AssemblyContext; +import org.apache.tuscany.model.assembly.AssemblyObject; +import org.apache.tuscany.model.assembly.AssemblyVisitor; + +/** + * A base class for assembly model objects. + */ +public abstract class AssemblyObjectImpl implements AssemblyObject { + + private boolean frozen; + private boolean initialized; + + protected AssemblyObjectImpl() { + } + + public boolean accept(AssemblyVisitor visitor) { + return visitor.visit(this); + } + + /** + * Walk a visitor through a collection of model objects. + * @param collection + * @param visitor + */ + protected boolean accept(Collection collection, AssemblyVisitor visitor) { + for (Object member : collection) { + if (member instanceof AssemblyObject) { + if (!((AssemblyObject)member).accept(visitor)) + return false; + } + } + return true; + } + + public void freeze() { + if (!frozen) + frozen=true; + } + + /** + * Returns true if the object is frozen + */ + protected boolean isFrozen() { + return frozen; + } + + /** + * Freeze a list and its members + */ + protected <T> List<T> freeze(List<T> list) { + list=Collections.unmodifiableList(list); + for (Object member : list) { + if (member instanceof AssemblyObject) { + ((AssemblyObject)member).freeze(); + } + } + return list; + } + + /** + * Check that the current model object can be modified. + * @throws IllegalStateException + */ + protected void checkNotFrozen() { + if (frozen) + throw new IllegalStateException("Attempt to modify a frozen assembly model"); + } + + public void initialize(AssemblyContext modelContext) { + if (!initialized) + initialized=true; + } + + /** + * Returns true if the object is initialized + */ + protected boolean isInitialized() { + return initialized; + } + + /** + * Initialize members of a collection + */ + protected void initialize(Collection collection, AssemblyContext modelContext) { + for (Object member : collection) { + if (member instanceof AssemblyObject) { + ((AssemblyObject)member).initialize(modelContext); + } + } + } + + /** + * Check that the current model object is initialized. + * @throws IllegalStateException + */ + protected void checkInitialized() { + if (!initialized) + throw new IllegalStateException("Attempt to use an uninitialized assembly model"); + } + +} |