| /* |
| * Copyright (C) The Apache Software Foundation. All rights reserved. |
| * |
| * This software is published under the terms of the Apache Software License |
| * version 1.1, a copy of which has been included with this distribution in |
| * the LICENSE file. |
| */ |
| package org.apache.myrmidon.libs.core; |
| |
| import org.apache.avalon.framework.component.ComponentException; |
| import org.apache.avalon.framework.component.ComponentManager; |
| import org.apache.avalon.framework.component.Composable; |
| import org.apache.avalon.framework.configuration.Configurable; |
| import org.apache.avalon.framework.configuration.Configuration; |
| import org.apache.avalon.framework.configuration.ConfigurationException; |
| import org.apache.myrmidon.api.TaskContext; |
| import org.apache.myrmidon.api.TaskException; |
| import org.apache.myrmidon.components.type.TypeException; |
| import org.apache.myrmidon.components.type.TypeFactory; |
| import org.apache.myrmidon.components.type.TypeManager; |
| import org.apache.myrmidon.framework.AbstractContainerTask; |
| import org.apache.myrmidon.framework.DataType; |
| |
| /** |
| * This is the property "task" to declare a binding of a datatype to a name. |
| * |
| * TODO: Determine final format of property task. |
| * |
| * @author <a href="mailto:donaldp@apache.org">Peter Donald</a> |
| */ |
| public class Property |
| extends AbstractContainerTask |
| implements Configurable |
| { |
| private String m_name; |
| private Object m_value; |
| private boolean m_localScope = true; |
| private TypeFactory m_factory; |
| |
| public void compose( final ComponentManager componentManager ) |
| throws ComponentException |
| { |
| super.compose( componentManager ); |
| |
| final TypeManager typeManager = (TypeManager)componentManager.lookup( TypeManager.ROLE ); |
| try { m_factory = typeManager.getFactory( DataType.ROLE ); } |
| catch( final TypeException te ) |
| { |
| throw new ComponentException( "Unable to retrieve factory from TypeManager", te ); |
| } |
| } |
| |
| public void configure( final Configuration configuration ) |
| throws ConfigurationException |
| { |
| final String[] attributes = configuration.getAttributeNames(); |
| for( int i = 0; i < attributes.length; i++ ) |
| { |
| final String name = attributes[ i ]; |
| final String value = configuration.getAttribute( name ); |
| configure( this, name, value ); |
| } |
| |
| final Configuration[] children = configuration.getChildren(); |
| for( int i = 0; i < children.length; i++ ) |
| { |
| try |
| { |
| final DataType value = (DataType)m_factory.create( children[ i ].getName() ); |
| configure( value, children[ i ] ); |
| setValue( value ); |
| } |
| catch( final Exception e ) |
| { |
| throw new ConfigurationException( "Unable to set datatype", e ); |
| } |
| } |
| } |
| |
| public void setName( final String name ) |
| { |
| m_name = name; |
| } |
| |
| public void setValue( final Object value ) |
| throws TaskException |
| { |
| if( null != m_value ) |
| { |
| throw new TaskException( "Value can not be set multiple times" ); |
| } |
| |
| m_value = value; |
| } |
| |
| public void setLocalScope( final boolean localScope ) |
| { |
| m_localScope = localScope; |
| } |
| |
| public void execute() |
| throws TaskException |
| { |
| if( null == m_name ) |
| { |
| throw new TaskException( "Name must be specified" ); |
| } |
| |
| if( null == m_value ) |
| { |
| throw new TaskException( "Value must be specified" ); |
| } |
| |
| if( m_localScope ) |
| { |
| getContext().setProperty( m_name, m_value ); |
| } |
| else |
| { |
| getContext().setProperty( m_name, m_value, TaskContext.PARENT ); |
| } |
| } |
| } |