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/*
* TextList.java December 2012
*
* Copyright (C) 2012, Niall Gallagher
*
* 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.simpleframework.xml.core;
import java.util.Collection;
import org.simpleframework.xml.strategy.Type;
import org.simpleframework.xml.stream.InputNode;
import org.simpleframework.xml.stream.OutputNode;
/**
* This TextList
object is a converter that is used
* to read free text and insert that text in to a list. Collecting
* free text in this way allows unstructured XML to be processed
* and stored in an ordered way, which will allow it to be written
* as identical XML during the serialization process.
*
* @author Niall Gallagher
*/
class TextList implements Repeater {
/**
* This is the factory that is used to create the containing list.
*/
private final CollectionFactory factory;
/**
* This is the primitive object used to read the free text.
*/
private final Primitive primitive;
/**
* This is a string type which is used for all free text data.
*/
private final Type type;
/**
* Constructor for the TextList
object. This is used
* to create a converter that can read free text from between
* elements in an ElementListUnion
. Converting the
* free text in this way allows unstructured XML to be processed.
*
* @param context this is the context that is used for this
* @param list this is the list type this will be used with
* @param label this is the label this the text is declared with
*/
public TextList(Context context, Type list, Label label) {
this.type = new ClassType(String.class);
this.factory = new CollectionFactory(context, list);
this.primitive = new Primitive(context, type);
}
/**
* The read
method reads an object to a specific type
* from the provided node. If the node provided is an attribute
* then the object must be a primitive such as a string, integer,
* boolean, or any of the other Java primitive types.
*
* @param node contains the details used to deserialize the object
*
* @return a fully deserialized object will all its fields
*/
public Object read(InputNode node) throws Exception {
Instance value = factory.getInstance(node);
Object data = value.getInstance();
if(value.isReference()) {
return value.getInstance();
}
return read(node, data);
}
/**
* The read
method reads an object to a specific type
* from the provided node. If the node provided is an attribute
* then the object must be a primitive such as a string, integer,
* boolean, or any of the other Java primitive types.
*
* @param node contains the details used to deserialize the object
* @param value this is the value to read the objects in to
*
* @return a fully deserialized object will all its fields
*/
public Object read(InputNode node, Object result) throws Exception {
Collection list = (Collection) result;
Object value = primitive.read(node);
if(value != null) {
list.add(value);
}
return result;
}
/**
* The validate
method is used to validate the class
* XML schema against an input source. This will traverse the class
* fields and methods ensuring that the input XML document contains
* a valid structure when compared against the class XML schema.
*
* @param node contains the details used to validate the object
*
* @return true if the document matches the class XML schema
*/
public boolean validate(InputNode node) throws Exception {
return true;
}
/**
* The write
method writes the fields from the given
* object to the XML element. After this has finished the element
* contains all attributes and sub-elements from the object.
*
* @param object this is the object to be written to the element
* @param node this is the element that is to be populated
*/
public void write(OutputNode node, Object object) throws Exception {
Collection list = (Collection) object;
OutputNode parent = node.getParent();
for(Object item : list) {
primitive.write(parent, item);
}
}
}