freemarker.core.StringArraySequence Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 freemarker.core;
import freemarker.template.SimpleScalar;
import freemarker.template.TemplateModel;
import freemarker.template.TemplateScalarModel;
import freemarker.template.TemplateSequenceModel;
/**
* Sequence variable implementation that wraps a String[] with relatively low
* resource utilization. Warning: it does not copy the wrapped array, so do
* not modify that after the model was made!
*/
public class StringArraySequence implements TemplateSequenceModel {
private String[] stringArray;
private TemplateScalarModel[] array;
/**
* Warning: Does not copy the argument array!
*/
public StringArraySequence(String[] stringArray) {
this.stringArray = stringArray;
}
public TemplateModel get(int index) {
if (array == null) {
array = new TemplateScalarModel[stringArray.length];
}
TemplateScalarModel result = array[index];
if (result == null) {
result = new SimpleScalar(stringArray[index]);
array[index] = result;
}
return result;
}
public int size() {
return stringArray.length;
}
}