zhao.algorithmMagic.io.OutputObjectBuilder Maven / Gradle / Ivy
package zhao.algorithmMagic.io;
import zhao.algorithmMagic.exception.OperatorOperationException;
import zhao.algorithmMagic.operands.table.Cell;
import zhao.algorithmMagic.operands.table.FinalCell;
import zhao.algorithmMagic.operands.table.SingletonCell;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.OutputStream;
import java.util.HashMap;
/**
* 对象输出组件的构建者类，在该类中可以针对输出对象的流进行设置，并构建出对应的数据流对象。
*
* The builder class of the object output component, in which the flow of the output object can be set and corresponding data flow objects can be constructed.
*
* @author zhao
*/
public class OutputObjectBuilder extends HashMap> implements OutputBuilder {
public final static String OUT_STREAM = "0xfff";
/**
* 添加数据输入描述，不同的组件有不同的配置属性，具体可以参阅实现类。
*
* Add data input descriptions, and different components have different configuration properties. Please refer to the implementation class for details.
*
* @param key 属性名称
*
* Attribute Name.
* @param value 属性数值
*
* Attribute Value.
* @return 链式调用，继续构建
*
* Chain call, continue building.
*/
@Override
public OutputBuilder addOutputArg(String key, FinalCell value) {
this.put(key, value);
return this;
}
/**
* 设置操作的文件对应的路径
*
* @param path 文件的路径。
* @return 链式调用
*/
public OutputBuilder setPath(String path) {
this.addOutputArg(OUT_STREAM, (FinalCell) SingletonCell.$(path));
return this;
}
/**
* 将所需的对象构建出来并获取到对应的输入设备对象。
*
* @return 输入设备对象。
*/
@Override
public OutputComponent create() {
final Object value = this.get(OUT_STREAM).getValue();
if (value instanceof OutputStream) {
return new OutputObject((OutputStream) value);
} else if (value instanceof String) {
try {
return new OutputObject(new FileOutputStream((String) value));
} catch (FileNotFoundException e) {
throw new UnsupportedOperationException(e);
}
}
throw new OperatorOperationException("您提供的 ‘OUT_STREAM’ 参数应为一个包装这 OutputStream 对象的单元格。");
}
}