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Add flat file serializers and stub out XML serializers.
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9 files changed

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9 files changed

+732
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‎httprpc/build.gradle‎

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@@ -20,7 +20,7 @@ plugins {
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}
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group = 'org.httprpc'
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version = '6.1.1'
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version = '6.2'
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repositories {
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mavenCentral()

‎httprpc/src/main/java/org/httprpc/io/FlatFileDecoder.java‎

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/*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.httprpc.io;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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import java.io.Reader;
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import java.nio.charset.Charset;
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import java.util.ArrayList;
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import java.util.Iterator;
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import java.util.LinkedHashMap;
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import java.util.List;
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import java.util.Map;
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import java.util.NoSuchElementException;
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/**
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* Flat file decoder.
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*/
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public class FlatFileDecoder {
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/**
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* Class representing a field.
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*/
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public static class Field {
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private String key;
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private int length;
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/**
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* Constructs a new field.
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*
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* @param key
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* The field key.
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*
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* @param length
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* The field length.
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*/
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public Field(String key, int length) {
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if (key == null) {
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throw new IllegalArgumentException();
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}
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if (length < 0) {
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throw new IllegalArgumentException();
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}
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this.key = key;
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this.length = length;
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}
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/**
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* Returns the field key.
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*
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* @return
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* The field key.
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*/
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public String getKey() {
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return key;
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}
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/**
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* Returns the field length.
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*
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* @return
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* The field length.
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*/
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public int getLength() {
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return length;
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}
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}
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// Cursor
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private static class Cursor implements Iterable<Map<String, String>> {
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private Reader reader;
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private List<Field> fields;
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private ArrayList<String> values;
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private StringBuilder valueBuilder = new StringBuilder();
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private Iterator<Map<String, String>> iterator = new Iterator<Map<String, String>>() {
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private Boolean hasNext = null;
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@Override
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public boolean hasNext() {
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if (hasNext == null) {
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try {
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values.clear();
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readValues(reader, values);
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} catch (IOException exception) {
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throw new RuntimeException(exception);
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}
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hasNext = !values.isEmpty();
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}
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return hasNext.booleanValue();
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}
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@Override
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public Map<String, String> next() {
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if (!hasNext()) {
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throw new NoSuchElementException();
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}
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LinkedHashMap<String, String> row = new LinkedHashMap<>();
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for (int i = 0, n = Math.min(fields.size(), values.size()); i < n; i++) {
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row.put(fields.get(i).getKey(), values.get(i));
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}
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hasNext = null;
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return row;
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}
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};
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private static final int EOF = -1;
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public Cursor(Reader reader, List<Field> fields) throws IOException {
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this.reader = reader;
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this.fields = fields;
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values = new ArrayList<>(fields.size());
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}
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private void readValues(Reader reader, ArrayList<String> values) throws IOException {
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for (Field field : fields) {
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valueBuilder.setLength(0);
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for (int i = 0, n = field.getLength(); i < n; i++) {
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int c = reader.read();
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if (c == EOF) {
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return;
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}
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valueBuilder.append((char)c);
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}
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String value = valueBuilder.toString();
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for (int i = value.length() - 1; i >= 0; i--) {
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char c = value.charAt(i);
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if (c != ' ') {
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value = value.substring(0, i + 1);
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break;
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}
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}
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values.add(value);
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}
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int c = reader.read();
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if (c == '\r') {
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c = reader.read();
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if (c != '\n') {
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throw new IOException("Improperly terminated record.");
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}
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}
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}
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@Override
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public Iterator<Map<String, String>> iterator() {
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return iterator;
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}
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}
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private List<Field> fields;
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/**
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* Constructs a new flat file decoder.
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*
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* @param fields
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* The input fields.
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*/
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public FlatFileDecoder(List<Field> fields) {
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if (fields == null) {
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throw new IllegalArgumentException();
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}
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this.fields = fields;
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}
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/**
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* Reads a sequence of values from an input stream.
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*
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* @param inputStream
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* The input stream to read from.
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*
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* @return
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* A cursor over the values in the input stream.
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*
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* @throws IOException
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* If an exception occurs.
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*/
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public Iterable<Map<String, String>> read(InputStream inputStream) throws IOException {
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return read(new InputStreamReader(inputStream, Charset.forName("ISO-8859-1")));
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}
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/**
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* Reads a sequence of values from a character stream.
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*
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* @param reader
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* The character stream to read from.
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*
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* @return
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* A cursor over the values in the character stream.
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*
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* @throws IOException
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* If an exception occurs.
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*/
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public Iterable<Map<String, String>> read(Reader reader) throws IOException {
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return new Cursor(new BufferedReader(reader), fields);
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}
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}

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