8000 vpack: vpack-json parser · anderick/arangodb-java-driver@6a9680e · GitHub
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Mark
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vpack: vpack-json parser
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‎src/main/java/com/arangodb/velocypack/VPackParser.java

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package com.arangodb.velocypack;
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import java.text.DateFormat;
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import java.util.Locale;
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/**
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* @author Mark - mark@arangodb.com
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*
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*/
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public class VPackParser {
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private static final String OBJECT_OPEN = "{";
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private static final String OBJECT_CLOSE = "}";
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private static final String ARRAY_OPEN = "[";
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private static final String ARRAY_CLOSE = "]";
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private static final String STRING = "\"";
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private static final String FIELD = ":";
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private static final String SEPERATOR = ",";
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private static final DateFormat DATEFORMAT = DateFormat.getDateTimeInstance(DateFormat.DEFAULT, DateFormat.DEFAULT,
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Locale.US);
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public static String toJson(final VPackSlice vpack) {
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final StringBuilder json = new StringBuilder();
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parse(null, vpack, json);
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return json.toString();
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}
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private static void parse(final VPackSlice attribute, final VPackSlice value, final StringBuilder json) {
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if (attribute != null && attribute.isString()) {
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appendField(attribute, json);
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}
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if (value.isObject()) {
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parseObject(value, json);
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} else if (value.isArray()) {
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parseArray(value, json);
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} else if (value.isBoolean()) {
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json.append(value.getAsBoolean());
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} else if (value.isString()) {
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json.append(STRING);
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json.append(value.getAsString());
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json.append(STRING);
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} else if (value.isNumber()) {
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json.append(value.getAsNumber());
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} else if (value.isDate()) {
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json.append(STRING);
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json.append(DATEFORMAT.format(value.getAsDate()));
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json.append(STRING);
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}
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}
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private static void appendField(final VPackSlice attribute, final StringBuilder json) {
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json.append(STRING);
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json.append(attribute.getAsString());
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json.append(STRING);
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json.append(FIELD);
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}
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private static void parseObject(final VPackSlice value, final StringBuilder json) {
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json.append(OBJECT_OPEN);
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for (int i = 0; i < value.getLength(); i++) {
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if (i > 0) {
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json.append(SEPERATOR);
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}
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parse(value.keyAt(i), value.valueAt(i), json);
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}
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json.append(OBJECT_CLOSE);
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}
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private static void parseArray(final VPackSlice value, final StringBuilder json) {
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json.append(ARRAY_OPEN);
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for (int i = 0; i < value.getLength(); i++) {
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if (i > 0) {
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json.append(SEPERATOR);
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}
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parse(null, value.at(i), json);
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}
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json.append(ARRAY_CLOSE);
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}
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}

‎src/test/java/com/arangodb/velocypack/VPackParserTest.java

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package com.arangodb.velocypack;
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import java.util.Date;
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import org.junit.Assert;
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import org.junit.Test;
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import com.arangodb.velocypack.exception.VPackException;
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import com.arangodb.velocypack.util.Value;
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import com.arangodb.velocypack.util.ValueType;
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/**
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* @author Mark - mark@arangodb.com
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*
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*/
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public class VPackParserTest {
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@Test
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public void object1Field() throws VPackException {
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final VPackBuilder builder = new VPackBuilder();
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builder.add(new Value(ValueType.OBJECT));
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builder.add("a", new Value("test"));
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builder.close();
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final String json = VPackParser.toJson(builder.slice());
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Assert.assertEquals("{\"a\":\"test\"}", json);
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}
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@Test
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public void object2Fields() throws VPackException {
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final VPackBuilder builder = new VPackBuilder();
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builder.add(new Value(ValueType.OBJECT));
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builder.add("a", new Value("test"));
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builder.add("b", new Value(true));
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builder.close();
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final String json = VPackParser.toJson(builder.slice());
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Assert.assertEquals("{\"a\":\"test\",\"b\":true}", json);
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}
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@Test
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public void objectStringField() throws VPackException {
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final VPackBuilder builder = new VPackBuilder();
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builder.add(new Value(ValueType.OBJECT));
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builder.add("a", new Value("test"));
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builder.add("b", new Value("test"));
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builder.close();
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final String json = VPackParser.toJson(builder.slice());
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Assert.assertEquals("{\"a\":\"test\",\"b\":\"test\"}", json);
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}
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@Test
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public void objectBooleanField() throws VPackException {
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final VPackBuilder builder = new VPackBuilder();
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builder.add(new Value(ValueType.OBJECT));
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builder.add("a", new Value(true));
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builder.add("b", new Value(false));
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builder.close();
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final String json = VPackParser.toJson(builder.slice());
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Assert.assertEquals("{\"a\":true,\"b\":false}", json);
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}
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@Test
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public void objectNumberField() throws VPackException {
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final VPackBuilder builder = new VPackBuilder();
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builder.add(new Value(ValueType.OBJECT));
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builder.add("a", new Value(5));
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builder.add("b", new Value(5.5));
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builder.close();
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final String json = VPackParser.toJson(builder.slice());
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Assert.assertEquals("{\"a\":5,\"b\":5.5}", json);
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}
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@Test
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public void objectDateField() throws VPackException {
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final VPackBuilder builder = new VPackBuilder();
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builder.add(new Value(ValueType.OBJECT));
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builder.add("a", new Value(new Date(946681200000L)));// 2000-01-01
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builder.close();
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final String json = VPackParser.toJson(builder.slice());
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Assert.assertEquals("{\"a\":\"Jan 1, 2000 12:00:00 AM\"}", json);
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}
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@Test
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public void arrayInObject() throws VPackException {
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final VPackBuilder builder = new VPackBuilder();
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builder.add(new Value(ValueType.OBJECT));
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builder.add("a", new Value(ValueType.ARRAY));
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builder.add(new Value(1));
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builder.add(new Value(2));
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builder.add(new Value(3));
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builder.close();
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builder.add("b", new Value(ValueType.ARRAY));
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builder.add(new Value("a"));
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builder.add(new Value("b"));
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builder.add(new Value("c"));
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builder.close();
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builder.close();
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final String json = VPackParser.toJson(builder.slice());
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Assert.assertEquals("{\"a\":[1,2,3],\"b\":[\"a\",\"b\",\"c\"]}", json);
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}
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@Test
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public void objectInObject() throws VPackException {
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final VPackBuilder builder = new VPackBuilder();
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builder.add(new Value(ValueType.OBJECT));
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builder.add("a", new Value(ValueType.OBJECT));
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builder.add("aa", new Value("test"));
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builder.add("ab", new Value(true));
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builder.close();
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builder.add("b", new Value(ValueType.OBJECT));
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builder.add("ba", new Value("test"));
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builder.add("bb", new Value(5.5));
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builder.close();
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builder.close();
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final String json = VPackParser.toJson(builder.slice());
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Assert.assertEquals("{\"a\":{\"aa\":\"test\",\"ab\":true},\"b\":{\"ba\":\"test\",\"bb\":5.5}}", json);
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}
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@Test
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public void objectInArray() throws VPackException {
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final VPackBuilder builder = new VPackBuilder();
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builder.add(new Value(ValueType.ARRAY));
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builder.add(new Value(ValueType.OBJECT));
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builder.add("a", new Value("test"));
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builder.close();
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builder.add(new Value(ValueType.OBJECT));
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builder.add("a", new Value("test"));
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builder.close();
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builder.close();
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final String json = VPackParser.toJson(builder.slice());
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Assert.assertEquals("[{\"a\":\"test\"},{\"a\":\"test\"}]", json);
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}
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@Test
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public void arrayInArray() throws VPackException {
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final VPackBuilder builder = new VPackBuilder();
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builder.add(new Value(ValueType.ARRAY));
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builder.add(new Value(ValueType.ARRAY));
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builder.add(new Value(1));
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builder.add(new Value(2));
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builder.add(new Value(3));
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builder.close();
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builder.add(new Value(ValueType.ARRAY));
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builder.add(new Value("a"));
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builder.add(new Value("b"));
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builder.add(new Value("c"));
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builder.close();
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builder.close();
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final String json = VPackParser.toJson(builder.slice());
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Assert.assertEquals("[[1,2,3],[\"a\",\"b\",\"c\"]]", json);
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}
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}

‎src/test/java/com/arangodb/velocypack/VPackTestSuite.java

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*/
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@RunWith(Suite.class)
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@SuiteClasses({ VPackSerializeDeserializeTest.class, VPackBuilderTest.class, VPackSliceTest.class, ValueTest.class,
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SliceIteratorTest.class })
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SliceIteratorTest.class, VPackParserTest.class })
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public class VPackTestSuite {
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}

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