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/*******************************************************************************
* Copyright (c) 2015 Frank Becker and others.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0 which is available at
* https://www.eclipse.org/legal/epl-2.0
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* Frank Becker - initial API and implementation
*******************************************************************************/
package org.eclipse.mylyn.internal.bugzilla.rest.core;
import static com.google.common.collect.Sets.newHashSet;
import java.io.IOException;
import java.util.HashSet;
import java.util.Set;
import org.eclipse.mylyn.tasks.core.data.TaskAttribute;
import com.google.common.base.Function;
import com.google.common.collect.Iterables;
import com.google.common.collect.Sets;
import com.google.gson.Gson;
import com.google.gson.stream.JsonWriter;
public class BugzillaRestGsonUtil {
private class RemoveAddStringHelper {
Set<String> add;
Set<String> remove;
public RemoveAddStringHelper(Set<String> removeSet, Set<String> addSet) {
add = new HashSet<String>(addSet);
remove = new HashSet<String>(removeSet);
if (remove.contains("")) { //$NON-NLS-1$
remove.remove(""); //$NON-NLS-1$
}
if (add.contains("")) { //$NON-NLS-1$
add.remove(""); //$NON-NLS-1$
}
Set<String> intersection = Sets.intersection(addSet, removeSet);
remove.removeAll(intersection);
add.removeAll(intersection);
if (remove.isEmpty()) {
remove = null;
}
if (add.isEmpty()) {
add = null;
}
}
}
private class RemoveAddIntegerHelper {
Set<Integer> add;
Set<Integer> remove;
public RemoveAddIntegerHelper(Set<Integer> removeSet, Set<Integer> addSet) {
add = new HashSet<Integer>(addSet);
remove = new HashSet<Integer>(removeSet);
if (remove.contains(null)) {
remove.remove(null);
}
if (add.contains(null)) {
add.remove(null);
}
Set<Integer> intersection = Sets.intersection(addSet, removeSet);
remove.removeAll(intersection);
add.removeAll(intersection);
if (remove.isEmpty()) {
remove = null;
}
if (add.isEmpty()) {
add = null;
}
}
}
private static Gson gson = new Gson();
public static String convertString2GSonString(String str) {
str = str.replace("\"", "\\\"").replace("\n", "\\\n"); //$NON-NLS-1$//$NON-NLS-2$ //$NON-NLS-3$//$NON-NLS-4$
StringBuffer ostr = new StringBuffer();
for (int i = 0; i < str.length(); i++) {
char ch = str.charAt(i);
if ((ch >= 0x0020) && (ch <= 0x007e)) {
ostr.append(ch);
} else {
ostr.append("\\u"); //$NON-NLS-1$
String hex = Integer.toHexString(str.charAt(i) & 0xFFFF);
for (int j = 0; j < 4 - hex.length(); j++) {
ostr.append("0"); //$NON-NLS-1$
}
ostr.append(hex.toLowerCase());
}
}
return (new String(ostr));
}
private static BugzillaRestGsonUtil instance;
public static BugzillaRestGsonUtil getDefault() {
if (instance == null) {
instance = new BugzillaRestGsonUtil();
}
return instance;
}
public static void buildArrayFromHash(JsonWriter out, String id, Set<String> setNew, boolean asInteger)
throws IOException {
if (!setNew.isEmpty()) {
out.name(id).beginArray();
for (String string : setNew) {
if (!"".equals(string)) {
if (asInteger) {
out.value(Integer.parseInt(string));
} else {
out.value(string);
}
}
}
out.endArray();
}
}
public void buildAddRemoveHash(JsonWriter out, String id, Set<String> setOld, Set<String> setNew)
throws IOException {
RemoveAddStringHelper test = new RemoveAddStringHelper(setOld, setNew);
out.name(id);
gson.toJson(test, RemoveAddStringHelper.class, out);
}
private final Function<String, Integer> convert2Integer = new Function<String, Integer>() {
@Override
public Integer apply(String input) {
if ("".equals(input)) {
return null;
}
return Integer.parseInt(input);
}
};
public void buildAddRemoveIntegerHash(JsonWriter out, String id, Set<String> setOld, Set<String> setNew)
throws IOException {
RemoveAddIntegerHelper test = new RemoveAddIntegerHelper(
newHashSet(Iterables.transform(setOld, convert2Integer)),
newHashSet(Iterables.transform(setNew, convert2Integer)));
out.name(id);
gson.toJson(test, RemoveAddIntegerHelper.class, out);
}
public static void buildFlags(JsonWriter out, Set<TaskAttribute> oldAttributes, TaskAttribute rootTaskData)
throws IOException {
boolean flagFound = false;
for (TaskAttribute element : oldAttributes) {
TaskAttribute taskAttribute = rootTaskData.getAttribute(element.getId());
String id = taskAttribute.getId();
if (id.startsWith(IBugzillaRestConstants.KIND_FLAG)
|| id.startsWith(IBugzillaRestConstants.KIND_FLAG_TYPE)) {
if (!flagFound) {
out.name("flags").beginArray(); //$NON-NLS-1$
}
BugzillaRestFlagMapper flagMapper = BugzillaRestFlagMapper.createFrom(taskAttribute);
flagMapper.applyTo(out);
flagFound = true;
}
}
if (flagFound) {
out.endArray();
}
}
}
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