root / src / gr / grnet / pithos / web / client / Helpers.java @ e6e9f6e6
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package gr.grnet.pithos.web.client; |
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import com.google.gwt.json.client.JSONArray; |
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import com.google.gwt.json.client.JSONString; |
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import java.util.ArrayList; |
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import java.util.Collections; |
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import java.util.HashMap; |
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import java.util.List; |
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/**
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* Helper methods.
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*/
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public final class Helpers { |
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private Helpers() {}
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public static boolean isEmptySafe(CharSequence s) { |
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return s == null || s.length() == 0; |
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} |
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public static <K, V> HashMap<K, V> copyHashMap(HashMap<K, V> map) { |
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assert map != null; |
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return new HashMap<K, V>(map); |
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} |
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public static <T> List<T> safeList(List<T> list) { |
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if(list == null) { |
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return new ArrayList<T>(); |
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} |
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return list;
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} |
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public static <T> List<T> toList(T ...items) { |
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final List<T> list = new ArrayList<T>(); |
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Collections.addAll(list, items);
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return list;
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} |
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public static JSONArray listToJSONArray(List<String> list) { |
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final JSONArray jsonArray = new JSONArray(); |
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if(list == null) { |
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return jsonArray;
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} |
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for(int i = 0; i < list.size(); i++) { |
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final JSONString jsonString = new JSONString(list.get(i)); |
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jsonArray.set(i, jsonString); |
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} |
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return jsonArray;
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} |
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public static String stripTrailing(String s, String trailing) { |
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while(s.endsWith(trailing)) {
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s = s.substring(0, s.length() - trailing.length());
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} |
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return s;
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} |
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public static String upToIncludingLastPart(String s, String part) { |
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int index = s.lastIndexOf(part);
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if(index == -1) { |
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return s;
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} |
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return s.substring(0, index + part.length()); |
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} |
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} |