Checkout `xmpp-addr` library 0.8.0 (fa47cac8) locally

xmpp-addr: Backfill missing class method for Java 1.7
This backfills missing class methods for `java.nio.charset.StandardCharsets`
and `java.util.Objects` for compatibility with platforms which do not support
these (mainly Android SDK versions <= 18).

Change `minSdkVersion` to 18, backfill missing methods
This reduces the minimum SDK version to 18 (Android 4.3), which notably is
the last supported version for the BlackBerry OS 10.3 Android compatibility
layer.

Drop support for Android 4.1 and 4.2

1 files changed, 179 insertions, 0 deletions

diff --git a/libs/xmpp-addr/src/main/java/rocks/xmpp/addr/AbstractJid.java b/libs/xmpp-addr/src/main/java/rocks/xmpp/addr/AbstractJid.java
new file mode 100644
index 000000000..963c3a491
--- /dev/null
+++ b/libs/xmpp-addr/src/main/java/rocks/xmpp/addr/AbstractJid.java
@@ -0,0 +1,179 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2014-2017 Christian Schudt
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+package rocks.xmpp.addr;
+
+import java.text.Collator;
+import java.util.Arrays;
+
+/**
+ * Abstract Jid implementation for both full and bare JIDs.
+ *
+ * @author Christian Schudt
+ */
+abstract class AbstractJid implements Jid {
+
+    /**
+     * Checks if the JID is a full JID.
+     * <blockquote>
+     * <p>The term "full JID" refers to an XMPP address of the form &lt;localpart@domainpart/resourcepart&gt; (for a particular authorized client or device associated with an account) or of the form &lt;domainpart/resourcepart&gt; (for a particular resource or script associated with a server).</p>
+     * </blockquote>
+     *
+     * @return True, if the JID is a full JID; otherwise false.
+     */
+    @Override
+    public final boolean isFullJid() {
+        return getResource() != null;
+    }
+
+    /**
+     * Checks if the JID is a bare JID.
+     * <blockquote>
+     * <p>The term "bare JID" refers to an XMPP address of the form &lt;localpart@domainpart&gt; (for an account at a server) or of the form &lt;domainpart&gt; (for a server).</p>
+     * </blockquote>
+     *
+     * @return True, if the JID is a bare JID; otherwise false.
+     */
+    @Override
+    public final boolean isBareJid() {
+        return getResource() == null;
+    }
+
+    @Override
+    public final boolean isDomainJid() {
+        return getLocal() == null;
+    }
+
+    @Override
+    public final boolean equals(Object o) {
+        if (o == this) {
+            return true;
+        }
+        if (!(o instanceof Jid)) {
+            return false;
+        }
+        Jid other = (Jid) o;
+
+        return (getLocal() == other.getLocal() || getLocal() != null && getLocal().equals(other.getLocal()))
+            && (getDomain() == other.getDomain() || getDomain() != null && getDomain().equals(other.getDomain()))
+            && (getResource() == other.getResource() || getResource() != null && getResource().equals(other.getResource()));
+    }
+
+    @Override
+    public final int hashCode() {
+        return Arrays.hashCode(new String[]{getLocal(), getDomain(), getResource()});
+    }
+
+    /**
+     * Compares this JID with another JID. First domain parts are compared. If these are equal, local parts are compared
+     * and if these are equal, too, resource parts are compared.
+     *
+     * @param o The other JID.
+     * @return The comparison result.
+     */
+    @Override
+    public final int compareTo(Jid o) {
+
+        if (this == o) {
+            return 0;
+        }
+
+        if (o != null) {
+            final Collator collator = Collator.getInstance();
+            int result;
+            // First compare domain parts.
+            if (getDomain() != null) {
+                result = o.getDomain() != null ? collator.compare(getDomain(), o.getDomain()) : -1;
+            } else {
+                result = o.getDomain() != null ? 1 : 0;
+            }
+            // If the domains are equal, compare local parts.
+            if (result == 0) {
+                if (getLocal() != null) {
+                    // If this local part is not null, but the other is null, move this down (1).
+                    result = o.getLocal() != null ? collator.compare(getLocal(), o.getLocal()) : 1;
+                } else {
+                    // If this local part is null, but the other is not, move this up (-1).
+                    result = o.getLocal() != null ? -1 : 0;
+                }
+            }
+            // If the local parts are equal, compare resource parts.
+            if (result == 0) {
+                if (getResource() != null) {
+                    // If this resource part is not null, but the other is null, move this down (1).
+                    return o.getResource() != null ? collator.compare(getResource(), o.getResource()) : 1;
+                } else {
+                    // If this resource part is null, but the other is not, move this up (-1).
+                    return o.getResource() != null ? -1 : 0;
+                }
+            }
+            return result;
+        } else {
+            return -1;
+        }
+    }
+
+    @Override
+    public final int length() {
+        return toString().length();
+    }
+
+    @Override
+    public final char charAt(int index) {
+        return toString().charAt(index);
+    }
+
+    @Override
+    public final CharSequence subSequence(int start, int end) {
+        return toString().subSequence(start, end);
+    }
+
+    /**
+     * Returns the JID in its string representation, i.e. [ localpart "@" ] domainpart [ "/" resourcepart ].
+     *
+     * @return The JID.
+     * @see #toEscapedString()
+     */
+    @Override
+    public final String toString() {
+        return toString(getLocal(), getDomain(), getResource());
+    }
+
+    @Override
+    public final String toEscapedString() {
+        return toString(getEscapedLocal(), getDomain(), getResource());
+    }
+
+    static String toString(String local, String domain, String resource) {
+        StringBuilder sb = new StringBuilder();
+        if (local != null) {
+            sb.append(local).append('@');
+        }
+        sb.append(domain);
+        if (resource != null) {
+            sb.append('/').append(resource);
+        }
+        return sb.toString();
+    }
+}