1 files changed, 69 insertions, 0 deletions
diff --git a/src/com/android/providers/contacts/util/CappedStringBuilder.java b/src/com/android/providers/contacts/util/CappedStringBuilder.java
new file mode 100644
index 00000000..74b70cf5
--- /dev/null
+++ b/src/com/android/providers/contacts/util/CappedStringBuilder.java
@@ -0,0 +1,69 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+package com.android.providers.contacts.util;
+
+import android.util.Log;
+
+import com.android.providers.contacts.AbstractContactsProvider;
+
+public class CappedStringBuilder {
+    private final int mCapSize;
+    private boolean mOver;
+    private final StringBuilder mStringBuilder = new StringBuilder();
+
+    public CappedStringBuilder(int capSize) {
+        mCapSize = capSize;
+    }
+
+    public void clear() {
+        mOver = false;
+        mStringBuilder.setLength(0);
+    }
+
+    public int length() {
+        return mStringBuilder.length();
+    }
+
+    @Override
+    public String toString() {
+        return mStringBuilder.toString();
+    }
+
+    public CappedStringBuilder append(char ch) {
+        if (canAppend(mStringBuilder.length() + 1)) {
+            mStringBuilder.append(ch);
+        }
+        return this;
+    }
+
+    public CappedStringBuilder append(String s) {
+        if (canAppend(mStringBuilder.length() + s.length())) {
+            mStringBuilder.append(s);
+        }
+        return this;
+    }
+
+    private boolean canAppend(int length) {
+        if (mOver || length > mCapSize) {
+            if (!mOver && AbstractContactsProvider.VERBOSE_LOGGING) {
+                Log.w(AbstractContactsProvider.TAG, "String too long! new length=" + length);
+            }
+            mOver = true;
+            return false;
+        }
+        return true;
+    }
+}