xref: /external/robolectric/v1/src/main/java/com/xtremelabs/robolectric/shadows/ShadowTextUtils.java

package com.xtremelabs.robolectric.shadows;

import android.text.TextUtils;
import com.xtremelabs.robolectric.internal.Implementation;
import com.xtremelabs.robolectric.internal.Implements;

/**
 * Shadow for the {@code TextUtils} class that implements the {@link #expandTemplate(CharSequence, CharSequence...)}
 * method.
 */
@SuppressWarnings({"UnusedDeclaration"})
@Implements(TextUtils.class)
public class ShadowTextUtils {
    @Implementation
    public static CharSequence expandTemplate(CharSequence template,
                                              CharSequence... values) {
        String s = template.toString();
        for (int i = 0, valuesLength = values.length; i < valuesLength; i++) {
            CharSequence value = values[i];
            s = s.replace("^" + (i + 1), value);
        }
        return s;
    }

    @Implementation
    public static boolean isEmpty(CharSequence s) {
      return (s == null || s.length() == 0);
    }

    @Implementation
    public static String join(CharSequence delimiter, Iterable tokens) {
        StringBuilder sb = new StringBuilder();
        boolean firstTime = true;
        for (Object token: tokens) {
            if (firstTime) {
                firstTime = false;
            } else {
                sb.append(delimiter);
            }
            sb.append(token);
        }
        return sb.toString();
    }

    @Implementation
    public static String join(CharSequence delimiter, Object[] tokens) {
        StringBuilder sb = new StringBuilder();
        boolean firstTime = true;
        for (Object token: tokens) {
            if (firstTime) {
                firstTime = false;
            } else {
                sb.append(delimiter);
            }
            sb.append(token);
        }
        return sb.toString();
    }
}