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Android example source code file (ATResponseParser.java)

This example Android source code file (ATResponseParser.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" TM.

Java - Android tags/keywords

atparseex, atresponseparser, string, stringindexoutofboundsexception

The ATResponseParser.java Android example source code

/*
 * Copyright (C) 2006 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.internal.telephony;

/**
 * {@hide}
 */
public class ATResponseParser
{
    /*************************** Instance Variables **************************/

    private String line;
    private int next = 0;
    private int tokStart, tokEnd;

    /***************************** Class Methods *****************************/

    public
    ATResponseParser (String line)
    {
        this.line = line;
    }

    public boolean
    nextBoolean()
    {
        // "\s*(\d)(,|$)"
        // \d is '0' or '1'

        nextTok();

        if (tokEnd - tokStart > 1) {
            throw new ATParseEx();
        }
        char c = line.charAt(tokStart);

        if (c == '0') return false;
        if (c ==  '1') return true;
        throw new ATParseEx();
    }


    /** positive int only */
    public int
    nextInt()
    {
        // "\s*(\d+)(,|$)"
        int ret = 0;

        nextTok();

        for (int i = tokStart ; i < tokEnd ; i++) {
            char c = line.charAt(i);

            // Yes, ASCII decimal digits only
            if (c < '0' || c > '9') {
                throw new ATParseEx();
            }

            ret *= 10;
            ret += c - '0';
        }

        return ret;
    }

    public String
    nextString()
    {
        nextTok();

        return line.substring(tokStart, tokEnd);
    }

    public boolean
    hasMore()
    {
        return next < line.length();
    }

    private void
    nextTok()
    {
        int len = line.length();

        if (next == 0) {
            skipPrefix();
        }

        if (next >= len) {
            throw new ATParseEx();
        }

        try {
            // \s*("([^"]*)"|(.*)\s*)(,|$)

            char c = line.charAt(next++);
            boolean hasQuote = false;

            c = skipWhiteSpace(c);

            if (c == '"') {
                if (next >= len) {
                    throw new ATParseEx();
                }
                c = line.charAt(next++);
                tokStart = next - 1;
                while (c != '"' && next < len) {
                    c = line.charAt(next++);
                }
                if (c != '"') {
                    throw new ATParseEx();
                }
                tokEnd = next - 1;
                if (next < len && line.charAt(next++) != ',') {
                    throw new ATParseEx();
                }
            } else {
                tokStart = next - 1;
                tokEnd = tokStart;
                while (c != ',') {
                    if (!Character.isWhitespace(c)) {
                        tokEnd = next;
                    }
                    if (next == len) {
                        break;
                    }
                    c = line.charAt(next++);
                }
            }
        } catch (StringIndexOutOfBoundsException ex) {
            throw new ATParseEx();
        }
    }


    /** Throws ATParseEx if whitespace extends to the end of string */
    private char
    skipWhiteSpace (char c)
    {
        int len;
        len = line.length();
        while (next < len && Character.isWhitespace(c)) {
            c = line.charAt(next++);
        }

        if (Character.isWhitespace(c)) {
            throw new ATParseEx();
        }
        return c;
    }


    private void
    skipPrefix()
    {
        // consume "^[^:]:"

        next = 0;
        int s = line.length();
        while (next < s){
            char c = line.charAt(next++);

            if (c == ':') {
                return;
            }
        }

        throw new ATParseEx("missing prefix");
    }

}

Other Android examples (source code examples)

Here is a short list of links related to this Android ATResponseParser.java source code file:

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