com.google.cloud.tools.intellij.debugger.BreakpointComparer.java Source code

Introduction

Here is the source code for com.google.cloud.tools.intellij.debugger.BreakpointComparer.java

Source

/*
 * Copyright (C) 2016 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.google.cloud.tools.intellij.debugger;

import com.google.api.client.repackaged.com.google.common.base.Strings;
import com.google.api.services.clouddebugger.v2.model.Breakpoint;
import com.google.api.services.clouddebugger.v2.model.SourceLocation;

import org.joda.time.format.ISODateTimeFormat;

import java.util.Comparator;
import java.util.Date;

/**
 * BreakpointComparer is a comparer used to sort breakpoints in the historical snapshot list.
 */
public class BreakpointComparer implements Comparator<Breakpoint> {

    private static final BreakpointComparer DEFAULT_INSTANCE = new BreakpointComparer();
    private static final Date MINIMUM_DATE = new Date(Long.MIN_VALUE);

    private BreakpointComparer() {
    }

    public static BreakpointComparer getDefaultInstance() {
        return DEFAULT_INSTANCE;
    }

    @SuppressWarnings("ConstantConditions")
    @Override
    public int compare(Breakpoint o1, Breakpoint o2) {
        if (o2.getFinalTime() == null && o1.getFinalTime() != null) {
            return 1;
        }
        if (o2.getFinalTime() != null && o1.getFinalTime() == null) {
            return -1;
        }
        if (o2.getFinalTime() == null && o1.getFinalTime() == null) {
            //compare file and line
            SourceLocation s1 = o1.getLocation();
            SourceLocation s2 = o2.getLocation();
            boolean s1Valid = isSourceLocationValid(s1);
            boolean s2Valid = isSourceLocationValid(s2);
            if (!s1Valid && !s2Valid) {
                return 0;
            }
            if (s1Valid && !s2Valid) {
                return -1;
            }
            if (!s1Valid && s2Valid) {
                return 1;
            }
            if (s1.getPath().equals(s2.getPath())) {
                long s1Line = toLongValue(s1.getLine().longValue());
                long s2Line = toLongValue(s2.getLine().longValue());
                if (s1Line > s2Line) {
                    return 1;
                }
                if (s1Line < s2Line) {
                    return -1;
                }
                return 0;
            }
            return s1.getPath().compareTo(s2.getPath());
        }

        Date d1, d2;
        try {
            d1 = ISODateTimeFormat.dateTime().parseDateTime(o1.getFinalTime()).toDate();
            d2 = ISODateTimeFormat.dateTime().parseDateTime(o2.getFinalTime()).toDate();
        } catch (IllegalArgumentException iae) {
            d1 = MINIMUM_DATE;
            d2 = MINIMUM_DATE;
        }

        return d2.compareTo(d1);
    }

    private static boolean isSourceLocationValid(SourceLocation sourceLocation) {
        if (sourceLocation == null) {
            return false;
        }
        if (Strings.isNullOrEmpty(sourceLocation.getPath())) {
            return false;
        }
        if (sourceLocation.getLine() == null) {
            return false;
        }
        return true;
    }

    private static int toIntValue(Integer integer) {
        return integer != null ? integer.intValue() : 0;
    }

    private static long toLongValue(Long longValue) {
        return longValue != null ? longValue.longValue() : 0;
    }
}